PPO playing CarRacing-v0 from https://github.com/sgoodfriend/rl-algo-impls/tree/e47a44c4d891f48885af0b1605b30d19fc67b5af

.gitignore

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+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+pip-wheel-metadata/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+.python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# Logging into tensorboard and wandb
+runs/*
+wandb
+
+# macOS
+.DS_STORE
+
+# Local scratch work
+scratch/*
+
+# vscode
+.vscode/
+
+# Don't bother tracking saved_models or videos
+saved_models/*
+downloaded_models/*
+videos/*

LICENSE

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+MIT License
+
+Copyright (c) 2023 Scott Goodfriend
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+---
+library_name: rl-algo-impls
+tags:
+- CarRacing-v0
+- ppo
+- deep-reinforcement-learning
+- reinforcement-learning
+model-index:
+- name: ppo
+  results:
+  - metrics:
+    - type: mean_reward
+      value: 777.12 +/- 224.5
+      name: mean_reward
+    task:
+      type: reinforcement-learning
+      name: reinforcement-learning
+    dataset:
+      name: CarRacing-v0
+      type: CarRacing-v0
+---
+# **PPO** Agent playing **CarRacing-v0**
+
+This is a trained model of a **PPO** agent playing **CarRacing-v0** using the [/sgoodfriend/rl-algo-impls](https://github.com/sgoodfriend/rl-algo-impls) repo.
+
+All models trained at this commit can be found at https://api.wandb.ai/links/sgoodfriend/v4wd7cp5.
+
+## Training Results
+
+This model was trained from 3 trainings of **PPO** agents using different initial seeds. These agents were trained by checking out [e47a44c](https://github.com/sgoodfriend/rl-algo-impls/tree/e47a44c4d891f48885af0b1605b30d19fc67b5af). The best and last models were kept from each training. This submission has loaded the best models from each training, reevaluates them, and selects the best model from these latest evaluations (mean - std).
+
+| algo   | env          |   seed |   reward_mean |   reward_std |   eval_episodes | best   | wandb_url                                                                    |
+|:-------|:-------------|-------:|--------------:|-------------:|----------------:|:-------|:-----------------------------------------------------------------------------|
+| ppo    | CarRacing-v0 |      1 |       777.12  |      224.504 |              16 | *      | [wandb](https://wandb.ai/sgoodfriend/rl-algo-impls-benchmarks/runs/ojq3cif0) |
+| ppo    | CarRacing-v0 |      2 |       613.084 |      175.573 |              16 |        | [wandb](https://wandb.ai/sgoodfriend/rl-algo-impls-benchmarks/runs/7wtzr60u) |
+| ppo    | CarRacing-v0 |      3 |       668.535 |      181.695 |              16 |        | [wandb](https://wandb.ai/sgoodfriend/rl-algo-impls-benchmarks/runs/4l0zprbu) |
+
+
+### Prerequisites: Weights & Biases (WandB)
+Training and benchmarking assumes you have a Weights & Biases project to upload runs to.
+By default training goes to a rl-algo-impls project while benchmarks go to
+rl-algo-impls-benchmarks. During training and benchmarking runs, videos of the best
+models and the model weights are uploaded to WandB.
+
+Before doing anything below, you'll need to create a wandb account and run `wandb
+login`.
+
+
+
+## Usage
+/sgoodfriend/rl-algo-impls: https://github.com/sgoodfriend/rl-algo-impls
+
+Note: While the model state dictionary and hyperaparameters are saved, the latest
+implementation could be sufficiently different to not be able to reproduce similar
+results. You might need to checkout the commit the agent was trained on:
+[e47a44c](https://github.com/sgoodfriend/rl-algo-impls/tree/e47a44c4d891f48885af0b1605b30d19fc67b5af).
+```
+# Downloads the model, sets hyperparameters, and runs agent for 3 episodes
+python enjoy.py --wandb-run-path=sgoodfriend/rl-algo-impls-benchmarks/ojq3cif0
+```
+
+Setup hasn't been completely worked out yet, so you might be best served by using Google
+Colab starting from the
+[colab_enjoy.ipynb](https://github.com/sgoodfriend/rl-algo-impls/blob/main/colab_enjoy.ipynb)
+notebook.
+
+
+
+## Training
+If you want the highest chance to reproduce these results, you'll want to checkout the
+commit the agent was trained on: [e47a44c](https://github.com/sgoodfriend/rl-algo-impls/tree/e47a44c4d891f48885af0b1605b30d19fc67b5af). While
+training is deterministic, different hardware will give different results.
+
+```
+python train.py --algo ppo --env CarRacing-v0 --seed 1
+```
+
+Setup hasn't been completely worked out yet, so you might be best served by using Google
+Colab starting from the
+[colab_train.ipynb](https://github.com/sgoodfriend/rl-algo-impls/blob/main/colab_train.ipynb)
+notebook.
+
+
+
+## Benchmarking (with Lambda Labs instance)
+This and other models from https://api.wandb.ai/links/sgoodfriend/v4wd7cp5 were generated by running a script on a Lambda
+Labs instance. In a Lambda Labs instance terminal:
+```
+git clone git@github.com:sgoodfriend/rl-algo-impls.git
+cd rl-algo-impls
+bash ./lambda_labs/setup.sh
+wandb login
+bash ./lambda_labs/benchmark.sh
+```
+
+### Alternative: Google Colab Pro+
+As an alternative,
+[colab_benchmark.ipynb](https://github.com/sgoodfriend/rl-algo-impls/tree/main/benchmarks#:~:text=colab_benchmark.ipynb),
+can be used. However, this requires a Google Colab Pro+ subscription and running across
+4 separate instances because otherwise running all jobs will exceed the 24-hour limit.
+
+
+
+## Hyperparameters
+This isn't exactly the format of hyperparams in hyperparams/ppo.yml, but instead the Wandb Run Config. However, it's very
+close and has some additional data:
+```
+algo: ppo
+algo_hyperparams:
+  batch_size: 128
+  clip_range: 0.2
+  ent_coef: 0
+  gae_lambda: 0.95
+  gamma: 0.99
+  learning_rate: 0.0001
+  learning_rate_decay: linear
+  max_grad_norm: 0.5
+  n_epochs: 10
+  n_steps: 512
+  sde_sample_freq: 4
+  vf_coef: 0.5
+env: impala-CarRacing-v0
+env_hyperparams:
+  frame_stack: 4
+  n_envs: 8
+env_id: CarRacing-v0
+n_timesteps: 4000000
+policy_hyperparams:
+  activation_fn: relu
+  cnn_feature_dim: 256
+  cnn_layers_init_orthogonal: false
+  cnn_style: impala
+  hidden_sizes: []
+  init_layers_orthogonal: true
+  log_std_init: -2
+  share_features_extractor: false
+  use_sde: true
+seed: 1
+use_deterministic_algorithms: true
+wandb_entity: null
+wandb_project_name: rl-algo-impls-benchmarks
+wandb_tags:
+- benchmark_e47a44c
+- host_129-146-2-230
+
+```

benchmark_publish.py

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+import argparse
+import subprocess
+import wandb
+import wandb.apis.public
+
+from collections import defaultdict
+from multiprocessing.pool import ThreadPool
+from typing import List, NamedTuple
+
+
+class RunGroup(NamedTuple):
+    algo: str
+    env_id: str
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        "--wandb-project-name",
+        type=str,
+        default="rl-algo-impls-benchmarks",
+        help="WandB project name to load runs from",
+    )
+    parser.add_argument(
+        "--wandb-entity",
+        type=str,
+        default=None,
+        help="WandB team of project. None uses default entity",
+    )
+    parser.add_argument("--wandb-tags", type=str, nargs="+", help="WandB tags")
+    parser.add_argument("--wandb-report-url", type=str, help="Link to WandB report")
+    parser.add_argument(
+        "--envs", type=str, nargs="*", help="Optional filter down to these envs"
+    )
+    parser.add_argument(
+        "--exclude-envs",
+        type=str,
+        nargs="*",
+        help="Environments to exclude from publishing",
+    )
+    parser.add_argument(
+        "--huggingface-user",
+        type=str,
+        default=None,
+        help="Huggingface user or team to upload model cards. Defaults to huggingface-cli login user",
+    )
+    parser.add_argument(
+        "--pool-size",
+        type=int,
+        default=3,
+        help="How many publish jobs can run in parallel",
+    )
+    parser.add_argument(
+        "--virtual-display", action="store_true", help="Use headless virtual display"
+    )
+    # parser.set_defaults(
+    #     wandb_tags=["benchmark_e47a44c", "host_129-146-2-230"],
+    #     wandb_report_url="https://api.wandb.ai/links/sgoodfriend/v4wd7cp5",
+    #     envs=[],
+    #     exclude_envs=[],
+    # )
+    args = parser.parse_args()
+    print(args)
+
+    api = wandb.Api()
+    all_runs = api.runs(
+        f"{args.wandb_entity or api.default_entity}/{args.wandb_project_name}"
+    )
+
+    required_tags = set(args.wandb_tags)
+    runs: List[wandb.apis.public.Run] = [
+        r
+        for r in all_runs
+        if required_tags.issubset(set(r.config.get("wandb_tags", [])))
+    ]
+
+    runs_paths_by_group = defaultdict(list)
+    for r in runs:
+        if r.state != "finished":
+            continue
+        algo = r.config["algo"]
+        env = r.config["env"]
+        if args.envs and env not in args.envs:
+            continue
+        if args.exclude_envs and env in args.exclude_envs:
+            continue
+        run_group = RunGroup(algo, env)
+        runs_paths_by_group[run_group].append("/".join(r.path))
+
+    def run(run_paths: List[str]) -> None:
+        publish_args = ["python", "huggingface_publish.py"]
+        publish_args.append("--wandb-run-paths")
+        publish_args.extend(run_paths)
+        publish_args.append("--wandb-report-url")
+        publish_args.append(args.wandb_report_url)
+        if args.huggingface_user:
+            publish_args.append("--huggingface-user")
+            publish_args.append(args.huggingface_user)
+        if args.virtual_display:
+            publish_args.append("--virtual-display")
+        subprocess.run(publish_args)
+
+    tp = ThreadPool(args.pool_size)
+    for run_paths in runs_paths_by_group.values():
+        tp.apply_async(run, (run_paths,))
+    tp.close()
+    tp.join()

benchmarks/benchmark_test.sh

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+source benchmarks/train_loop.sh
+
+export WANDB_PROJECT_NAME="rl-algo-impls"
+
+BENCHMARK_MAX_PROCS="${BENCHMARK_MAX_PROCS:-3}"
+
+ALGOS=(
+    # "vpg"
+    "dqn"
+    # "ppo"
+)
+ENVS=(
+    # Basic
+    "CartPole-v1"
+    "MountainCar-v0"
+    # "MountainCarContinuous-v0"
+    "Acrobot-v1"
+    "LunarLander-v2"
+    # # PyBullet
+    # "HalfCheetahBulletEnv-v0"
+    # "AntBulletEnv-v0"
+    # "HopperBulletEnv-v0"
+    # "Walker2DBulletEnv-v0"
+    # # CarRacing
+    # "CarRacing-v0"
+    # Atari
+    "PongNoFrameskip-v4"
+    "BreakoutNoFrameskip-v4"
+    "SpaceInvadersNoFrameskip-v4"
+    "QbertNoFrameskip-v4"
+)
+train_loop "${ALGOS[*]}" "${ENVS[*]}" | xargs -I CMD -P $BENCHMARK_MAX_PROCS bash -c CMD

benchmarks/colab_atari1.sh

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+source benchmarks/train_loop.sh
+ALGOS="ppo"
+ENVS="PongNoFrameskip-v4 BreakoutNoFrameskip-v4"
+BENCHMARK_MAX_PROCS="${BENCHMARK_MAX_PROCS:-3}"
+train_loop $ALGOS "$ENVS" | xargs -I CMD -P $BENCHMARK_MAX_PROCS bash -c CMD

benchmarks/colab_atari2.sh

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+source benchmarks/train_loop.sh
+ALGOS="ppo"
+ENVS="SpaceInvadersNoFrameskip-v4 QbertNoFrameskip-v4"
+BENCHMARK_MAX_PROCS="${BENCHMARK_MAX_PROCS:-3}"
+train_loop $ALGOS "$ENVS" | xargs -I CMD -P $BENCHMARK_MAX_PROCS bash -c CMD

benchmarks/colab_basic.sh

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+source benchmarks/train_loop.sh
+ALGOS="ppo"
+ENVS="CartPole-v1 MountainCar-v0 MountainCarContinuous-v0 Acrobot-v1 LunarLander-v2"
+BENCHMARK_MAX_PROCS="${BENCHMARK_MAX_PROCS:-3}"
+train_loop $ALGOS "$ENVS" | xargs -I CMD -P $BENCHMARK_MAX_PROCS bash -c CMD

benchmarks/colab_benchmark.ipynb

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+{
+  "nbformat": 4,
+  "nbformat_minor": 0,
+  "metadata": {
+    "colab": {
+      "provenance": [],
+      "machine_shape": "hm",
+      "authorship_tag": "ABX9TyOGIH7rqgasim3Sz7b1rpoE",
+      "include_colab_link": true
+    },
+    "kernelspec": {
+      "name": "python3",
+      "display_name": "Python 3"
+    },
+    "language_info": {
+      "name": "python"
+    },
+    "gpuClass": "standard",
+    "accelerator": "GPU"
+  },
+  "cells": [
+    {
+      "cell_type": "markdown",
+      "metadata": {
+        "id": "view-in-github",
+        "colab_type": "text"
+      },
+      "source": [
+        "<a href=\"https://colab.research.google.com/github/sgoodfriend/rl-algo-impls/blob/main/benchmarks/colab_benchmark.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "source": [
+        "# [sgoodfriend/rl-algo-impls](https://github.com/sgoodfriend/rl-algo-impls) in Google Colaboratory\n",
+        "## Parameters\n",
+        "\n",
+        "\n",
+        "1.   Wandb\n",
+        "\n"
+      ],
+      "metadata": {
+        "id": "S-tXDWP8WTLc"
+      }
+    },
+    {
+      "cell_type": "code",
+      "source": [
+        "from getpass import getpass\n",
+        "import os\n",
+        "os.environ[\"WANDB_API_KEY\"] = getpass(\"Wandb API key to upload metrics, videos, and models: \")"
+      ],
+      "metadata": {
+        "id": "1ZtdYgxWNGwZ"
+      },
+      "execution_count": null,
+      "outputs": []
+    },
+    {
+      "cell_type": "markdown",
+      "source": [
+        "## Setup\n",
+        "Clone [sgoodfriend/rl-algo-impls](https://github.com/sgoodfriend/rl-algo-impls) "
+      ],
+      "metadata": {
+        "id": "bsG35Io0hmKG"
+      }
+    },
+    {
+      "cell_type": "code",
+      "source": [
+        "%%capture\n",
+        "!git clone https://github.com/sgoodfriend/rl-algo-impls.git"
+      ],
+      "metadata": {
+        "id": "k5ynTV25hdAf"
+      },
+      "execution_count": null,
+      "outputs": []
+    },
+    {
+      "cell_type": "markdown",
+      "source": [
+        "Installing the correct packages:\n",
+        "\n",
+        "While conda and poetry are generally used for package management, the mismatch in Python versions (3.10 in the project file vs 3.8 in Colab) makes using the package yml files difficult to use. For now, instead I'm going to specify the list of requirements manually below:"
+      ],
+      "metadata": {
+        "id": "jKxGok-ElYQ7"
+      }
+    },
+    {
+      "cell_type": "code",
+      "source": [
+        "%%capture\n",
+        "!apt install python-opengl\n",
+        "!apt install ffmpeg\n",
+        "!apt install xvfb\n",
+        "!apt install swig"
+      ],
+      "metadata": {
+        "id": "nn6EETTc2Ewf"
+      },
+      "execution_count": null,
+      "outputs": []
+    },
+    {
+      "cell_type": "code",
+      "source": [
+        "%%capture\n",
+        "%cd /content/rl-algo-impls\n",
+        "!pip install -r colab_requirements.txt"
+      ],
+      "metadata": {
+        "id": "AfZh9rH3yQii"
+      },
+      "execution_count": null,
+      "outputs": []
+    },
+    {
+      "cell_type": "markdown",
+      "source": [
+        "## Run Once Per Runtime"
+      ],
+      "metadata": {
+        "id": "4o5HOLjc4wq7"
+      }
+    },
+    {
+      "cell_type": "code",
+      "source": [
+        "import wandb\n",
+        "wandb.login()"
+      ],
+      "metadata": {
+        "id": "PCXa5tdS2qFX"
+      },
+      "execution_count": null,
+      "outputs": []
+    },
+    {
+      "cell_type": "markdown",
+      "source": [
+        "## Restart Session beteween runs"
+      ],
+      "metadata": {
+        "id": "AZBZfSUV43JQ"
+      }
+    },
+    {
+      "cell_type": "code",
+      "source": [
+        "%%capture\n",
+        "from pyvirtualdisplay import Display\n",
+        "\n",
+        "virtual_display = Display(visible=0, size=(1400, 900))\n",
+        "virtual_display.start()"
+      ],
+      "metadata": {
+        "id": "VzemeQJP2NO9"
+      },
+      "execution_count": null,
+      "outputs": []
+    },
+    {
+      "cell_type": "markdown",
+      "source": [
+        "The below 5 bash scripts train agents on environments with 3 seeds each:\n",
+        "- colab_basic.sh and colab_pybullet.sh test on a set of basic gym environments and 4 PyBullet environments. Running both together will likely take about 18 hours. This is likely to run into runtime limits for free Colab and Colab Pro, but is fine for Colab Pro+.\n",
+        "- colab_carracing.sh only trains 3 seeds on CarRacing-v0, which takes almost 22 hours on Colab Pro+ on high-RAM, standard GPU.\n",
+        "- colab_atari1.sh and colab_atari2.sh likely need to be run separately because each takes about 19 hours on high-RAM, standard GPU."
+      ],
+      "metadata": {
+        "id": "nSHfna0hLlO1"
+      }
+    },
+    {
+      "cell_type": "code",
+      "source": [
+        "%cd /content/rl-algo-impls\n",
+        "os.environ[\"BENCHMARK_MAX_PROCS\"] = str(1) # Can't reliably raise this to 2+, but would make it faster.\n",
+        "!./benchmarks/colab_basic.sh\n",
+        "!./benchmarks/colab_pybullet.sh\n",
+        "# !./benchmarks/colab_carracing.sh\n",
+        "# !./benchmarks/colab_atari1.sh\n",
+        "# !./benchmarks/colab_atari2.sh"
+      ],
+      "metadata": {
+        "id": "07aHYFH1zfXa"
+      },
+      "execution_count": null,
+      "outputs": []
+    }
+  ]
+}

benchmarks/colab_carracing.sh

@@ -0,0 +1,5 @@
+source benchmarks/train_loop.sh
+ALGOS="ppo"
+ENVS="CarRacing-v0"
+BENCHMARK_MAX_PROCS="${BENCHMARK_MAX_PROCS:-3}"
+train_loop $ALGOS "$ENVS" | xargs -I CMD -P $BENCHMARK_MAX_PROCS bash -c CMD

benchmarks/colab_pybullet.sh

@@ -0,0 +1,5 @@
+source benchmarks/train_loop.sh
+ALGOS="ppo"
+ENVS="HalfCheetahBulletEnv-v0 AntBulletEnv-v0 HopperBulletEnv-v0 Walker2DBulletEnv-v0"
+BENCHMARK_MAX_PROCS="${BENCHMARK_MAX_PROCS:-3}"
+train_loop $ALGOS "$ENVS" | xargs -I CMD -P $BENCHMARK_MAX_PROCS bash -c CMD

benchmarks/train_loop.sh

@@ -0,0 +1,15 @@
+train_loop () {
+    local WANDB_TAGS="benchmark_$(git rev-parse --short HEAD) host_$(hostname)"
+    local algo
+    local env
+    local seed
+    local WANDB_PROJECT_NAME="${WANDB_PROJECT_NAME:-rl-algo-impls-benchmarks}"
+    local SEEDS="${SEEDS:-1 2 3}"
+    for algo in $(echo $1); do
+        for env in $(echo $2); do
+            for seed in $SEEDS; do
+                echo python train.py --algo $algo --env $env --seed $seed --pool-size 1 --wandb-tags $WANDB_TAGS --wandb-project-name $WANDB_PROJECT_NAME
+            done
+        done
+    done
+}

colab_enjoy.ipynb

@@ -0,0 +1,198 @@
+{
+  "nbformat": 4,
+  "nbformat_minor": 0,
+  "metadata": {
+    "colab": {
+      "provenance": [],
+      "machine_shape": "hm",
+      "authorship_tag": "ABX9TyN6S7kyJKrM5x0OOiN+CgTc",
+      "include_colab_link": true
+    },
+    "kernelspec": {
+      "name": "python3",
+      "display_name": "Python 3"
+    },
+    "language_info": {
+      "name": "python"
+    },
+    "gpuClass": "standard",
+    "accelerator": "GPU"
+  },
+  "cells": [
+    {
+      "cell_type": "markdown",
+      "metadata": {
+        "id": "view-in-github",
+        "colab_type": "text"
+      },
+      "source": [
+        "<a href=\"https://colab.research.google.com/github/sgoodfriend/rl-algo-impls/blob/main/colab_enjoy.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "source": [
+        "# [sgoodfriend/rl-algo-impls](https://github.com/sgoodfriend/rl-algo-impls) in Google Colaboratory\n",
+        "## Parameters\n",
+        "\n",
+        "\n",
+        "1.   Wandb\n",
+        "\n"
+      ],
+      "metadata": {
+        "id": "S-tXDWP8WTLc"
+      }
+    },
+    {
+      "cell_type": "code",
+      "source": [
+        "from getpass import getpass\n",
+        "import os\n",
+        "os.environ[\"WANDB_API_KEY\"] = getpass(\"Wandb API key to upload metrics, videos, and models: \")"
+      ],
+      "metadata": {
+        "id": "1ZtdYgxWNGwZ"
+      },
+      "execution_count": null,
+      "outputs": []
+    },
+    {
+      "cell_type": "markdown",
+      "source": [
+        "2. enjoy.py parameters"
+      ],
+      "metadata": {
+        "id": "ao0nAh3MOdN7"
+      }
+    },
+    {
+      "cell_type": "code",
+      "source": [
+        "WANDB_RUN_PATH=\"sgoodfriend/rl-algo-impls-benchmarks/rd0lisee\""
+      ],
+      "metadata": {
+        "id": "jKL_NFhVOjSc"
+      },
+      "execution_count": 2,
+      "outputs": []
+    },
+    {
+      "cell_type": "markdown",
+      "source": [
+        "## Setup\n",
+        "Clone [sgoodfriend/rl-algo-impls](https://github.com/sgoodfriend/rl-algo-impls) "
+      ],
+      "metadata": {
+        "id": "bsG35Io0hmKG"
+      }
+    },
+    {
+      "cell_type": "code",
+      "source": [
+        "%%capture\n",
+        "!git clone https://github.com/sgoodfriend/rl-algo-impls.git"
+      ],
+      "metadata": {
+        "id": "k5ynTV25hdAf"
+      },
+      "execution_count": 3,
+      "outputs": []
+    },
+    {
+      "cell_type": "markdown",
+      "source": [
+        "Installing the correct packages:\n",
+        "\n",
+        "While conda and poetry are generally used for package management, the mismatch in Python versions (3.10 in the project file vs 3.8 in Colab) makes using the package yml files difficult to use. For now, instead I'm going to specify the list of requirements manually below:"
+      ],
+      "metadata": {
+        "id": "jKxGok-ElYQ7"
+      }
+    },
+    {
+      "cell_type": "code",
+      "source": [
+        "%%capture\n",
+        "!apt install python-opengl\n",
+        "!apt install ffmpeg\n",
+        "!apt install xvfb\n",
+        "!apt install swig"
+      ],
+      "metadata": {
+        "id": "nn6EETTc2Ewf"
+      },
+      "execution_count": 4,
+      "outputs": []
+    },
+    {
+      "cell_type": "code",
+      "source": [
+        "%%capture\n",
+        "%cd /content/rl-algo-impls\n",
+        "!pip install -r colab_requirements.txt"
+      ],
+      "metadata": {
+        "id": "AfZh9rH3yQii"
+      },
+      "execution_count": 5,
+      "outputs": []
+    },
+    {
+      "cell_type": "markdown",
+      "source": [
+        "## Run Once Per Runtime"
+      ],
+      "metadata": {
+        "id": "4o5HOLjc4wq7"
+      }
+    },
+    {
+      "cell_type": "code",
+      "source": [
+        "import wandb\n",
+        "wandb.login()"
+      ],
+      "metadata": {
+        "id": "PCXa5tdS2qFX"
+      },
+      "execution_count": null,
+      "outputs": []
+    },
+    {
+      "cell_type": "markdown",
+      "source": [
+        "## Restart Session beteween runs"
+      ],
+      "metadata": {
+        "id": "AZBZfSUV43JQ"
+      }
+    },
+    {
+      "cell_type": "code",
+      "source": [
+        "%%capture\n",
+        "from pyvirtualdisplay import Display\n",
+        "\n",
+        "virtual_display = Display(visible=0, size=(1400, 900))\n",
+        "virtual_display.start()"
+      ],
+      "metadata": {
+        "id": "VzemeQJP2NO9"
+      },
+      "execution_count": 7,
+      "outputs": []
+    },
+    {
+      "cell_type": "code",
+      "source": [
+        "%cd /content/rl-algo-impls\n",
+        "!python enjoy.py --wandb-run-path={WANDB_RUN_PATH}"
+      ],
+      "metadata": {
+        "id": "07aHYFH1zfXa"
+      },
+      "execution_count": null,
+      "outputs": []
+    }
+  ]
+}

colab_requirements.txt

@@ -0,0 +1,14 @@
+AutoROM.accept-rom-license >= 0.4.2, < 0.5
+stable-baselines3[extra] >= 1.7.0, < 1.8
+gym[box2d] >= 0.21.0, < 0.22
+pyglet == 1.5.27
+wandb >= 0.13.10, < 0.14
+pyvirtualdisplay == 3.0
+pybullet >= 3.2.5, < 3.3
+tabulate >= 0.9.0, < 0.10
+huggingface-hub >= 0.12.0, < 0.13
+numexpr >= 2.8.4, < 2.9
+gym3 >= 0.3.3, < 0.4
+glfw >= 1.12.0, < 1.13
+procgen >= 0.10.7, < 0.11
+ipython >= 8.10.0, < 8.11

colab_train.ipynb

@@ -0,0 +1,200 @@
+{
+  "nbformat": 4,
+  "nbformat_minor": 0,
+  "metadata": {
+    "colab": {
+      "provenance": [],
+      "machine_shape": "hm",
+      "authorship_tag": "ABX9TyMmemQnx6G7GOnn6XBdjgxY",
+      "include_colab_link": true
+    },
+    "kernelspec": {
+      "name": "python3",
+      "display_name": "Python 3"
+    },
+    "language_info": {
+      "name": "python"
+    },
+    "gpuClass": "standard",
+    "accelerator": "GPU"
+  },
+  "cells": [
+    {
+      "cell_type": "markdown",
+      "metadata": {
+        "id": "view-in-github",
+        "colab_type": "text"
+      },
+      "source": [
+        "<a href=\"https://colab.research.google.com/github/sgoodfriend/rl-algo-impls/blob/main/colab_train.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "source": [
+        "# [sgoodfriend/rl-algo-impls](https://github.com/sgoodfriend/rl-algo-impls) in Google Colaboratory\n",
+        "## Parameters\n",
+        "\n",
+        "\n",
+        "1.   Wandb\n",
+        "\n"
+      ],
+      "metadata": {
+        "id": "S-tXDWP8WTLc"
+      }
+    },
+    {
+      "cell_type": "code",
+      "source": [
+        "from getpass import getpass\n",
+        "import os\n",
+        "os.environ[\"WANDB_API_KEY\"] = getpass(\"Wandb API key to upload metrics, videos, and models: \")"
+      ],
+      "metadata": {
+        "id": "1ZtdYgxWNGwZ"
+      },
+      "execution_count": null,
+      "outputs": []
+    },
+    {
+      "cell_type": "markdown",
+      "source": [
+        "2. train run parameters"
+      ],
+      "metadata": {
+        "id": "ao0nAh3MOdN7"
+      }
+    },
+    {
+      "cell_type": "code",
+      "source": [
+        "ALGO = \"ppo\"\n",
+        "ENV = \"CartPole-v1\"\n",
+        "SEED = 1"
+      ],
+      "metadata": {
+        "id": "jKL_NFhVOjSc"
+      },
+      "execution_count": null,
+      "outputs": []
+    },
+    {
+      "cell_type": "markdown",
+      "source": [
+        "## Setup\n",
+        "Clone [sgoodfriend/rl-algo-impls](https://github.com/sgoodfriend/rl-algo-impls) "
+      ],
+      "metadata": {
+        "id": "bsG35Io0hmKG"
+      }
+    },
+    {
+      "cell_type": "code",
+      "source": [
+        "%%capture\n",
+        "!git clone https://github.com/sgoodfriend/rl-algo-impls.git"
+      ],
+      "metadata": {
+        "id": "k5ynTV25hdAf"
+      },
+      "execution_count": null,
+      "outputs": []
+    },
+    {
+      "cell_type": "markdown",
+      "source": [
+        "Installing the correct packages:\n",
+        "\n",
+        "While conda and poetry are generally used for package management, the mismatch in Python versions (3.10 in the project file vs 3.8 in Colab) makes using the package yml files difficult to use. For now, instead I'm going to specify the list of requirements manually below:"
+      ],
+      "metadata": {
+        "id": "jKxGok-ElYQ7"
+      }
+    },
+    {
+      "cell_type": "code",
+      "source": [
+        "%%capture\n",
+        "!apt install python-opengl\n",
+        "!apt install ffmpeg\n",
+        "!apt install xvfb\n",
+        "!apt install swig"
+      ],
+      "metadata": {
+        "id": "nn6EETTc2Ewf"
+      },
+      "execution_count": null,
+      "outputs": []
+    },
+    {
+      "cell_type": "code",
+      "source": [
+        "%%capture\n",
+        "%cd /content/rl-algo-impls\n",
+        "!pip install -r colab_requirements.txt"
+      ],
+      "metadata": {
+        "id": "AfZh9rH3yQii"
+      },
+      "execution_count": null,
+      "outputs": []
+    },
+    {
+      "cell_type": "markdown",
+      "source": [
+        "## Run Once Per Runtime"
+      ],
+      "metadata": {
+        "id": "4o5HOLjc4wq7"
+      }
+    },
+    {
+      "cell_type": "code",
+      "source": [
+        "import wandb\n",
+        "wandb.login()"
+      ],
+      "metadata": {
+        "id": "PCXa5tdS2qFX"
+      },
+      "execution_count": null,
+      "outputs": []
+    },
+    {
+      "cell_type": "markdown",
+      "source": [
+        "## Restart Session beteween runs"
+      ],
+      "metadata": {
+        "id": "AZBZfSUV43JQ"
+      }
+    },
+    {
+      "cell_type": "code",
+      "source": [
+        "%%capture\n",
+        "from pyvirtualdisplay import Display\n",
+        "\n",
+        "virtual_display = Display(visible=0, size=(1400, 900))\n",
+        "virtual_display.start()"
+      ],
+      "metadata": {
+        "id": "VzemeQJP2NO9"
+      },
+      "execution_count": null,
+      "outputs": []
+    },
+    {
+      "cell_type": "code",
+      "source": [
+        "%cd /content/rl-algo-impls\n",
+        "!python train.py --algo {ALGO} --env {ENV} --seed {SEED}"
+      ],
+      "metadata": {
+        "id": "07aHYFH1zfXa"
+      },
+      "execution_count": null,
+      "outputs": []
+    }
+  ]
+}

compare_runs.py

@@ -0,0 +1,187 @@
+import argparse
+import itertools
+import numpy as np
+import pandas as pd
+import wandb
+import wandb.apis.public
+
+from collections import defaultdict
+from dataclasses import dataclass
+from typing import Dict, Iterable, List, TypeVar
+
+from benchmark_publish import RunGroup
+
+
+@dataclass
+class Comparison:
+    control_values: List[float]
+    experiment_values: List[float]
+
+    def mean_diff_percentage(self) -> float:
+        return self._diff_percentage(
+            np.mean(self.control_values).item(), np.mean(self.experiment_values).item()
+        )
+
+    def median_diff_percentage(self) -> float:
+        return self._diff_percentage(
+            np.median(self.control_values).item(),
+            np.median(self.experiment_values).item(),
+        )
+
+    def _diff_percentage(self, c: float, e: float) -> float:
+        if c == e:
+            return 0
+        elif c == 0:
+            return float("inf") if e > 0 else float("-inf")
+        return 100 * (e - c) / c
+
+    def score(self) -> float:
+        return (
+            np.sum(
+                np.sign((self.mean_diff_percentage(), self.median_diff_percentage()))
+            ).item()
+            / 2
+        )
+
+
+RunGroupRunsSelf = TypeVar("RunGroupRunsSelf", bound="RunGroupRuns")
+
+
+class RunGroupRuns:
+    def __init__(
+        self,
+        run_group: RunGroup,
+        control: List[str],
+        experiment: List[str],
+        summary_stats: List[str] = ["best_eval", "eval", "train_rolling"],
+        summary_metrics: List[str] = ["mean", "result"],
+    ) -> None:
+        self.algo = run_group.algo
+        self.env = run_group.env_id
+        self.control = set(control)
+        self.experiment = set(experiment)
+
+        self.summary_stats = summary_stats
+        self.summary_metrics = summary_metrics
+
+        self.control_runs = []
+        self.experiment_runs = []
+
+    def add_run(self, run: wandb.apis.public.Run) -> None:
+        wandb_tags = set(run.config.get("wandb_tags", []))
+        if self.control & wandb_tags:
+            self.control_runs.append(run)
+        elif self.experiment & wandb_tags:
+            self.experiment_runs.append(run)
+
+    def comparisons_by_metric(self) -> Dict[str, Comparison]:
+        c_by_m = {}
+        for metric in (
+            f"{s}_{m}"
+            for s, m in itertools.product(self.summary_stats, self.summary_metrics)
+        ):
+            c_by_m[metric] = Comparison(
+                [c.summary[metric] for c in self.control_runs],
+                [e.summary[metric] for e in self.experiment_runs],
+            )
+        return c_by_m
+
+    @staticmethod
+    def data_frame(rows: Iterable[RunGroupRunsSelf]) -> pd.DataFrame:
+        results = defaultdict(list)
+        for r in rows:
+            if not r.control_runs or not r.experiment_runs:
+                continue
+            results["algo"].append(r.algo)
+            results["env"].append(r.env)
+            results["control"].append(r.control)
+            results["expierment"].append(r.experiment)
+            c_by_m = r.comparisons_by_metric()
+            results["score"].append(
+                sum(m.score() for m in c_by_m.values()) / len(c_by_m)
+            )
+            for m, c in c_by_m.items():
+                results[f"{m}_mean"].append(c.mean_diff_percentage())
+                results[f"{m}_median"].append(c.median_diff_percentage())
+        return pd.DataFrame(results)
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        "-p",
+        "--wandb-project-name",
+        type=str,
+        default="rl-algo-impls-benchmarks",
+        help="WandB project name to load runs from",
+    )
+    parser.add_argument(
+        "--wandb-entity",
+        type=str,
+        default=None,
+        help="WandB team. None uses default entity",
+    )
+    parser.add_argument(
+        "-n",
+        "--wandb-hostname-tag",
+        type=str,
+        nargs="*",
+        help="WandB tags for hostname (i.e. host_192-9-145-26)",
+    )
+    parser.add_argument(
+        "-c",
+        "--wandb-control-tag",
+        type=str,
+        nargs="+",
+        help="WandB tag for control commit (i.e. benchmark_5598ebc)",
+    )
+    parser.add_argument(
+        "-e",
+        "--wandb-experiment-tag",
+        type=str,
+        nargs="+",
+        help="WandB tag for experiment commit (i.e. benchmark_5540e1f)",
+    )
+    parser.add_argument(
+        "--exclude-envs",
+        type=str,
+        nargs="*",
+        help="Environments to exclude from comparison",
+    )
+    # parser.set_defaults(
+    #     wandb_hostname_tag=["host_150-230-44-105", "host_155-248-214-128"],
+    #     wandb_control_tag=["benchmark_fbc943f"],
+    #     wandb_experiment_tag=["benchmark_f59bf74"],
+    #     exclude_envs=[],
+    # )
+    args = parser.parse_args()
+    print(args)
+
+    api = wandb.Api()
+    all_runs = api.runs(
+        path=f"{args.wandb_entity or api.default_entity}/{args.wandb_project_name}",
+        order="+created_at",
+    )
+
+    runs_by_run_group: Dict[RunGroup, RunGroupRuns] = {}
+    wandb_hostname_tags = set(args.wandb_hostname_tag)
+    for r in all_runs:
+        if r.state != "finished":
+            continue
+        wandb_tags = set(r.config.get("wandb_tags", []))
+        if not wandb_tags or not wandb_hostname_tags & wandb_tags:
+            continue
+        rg = RunGroup(r.config["algo"], r.config.get("env_id") or r.config["env"])
+        if args.exclude_envs and rg.env_id in args.exclude_envs:
+            continue
+        if rg not in runs_by_run_group:
+            runs_by_run_group[rg] = RunGroupRuns(
+                rg,
+                args.wandb_control_tag,
+                args.wandb_experiment_tag,
+            )
+        runs_by_run_group[rg].add_run(r)
+    df = RunGroupRuns.data_frame(runs_by_run_group.values()).round(decimals=2)
+    print(f"**Total Score: {sum(df.score)}**")
+    df.loc["mean"] = df.mean(numeric_only=True)
+    print(df.to_markdown())

dqn/dqn.py

@@ -0,0 +1,182 @@
+import copy
+import numpy as np
+import random
+import torch
+import torch.nn as nn
+import torch.nn.functional as F
+
+from collections import deque
+from torch.optim import Adam
+from stable_baselines3.common.vec_env.base_vec_env import VecEnv, VecEnvObs
+from torch.utils.tensorboard.writer import SummaryWriter
+from typing import List, NamedTuple, Optional, TypeVar
+
+from dqn.policy import DQNPolicy
+from shared.algorithm import Algorithm
+from shared.callbacks.callback import Callback
+from shared.schedule import linear_schedule
+
+
+class Transition(NamedTuple):
+    obs: np.ndarray
+    action: np.ndarray
+    reward: float
+    done: bool
+    next_obs: np.ndarray
+
+
+class Batch(NamedTuple):
+    obs: np.ndarray
+    actions: np.ndarray
+    rewards: np.ndarray
+    dones: np.ndarray
+    next_obs: np.ndarray
+
+
+class ReplayBuffer:
+    def __init__(self, num_envs: int, maxlen: int) -> None:
+        self.num_envs = num_envs
+        self.buffer = deque(maxlen=maxlen)
+
+    def add(
+        self,
+        obs: VecEnvObs,
+        action: np.ndarray,
+        reward: np.ndarray,
+        done: np.ndarray,
+        next_obs: VecEnvObs,
+    ) -> None:
+        assert isinstance(obs, np.ndarray)
+        assert isinstance(next_obs, np.ndarray)
+        for i in range(self.num_envs):
+            self.buffer.append(
+                Transition(obs[i], action[i], reward[i], done[i], next_obs[i])
+            )
+
+    def sample(self, batch_size: int) -> Batch:
+        ts = random.sample(self.buffer, batch_size)
+        return Batch(
+            obs=np.array([t.obs for t in ts]),
+            actions=np.array([t.action for t in ts]),
+            rewards=np.array([t.reward for t in ts]),
+            dones=np.array([t.done for t in ts]),
+            next_obs=np.array([t.next_obs for t in ts]),
+        )
+
+    def __len__(self) -> int:
+        return len(self.buffer)
+
+
+DQNSelf = TypeVar("DQNSelf", bound="DQN")
+
+
+class DQN(Algorithm):
+    def __init__(
+        self,
+        policy: DQNPolicy,
+        env: VecEnv,
+        device: torch.device,
+        tb_writer: SummaryWriter,
+        learning_rate: float = 1e-4,
+        buffer_size: int = 1_000_000,
+        learning_starts: int = 50_000,
+        batch_size: int = 32,
+        tau: float = 1.0,
+        gamma: float = 0.99,
+        train_freq: int = 4,
+        gradient_steps: int = 1,
+        target_update_interval: int = 10_000,
+        exploration_fraction: float = 0.1,
+        exploration_initial_eps: float = 1.0,
+        exploration_final_eps: float = 0.05,
+        max_grad_norm: float = 10.0,
+    ) -> None:
+        super().__init__(policy, env, device, tb_writer)
+        self.policy = policy
+
+        self.optimizer = Adam(self.policy.q_net.parameters(), lr=learning_rate)
+
+        self.target_q_net = copy.deepcopy(self.policy.q_net).to(self.device)
+        self.target_q_net.train(False)
+        self.tau = tau
+        self.target_update_interval = target_update_interval
+
+        self.replay_buffer = ReplayBuffer(self.env.num_envs, buffer_size)
+        self.batch_size = batch_size
+
+        self.learning_starts = learning_starts
+        self.train_freq = train_freq
+        self.gradient_steps = gradient_steps
+
+        self.gamma = gamma
+        self.exploration_eps_schedule = linear_schedule(
+            exploration_initial_eps,
+            exploration_final_eps,
+            end_fraction=exploration_fraction,
+        )
+
+        self.max_grad_norm = max_grad_norm
+
+    def learn(
+        self: DQNSelf, total_timesteps: int, callback: Optional[Callback] = None
+    ) -> DQNSelf:
+        self.policy.train(True)
+        obs = self.env.reset()
+        obs = self._collect_rollout(self.learning_starts, obs, 1)
+        learning_steps = total_timesteps - self.learning_starts
+        timesteps_elapsed = 0
+        steps_since_target_update = 0
+        while timesteps_elapsed < learning_steps:
+            progress = timesteps_elapsed / learning_steps
+            eps = self.exploration_eps_schedule(progress)
+            obs = self._collect_rollout(self.train_freq, obs, eps)
+            rollout_steps = self.train_freq
+            timesteps_elapsed += rollout_steps
+            for _ in range(
+                self.gradient_steps if self.gradient_steps > 0 else self.train_freq
+            ):
+                self.train()
+            steps_since_target_update += rollout_steps
+            if steps_since_target_update >= self.target_update_interval:
+                self._update_target()
+                steps_since_target_update = 0
+            if callback:
+                callback.on_step(timesteps_elapsed=rollout_steps)
+        return self
+
+    def train(self) -> None:
+        if len(self.replay_buffer) < self.batch_size:
+            return
+        o, a, r, d, next_o = self.replay_buffer.sample(self.batch_size)
+        o = torch.as_tensor(o, device=self.device)
+        a = torch.as_tensor(a, device=self.device).unsqueeze(1)
+        r = torch.as_tensor(r, dtype=torch.float32, device=self.device)
+        d = torch.as_tensor(d, dtype=torch.long, device=self.device)
+        next_o = torch.as_tensor(next_o, device=self.device)
+
+        with torch.no_grad():
+            target = r + (1 - d) * self.gamma * self.target_q_net(next_o).max(1).values
+        current = self.policy.q_net(o).gather(dim=1, index=a).squeeze(1)
+        loss = F.smooth_l1_loss(current, target)
+
+        self.optimizer.zero_grad()
+        loss.backward()
+        if self.max_grad_norm:
+            nn.utils.clip_grad_norm_(self.policy.q_net.parameters(), self.max_grad_norm)
+        self.optimizer.step()
+
+    def _collect_rollout(self, timesteps: int, obs: VecEnvObs, eps: float) -> VecEnvObs:
+        for _ in range(0, timesteps, self.env.num_envs):
+            action = self.policy.act(obs, eps, deterministic=False)
+            next_obs, reward, done, _ = self.env.step(action)
+            self.replay_buffer.add(obs, action, reward, done, next_obs)
+            obs = next_obs
+        return obs
+
+    def _update_target(self) -> None:
+        for target_param, param in zip(
+            self.target_q_net.parameters(), self.policy.q_net.parameters()
+        ):
+            target_param.data.copy_(
+                self.tau * param.data + (1 - self.tau) * target_param.data
+            )

dqn/policy.py

@@ -0,0 +1,35 @@
+import numpy as np
+import os
+import torch
+
+from stable_baselines3.common.vec_env.base_vec_env import VecEnv, VecEnvObs
+from typing import Sequence, TypeVar
+
+from dqn.q_net import QNetwork
+from shared.policy.policy import Policy
+
+DQNPolicySelf = TypeVar("DQNPolicySelf", bound="DQNPolicy")
+
+
+class DQNPolicy(Policy):
+    def __init__(
+        self,
+        env: VecEnv,
+        hidden_sizes: Sequence[int] = [],
+        **kwargs,
+    ) -> None:
+        super().__init__(env, **kwargs)
+        self.q_net = QNetwork(env.observation_space, env.action_space, hidden_sizes)
+
+    def act(
+        self, obs: VecEnvObs, eps: float = 0, deterministic: bool = True
+    ) -> np.ndarray:
+        assert eps == 0 if deterministic else eps >= 0
+        if not deterministic and np.random.random() < eps:
+            return np.array(
+                [self.env.action_space.sample() for _ in range(self.env.num_envs)]
+            )
+        else:
+            o = self._as_tensor(obs)
+            with torch.no_grad():
+                return self.q_net(o).argmax(axis=1).cpu().numpy()

dqn/q_net.py

@@ -0,0 +1,30 @@
+import gym
+import torch as th
+import torch.nn as nn
+
+from gym.spaces import Discrete
+from typing import Sequence, Type
+
+from shared.module.feature_extractor import FeatureExtractor
+from shared.module.module import mlp
+
+
+class QNetwork(nn.Module):
+    def __init__(
+        self,
+        observation_space: gym.Space,
+        action_space: gym.Space,
+        hidden_sizes: Sequence[int] = [],
+        activation: Type[nn.Module] = nn.ReLU,  # Used by stable-baselines3
+    ) -> None:
+        super().__init__()
+        assert isinstance(action_space, Discrete)
+        self._feature_extractor = FeatureExtractor(observation_space, activation)
+        layer_sizes = (
+            (self._feature_extractor.out_dim,) + tuple(hidden_sizes) + (action_space.n,)
+        )
+        self._fc = mlp(layer_sizes, activation)
+
+    def forward(self, obs: th.Tensor) -> th.Tensor:
+        x = self._feature_extractor(obs)
+        return self._fc(x)

enjoy.py

@@ -0,0 +1,30 @@
+# Support for PyTorch mps mode (https://pytorch.org/docs/stable/notes/mps.html)
+import os
+
+os.environ["PYTORCH_ENABLE_MPS_FALLBACK"] = "1"
+
+from runner.evaluate import EvalArgs, evaluate_model
+from runner.running_utils import base_parser
+
+
+if __name__ == "__main__":
+    parser = base_parser(multiple=False)
+    parser.add_argument("--render", default=True, type=bool)
+    parser.add_argument("--best", default=True, type=bool)
+    parser.add_argument("--n_envs", default=1, type=int)
+    parser.add_argument("--n_episodes", default=3, type=int)
+    parser.add_argument("--deterministic-eval", default=None, type=bool)
+    parser.add_argument(
+        "--no-print-returns", action="store_true", help="Limit printing"
+    )
+    # wandb-run-path overrides base RunArgs
+    parser.add_argument("--wandb-run-path", default=None, type=str)
+    parser.set_defaults(
+        algo=["ppo"],
+    )
+    args = parser.parse_args()
+    args.algo = args.algo[0]
+    args.env = args.env[0]
+    args = EvalArgs(**vars(args))
+
+    evaluate_model(args, os.path.dirname(__file__))

environment.yml

@@ -0,0 +1,17 @@
+name: rl_algo_impls
+channels:
+  - pytorch
+  - conda-forge
+  - nodefaults
+dependencies:
+  - python=3.10.*
+  - mamba
+  - pip
+  - poetry
+  - pytorch
+  - torchvision
+  - torchaudio
+  - cmake
+  - swig
+  - ipywidgets
+  - black

huggingface_publish.py

@@ -0,0 +1,189 @@
+import os
+
+os.environ["PYTORCH_ENABLE_MPS_FALLBACK"] = "1"
+
+import argparse
+import requests
+import shutil
+import subprocess
+import tempfile
+import wandb
+import wandb.apis.public
+
+from typing import List, Optional
+
+from huggingface_hub.hf_api import HfApi, upload_folder
+from huggingface_hub.repocard import metadata_save
+from pyvirtualdisplay.display import Display
+
+from publish.markdown_format import EvalTableData, model_card_text
+from runner.config import EnvHyperparams
+from runner.evaluate import EvalArgs, evaluate_model
+from runner.env import make_eval_env
+from shared.callbacks.eval_callback import evaluate
+from wrappers.vec_episode_recorder import VecEpisodeRecorder
+
+
+def publish(
+    wandb_run_paths: List[str],
+    wandb_report_url: str,
+    huggingface_user: Optional[str] = None,
+    huggingface_token: Optional[str] = None,
+    virtual_display: bool = False,
+) -> None:
+    if virtual_display:
+        display = Display(visible=False, size=(1400, 900))
+        display.start()
+
+    api = wandb.Api()
+    runs = [api.run(rp) for rp in wandb_run_paths]
+    algo = runs[0].config["algo"]
+    hyperparam_id = runs[0].config["env"]
+    evaluations = [
+        evaluate_model(
+            EvalArgs(
+                algo,
+                hyperparam_id,
+                seed=r.config.get("seed", None),
+                render=False,
+                best=True,
+                n_envs=None,
+                n_episodes=10,
+                no_print_returns=True,
+                wandb_run_path="/".join(r.path),
+            ),
+            os.path.dirname(__file__),
+        )
+        for r in runs
+    ]
+    run_metadata = requests.get(runs[0].file("wandb-metadata.json").url).json()
+    table_data = list(EvalTableData(r, e) for r, e in zip(runs, evaluations))
+    best_eval = sorted(
+        table_data, key=lambda d: d.evaluation.stats.score, reverse=True
+    )[0]
+
+    with tempfile.TemporaryDirectory() as tmpdirname:
+        _, (policy, stats, config) = best_eval
+
+        repo_name = config.model_name(include_seed=False)
+        repo_dir_path = os.path.join(tmpdirname, repo_name)
+        # Locally clone this repo to a temp directory
+        subprocess.run(["git", "clone", ".", repo_dir_path])
+        shutil.rmtree(os.path.join(repo_dir_path, ".git"))
+        model_path = config.model_dir_path(best=True, downloaded=True)
+        shutil.copytree(
+            model_path,
+            os.path.join(
+                repo_dir_path, "saved_models", config.model_dir_name(best=True)
+            ),
+        )
+
+        github_url = "https://github.com/sgoodfriend/rl-algo-impls"
+        commit_hash = run_metadata.get("git", {}).get("commit", None)
+        env_id = runs[0].config.get("env_id") or runs[0].config["env"]
+        card_text = model_card_text(
+            algo,
+            env_id,
+            github_url,
+            commit_hash,
+            wandb_report_url,
+            table_data,
+            best_eval,
+        )
+        readme_filepath = os.path.join(repo_dir_path, "README.md")
+        os.remove(readme_filepath)
+        with open(readme_filepath, "w") as f:
+            f.write(card_text)
+
+        metadata = {
+            "library_name": "rl-algo-impls",
+            "tags": [
+                env_id,
+                algo,
+                "deep-reinforcement-learning",
+                "reinforcement-learning",
+            ],
+            "model-index": [
+                {
+                    "name": algo,
+                    "results": [
+                        {
+                            "metrics": [
+                                {
+                                    "type": "mean_reward",
+                                    "value": str(stats.score),
+                                    "name": "mean_reward",
+                                }
+                            ],
+                            "task": {
+                                "type": "reinforcement-learning",
+                                "name": "reinforcement-learning",
+                            },
+                            "dataset": {
+                                "name": env_id,
+                                "type": env_id,
+                            },
+                        }
+                    ],
+                }
+            ],
+        }
+        metadata_save(readme_filepath, metadata)
+
+        video_env = VecEpisodeRecorder(
+            make_eval_env(
+                config,
+                EnvHyperparams(**config.env_hyperparams),
+                override_n_envs=1,
+                normalize_load_path=model_path,
+            ),
+            os.path.join(repo_dir_path, "replay"),
+            max_video_length=3600,
+        )
+        evaluate(
+            video_env,
+            policy,
+            1,
+            deterministic=config.eval_params.get("deterministic", True),
+        )
+
+        api = HfApi()
+        huggingface_user = huggingface_user or api.whoami()["name"]
+        huggingface_repo = f"{huggingface_user}/{repo_name}"
+        api.create_repo(
+            token=huggingface_token,
+            repo_id=huggingface_repo,
+            private=False,
+            exist_ok=True,
+        )
+        repo_url = upload_folder(
+            repo_id=huggingface_repo,
+            folder_path=repo_dir_path,
+            path_in_repo="",
+            commit_message=f"{algo.upper()} playing {env_id} from {github_url}/tree/{commit_hash}",
+            token=huggingface_token,
+        )
+        print(f"Pushed model to the hub: {repo_url}")
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        "--wandb-run-paths",
+        type=str,
+        nargs="+",
+        help="Run paths of the form entity/project/run_id",
+    )
+    parser.add_argument("--wandb-report-url", type=str, help="Link to WandB report")
+    parser.add_argument(
+        "--huggingface-user",
+        type=str,
+        help="Huggingface user or team to upload model cards",
+        default=None,
+    )
+    parser.add_argument(
+        "--virtual-display", action="store_true", help="Use headless virtual display"
+    )
+    args = parser.parse_args()
+    print(args)
+    publish(**vars(args))

hyperparams/dqn.yml

@@ -0,0 +1,105 @@
+CartPole-v1: &cartpole-defaults
+  n_timesteps: !!float 5e4
+  env_hyperparams:
+    rolling_length: 50
+  policy_hyperparams:
+    hidden_sizes: [256, 256]
+  algo_hyperparams:
+    learning_rate: !!float 2.3e-3
+    batch_size: 64
+    buffer_size: 100000
+    learning_starts: 1000
+    gamma: 0.99
+    target_update_interval: 10
+    train_freq: 256
+    gradient_steps: 128
+    exploration_fraction: 0.16
+    exploration_final_eps: 0.04
+  eval_params:
+    step_freq: !!float 1e4
+
+CartPole-v0:
+  <<: *cartpole-defaults
+  n_timesteps: !!float 4e4
+
+MountainCar-v0:
+  n_timesteps: !!float 1.2e5
+  env_hyperparams:
+    rolling_length: 50
+  policy_hyperparams:
+    hidden_sizes: [256, 256]
+  algo_hyperparams:
+    learning_rate: !!float 4e-3
+    batch_size: 128
+    buffer_size: 10000
+    learning_starts: 1000
+    gamma: 0.98
+    target_update_interval: 600
+    train_freq: 16
+    gradient_steps: 8
+    exploration_fraction: 0.2
+    exploration_final_eps: 0.07
+
+Acrobot-v1:
+  n_timesteps: !!float 1e5
+  env_hyperparams:
+    rolling_length: 50
+  policy_hyperparams:
+    hidden_sizes: [256, 256]
+  algo_hyperparams:
+    learning_rate: !!float 6.3e-4
+    batch_size: 128
+    buffer_size: 50000
+    learning_starts: 0
+    gamma: 0.99
+    target_update_interval: 250
+    train_freq: 4
+    gradient_steps: -1
+    exploration_fraction: 0.12
+    exploration_final_eps: 0.1
+
+LunarLander-v2:
+  n_timesteps: !!float 5e5
+  env_hyperparams:
+    rolling_length: 50
+  policy_hyperparams:
+    hidden_sizes: [256, 256]
+  algo_hyperparams:
+    learning_rate: !!float 1e-4
+    batch_size: 256
+    buffer_size: 100000
+    learning_starts: 10000
+    gamma: 0.99
+    target_update_interval: 250
+    train_freq: 8
+    gradient_steps: -1
+    exploration_fraction: 0.12
+    exploration_final_eps: 0.1
+    max_grad_norm: 0.5
+  eval_params:
+    step_freq: 25_000
+
+_atari: &atari-defaults
+  n_timesteps: !!float 1e7
+  env_hyperparams:
+    frame_stack: 4
+    no_reward_timeout_steps: 1_000
+    no_reward_fire_steps: 500
+    n_envs: 8
+    vec_env_class: "subproc"
+  algo_hyperparams:
+    buffer_size: 100000
+    learning_rate: !!float 1e-4
+    batch_size: 32
+    learning_starts: 100000
+    target_update_interval: 1000
+    train_freq: 8
+    gradient_steps: 2
+    exploration_fraction: 0.1
+    exploration_final_eps: 0.01
+  eval_params:
+    deterministic: false
+
+PongNoFrameskip-v4:
+  <<: *atari-defaults
+  n_timesteps: !!float 2.5e6

hyperparams/ppo.yml

@@ -0,0 +1,296 @@
+CartPole-v1: &cartpole-defaults
+  n_timesteps: !!float 1e5
+  env_hyperparams:
+    n_envs: 8
+  algo_hyperparams:
+    n_steps: 32
+    batch_size: 256
+    n_epochs: 20
+    gae_lambda: 0.8
+    gamma: 0.98
+    ent_coef: 0.0
+    learning_rate: 0.001
+    learning_rate_decay: linear
+    clip_range: 0.2
+    clip_range_decay: linear
+  eval_params:
+    step_freq: !!float 2.5e4
+
+CartPole-v0:
+  <<: *cartpole-defaults
+  n_timesteps: !!float 5e4
+
+MountainCar-v0:
+  n_timesteps: !!float 1e6
+  env_hyperparams:
+    normalize: true
+    n_envs: 16
+  algo_hyperparams:
+    n_steps: 16
+    n_epochs: 4
+    gae_lambda: 0.98
+    gamma: 0.99
+    ent_coef: 0.0
+
+MountainCarContinuous-v0:
+  n_timesteps: !!float 1e5
+  env_hyperparams:
+    normalize: true
+    n_envs: 4
+  # policy_hyperparams:
+  #   init_layers_orthogonal: false
+  #   log_std_init: -3.29
+  #   use_sde: true
+  algo_hyperparams:
+    n_steps: 512
+    batch_size: 256
+    n_epochs: 10
+    learning_rate: !!float 7.77e-5
+    ent_coef: 0.01 # 0.00429
+    ent_coef_decay: linear
+    clip_range: 0.1
+    gae_lambda: 0.9
+    max_grad_norm: 5
+    vf_coef: 0.19
+  eval_params:
+    step_freq: 5000
+
+Acrobot-v1:
+  n_timesteps: !!float 1e6
+  env_hyperparams:
+    n_envs: 16
+    normalize: true
+  algo_hyperparams:
+    n_steps: 256
+    n_epochs: 4
+    gae_lambda: 0.94
+    gamma: 0.99
+    ent_coef: 0.0
+
+LunarLander-v2:
+  n_timesteps: !!float 1e6
+  env_hyperparams:
+    n_envs: 16
+  algo_hyperparams:
+    n_steps: 1024
+    batch_size: 64
+    n_epochs: 4
+    gae_lambda: 0.98
+    gamma: 0.999
+    ent_coef: 0.01
+    ent_coef_decay: linear
+    normalize_advantage: false
+
+CarRacing-v0: &carracing-defaults
+  n_timesteps: !!float 4e6
+  env_hyperparams:
+    n_envs: 8
+    frame_stack: 4
+  policy_hyperparams: &carracing-policy-defaults
+    use_sde: true
+    log_std_init: -2
+    init_layers_orthogonal: false
+    activation_fn: relu
+    share_features_extractor: false
+    cnn_feature_dim: 256
+    hidden_sizes: [256]
+  algo_hyperparams:
+    n_steps: 512
+    batch_size: 128
+    n_epochs: 10
+    learning_rate: !!float 1e-4
+    learning_rate_decay: linear
+    gamma: 0.99
+    gae_lambda: 0.95
+    ent_coef: 0.0
+    sde_sample_freq: 4
+    max_grad_norm: 0.5
+    vf_coef: 0.5
+    clip_range: 0.2
+
+impala-CarRacing-v0:
+  <<: *carracing-defaults
+  env_id: CarRacing-v0
+  policy_hyperparams:
+    <<: *carracing-policy-defaults
+    cnn_style: impala
+    init_layers_orthogonal: true
+    cnn_layers_init_orthogonal: false
+    hidden_sizes: []
+
+# BreakoutNoFrameskip-v4
+# PongNoFrameskip-v4
+# SpaceInvadersNoFrameskip-v4
+# QbertNoFrameskip-v4
+_atari: &atari-defaults
+  n_timesteps: !!float 1e7
+  env_hyperparams: &atari-env-defaults
+    n_envs: 8
+    frame_stack: 4
+    no_reward_timeout_steps: 1000
+    no_reward_fire_steps: 500
+    vec_env_class: subproc
+  policy_hyperparams: &atari-policy-defaults
+    activation_fn: relu
+  algo_hyperparams:
+    n_steps: 128
+    batch_size: 256
+    n_epochs: 4
+    learning_rate: !!float 2.5e-4
+    learning_rate_decay: linear
+    clip_range: 0.1
+    clip_range_decay: linear
+    vf_coef: 0.5
+    ent_coef: 0.01
+  eval_params:
+    deterministic: false
+
+debug-PongNoFrameskip-v4:
+  <<: *atari-defaults
+  device: cpu
+  env_id: PongNoFrameskip-v4
+  env_hyperparams:
+    <<: *atari-env-defaults
+    vec_env_class: dummy
+
+_impala-atari: &impala-atari-defaults
+  <<: *atari-defaults
+  policy_hyperparams:
+    <<: *atari-policy-defaults
+    cnn_style: impala
+    cnn_feature_dim: 256
+    init_layers_orthogonal: true
+    cnn_layers_init_orthogonal: false
+
+impala-PongNoFrameskip-v4:
+  <<: *impala-atari-defaults
+  env_id: PongNoFrameskip-v4
+
+impala-BreakoutNoFrameskip-v4:
+  <<: *impala-atari-defaults
+  env_id: BreakoutNoFrameskip-v4
+
+impala-SpaceInvadersNoFrameskip-v4:
+  <<: *impala-atari-defaults
+  env_id: SpaceInvadersNoFrameskip-v4
+
+impala-QbertNoFrameskip-v4:
+  <<: *impala-atari-defaults
+  env_id: QbertNoFrameskip-v4
+
+HalfCheetahBulletEnv-v0: &pybullet-defaults
+  n_timesteps: !!float 2e6
+  env_hyperparams: &pybullet-env-defaults
+    n_envs: 16
+    normalize: true
+  policy_hyperparams: &pybullet-policy-defaults
+    pi_hidden_sizes: [256, 256]
+    v_hidden_sizes: [256, 256]
+    activation_fn: relu
+  algo_hyperparams: &pybullet-algo-defaults
+    n_steps: 512
+    batch_size: 128
+    n_epochs: 20
+    gamma: 0.99
+    gae_lambda: 0.9
+    ent_coef: 0.0
+    max_grad_norm: 0.5
+    vf_coef: 0.5
+    learning_rate: !!float 3e-5
+    clip_range: 0.4
+
+AntBulletEnv-v0:
+  <<: *pybullet-defaults
+  policy_hyperparams:
+    <<: *pybullet-policy-defaults
+  algo_hyperparams:
+    <<: *pybullet-algo-defaults
+
+Walker2DBulletEnv-v0:
+  <<: *pybullet-defaults
+  algo_hyperparams:
+    <<: *pybullet-algo-defaults
+    clip_range_decay: linear
+
+HopperBulletEnv-v0:
+  <<: *pybullet-defaults
+  algo_hyperparams:
+    <<: *pybullet-algo-defaults
+    clip_range_decay: linear
+
+HumanoidBulletEnv-v0:
+  <<: *pybullet-defaults
+  n_timesteps: !!float 1e7
+  env_hyperparams:
+    <<: *pybullet-env-defaults
+    n_envs: 8
+  policy_hyperparams:
+    <<: *pybullet-policy-defaults
+    # log_std_init: -1
+  algo_hyperparams:
+    <<: *pybullet-algo-defaults
+    n_steps: 2048
+    batch_size: 64
+    n_epochs: 10
+    gae_lambda: 0.95
+    learning_rate: !!float 2.5e-4
+    clip_range: 0.2
+
+_procgen: &procgen-defaults
+  env_hyperparams: &procgen-env-defaults
+    is_procgen: true
+    n_envs: 64
+    # grayscale: false
+    # frame_stack: 4
+    normalize: true # procgen only normalizes reward
+  policy_hyperparams:
+    activation_fn: relu
+    cnn_style: impala
+    cnn_feature_dim: 256
+    init_layers_orthogonal: true
+    cnn_layers_init_orthogonal: false
+  algo_hyperparams:
+    gamma: 0.999
+    gae_lambda: 0.95
+    n_steps: 256
+    batch_size: 2048
+    n_epochs: 3
+    ent_coef: 0.01
+    clip_range: 0.2
+    # clip_range_decay: linear
+    clip_range_vf: 0.2
+    learning_rate: !!float 5e-4
+    # learning_rate_decay: linear
+    vf_coef: 0.5
+  eval_params:
+    deterministic: false
+    ignore_first_episode: true
+    step_freq: !!float 1e5
+
+_procgen-easy: &procgen-easy-defaults
+  <<: *procgen-defaults
+  n_timesteps: !!float 25e6
+  env_hyperparams: &procgen-easy-env-defaults
+    <<: *procgen-env-defaults
+    make_kwargs:
+      distribution_mode: easy
+
+procgen-coinrun-easy: &coinrun-easy-defaults
+  <<: *procgen-easy-defaults
+  env_id: coinrun
+
+debug-procgen-coinrun:
+  <<: *coinrun-easy-defaults
+  device: cpu
+
+procgen-starpilot-easy:
+  <<: *procgen-easy-defaults
+  env_id: starpilot
+
+procgen-bossfight-easy:
+  <<: *procgen-easy-defaults
+  env_id: bossfight
+
+procgen-bigfish-easy:
+  <<: *procgen-easy-defaults
+  env_id: bigfish

hyperparams/vpg.yml

@@ -0,0 +1,174 @@
+CartPole-v1: &cartpole-defaults
+  n_timesteps: !!float 4e5
+  algo_hyperparams:
+    n_steps: 4096
+    pi_lr: 0.01
+    gamma: 0.99
+    gae_lambda: 1
+    val_lr: 0.01
+    train_v_iters: 80
+  eval_params:
+    step_freq: !!float 2.5e4
+
+CartPole-v0:
+  <<: *cartpole-defaults
+  n_timesteps: !!float 1e5
+  algo_hyperparams:
+    n_steps: 1024
+    pi_lr: 0.01
+    gamma: 0.99
+    gae_lambda: 1
+    val_lr: 0.01
+    train_v_iters: 80
+
+MountainCar-v0:
+  n_timesteps: !!float 1e6
+  env_hyperparams:
+    normalize: true
+    n_envs: 16
+  algo_hyperparams:
+    n_steps: 200
+    pi_lr: 0.005
+    gamma: 0.99
+    gae_lambda: 0.97
+    val_lr: 0.01
+    train_v_iters: 80
+    max_grad_norm: 0.5
+
+MountainCarContinuous-v0:
+  n_timesteps: !!float 3e5
+  env_hyperparams:
+    normalize: true
+    n_envs: 4
+  # policy_hyperparams:
+  #   init_layers_orthogonal: false
+  #   log_std_init: -3.29
+  #   use_sde: true
+  algo_hyperparams:
+    n_steps: 1000
+    pi_lr: !!float 5e-4
+    gamma: 0.99
+    gae_lambda: 0.9
+    val_lr: !!float 1e-3
+    train_v_iters: 80
+    max_grad_norm: 5
+  eval_params:
+    step_freq: 5000
+
+Acrobot-v1:
+  n_timesteps: !!float 2e5
+  algo_hyperparams:
+    n_steps: 2048
+    pi_lr: 0.005
+    gamma: 0.99
+    gae_lambda: 0.97
+    val_lr: 0.01
+    train_v_iters: 80
+    max_grad_norm: 0.5
+
+LunarLander-v2:
+  n_timesteps: !!float 4e6
+  policy_hyperparams:
+    hidden_sizes: [256, 256]
+  algo_hyperparams:
+    n_steps: 2048
+    pi_lr: 0.0001
+    gamma: 0.999
+    gae_lambda: 0.97
+    val_lr: 0.0001
+    train_v_iters: 80
+    max_grad_norm: 0.5
+  eval_params:
+    deterministic: false
+
+CarRacing-v0:
+  n_timesteps: !!float 4e6
+  env_hyperparams:
+    frame_stack: 4
+    n_envs: 4
+    vec_env_class: "dummy"
+  policy_hyperparams:
+    use_sde: true
+    log_std_init: -2
+    init_layers_orthogonal: false
+    activation_fn: relu
+    cnn_feature_dim: 256
+    hidden_sizes: [256]
+  algo_hyperparams:
+    n_steps: 1000
+    pi_lr: !!float 5e-5
+    gamma: 0.99
+    gae_lambda: 0.95
+    val_lr: !!float 1e-4
+    train_v_iters: 40
+    max_grad_norm: 0.5
+    sde_sample_freq: 4
+
+HalfCheetahBulletEnv-v0: &pybullet-defaults
+  n_timesteps: !!float 2e6
+  policy_hyperparams: &pybullet-policy-defaults
+    hidden_sizes: [256, 256]
+  algo_hyperparams: &pybullet-algo-defaults
+    n_steps: 4000
+    pi_lr: !!float 3e-4
+    gamma: 0.99
+    gae_lambda: 0.97
+    val_lr: !!float 1e-3
+    train_v_iters: 80
+    max_grad_norm: 0.5
+
+AntBulletEnv-v0:
+  <<: *pybullet-defaults
+  policy_hyperparams:
+    <<: *pybullet-policy-defaults
+    hidden_sizes: [400, 300]
+  algo_hyperparams:
+    <<: *pybullet-algo-defaults
+    pi_lr: !!float 7e-4
+    val_lr: !!float 7e-3
+
+HopperBulletEnv-v0:
+  <<: *pybullet-defaults
+
+Walker2DBulletEnv-v0:
+  <<: *pybullet-defaults
+
+FrozenLake-v1:
+  n_timesteps: !!float 8e5
+  env_params:
+    make_kwargs:
+      map_name: 8x8
+      is_slippery: true
+  policy_hyperparams:
+    hidden_sizes: [64]
+  algo_hyperparams:
+    n_steps: 2048
+    pi_lr: 0.01
+    gamma: 0.99
+    gae_lambda: 0.98
+    val_lr: 0.01
+    train_v_iters: 80
+    max_grad_norm: 0.5
+  eval_params:
+    step_freq: !!float 5e4
+    n_episodes: 10
+    save_best: true
+
+_atari: &atari-defaults
+  n_timesteps: !!float 1e7
+  env_hyperparams:
+    frame_stack: 4
+    no_reward_timeout_steps: 1000
+    no_reward_fire_steps: 500
+  # policy_hyperparams:
+  #   hidden_sizes: [256, 256]
+  algo_hyperparams:
+    n_steps: 4096
+    pi_lr: !!float 1e-4
+    gamma: 0.99
+    gae_lambda: 0.95
+    val_lr: !!float 2e-4
+    train_v_iters: 80
+    max_grad_norm: 0.5
+  eval_params:
+    deterministic: false

lambda_labs/benchmark.sh

@@ -0,0 +1,32 @@
+source benchmarks/train_loop.sh
+
+# export WANDB_PROJECT_NAME="rl-algo-impls"
+
+BENCHMARK_MAX_PROCS="${BENCHMARK_MAX_PROCS:-6}"
+
+ALGOS=(
+    # "vpg"
+    # "dqn"
+    "ppo"
+)
+ENVS=(
+    # Basic
+    "CartPole-v1"
+    "MountainCar-v0"
+    "MountainCarContinuous-v0"
+    "Acrobot-v1"
+    "LunarLander-v2"
+    # PyBullet
+    "HalfCheetahBulletEnv-v0"
+    "AntBulletEnv-v0"
+    "HopperBulletEnv-v0"
+    "Walker2DBulletEnv-v0"
+    # CarRacing
+    "CarRacing-v0"
+    # Atari
+    "PongNoFrameskip-v4"
+    "BreakoutNoFrameskip-v4"
+    "SpaceInvadersNoFrameskip-v4"
+    "QbertNoFrameskip-v4"
+)
+train_loop "${ALGOS[*]}" "${ENVS[*]}" | xargs -I CMD -P $BENCHMARK_MAX_PROCS bash -c CMD

lambda_labs/impala_atari_benchmark.sh

@@ -0,0 +1,19 @@
+source benchmarks/train_loop.sh
+
+# export WANDB_PROJECT_NAME="rl-algo-impls"
+
+BENCHMARK_MAX_PROCS="${BENCHMARK_MAX_PROCS:-5}"
+
+ALGOS=(
+    # "vpg"
+    # "dqn"
+    "ppo"
+)
+ENVS=(
+    "impala-PongNoFrameskip-v4"
+    "impala-BreakoutNoFrameskip-v4"
+    "impala-SpaceInvadersNoFrameskip-v4"
+    "impala-QbertNoFrameskip-v4"
+    "impala-CarRacing-v0"
+)
+train_loop "${ALGOS[*]}" "${ENVS[*]}" | xargs -I CMD -P $BENCHMARK_MAX_PROCS bash -c CMD

lambda_labs/lambda_requirements.txt

@@ -0,0 +1,16 @@
+scipy >= 1.10.0, < 1.11
+tensorboard >= ^2.11.0, < 2.12
+AutoROM.accept-rom-license >= 0.4.2, < 0.5
+stable-baselines3[extra] >= 1.7.0, < 1.8
+gym[box2d] >= 0.21.0, < 0.22
+pyglet == 1.5.27
+wandb >= 0.13.10, < 0.14
+pyvirtualdisplay == 3.0
+pybullet >= 3.2.5, < 3.3
+tabulate >= 0.9.0, < 0.10
+huggingface-hub >= 0.12.0, < 0.13
+numexpr >= 2.8.4, < 2.9
+gym3 >= 0.3.3, < 0.4
+glfw >= 1.12.0, < 1.13
+procgen >= 0.10.7, < 0.11
+ipython >= 8.10.0, < 8.11

lambda_labs/procgen_benchmark.sh

@@ -0,0 +1,18 @@
+source benchmarks/train_loop.sh
+
+# export WANDB_PROJECT_NAME="rl-algo-impls"
+
+BENCHMARK_MAX_PROCS="${BENCHMARK_MAX_PROCS:-3}"
+
+ALGOS=(
+    # "vpg"
+    # "dqn"
+    "ppo"
+)
+ENVS=(
+    "procgen-coinrun-easy"
+    "procgen-starpilot-easy"
+    "procgen-bossfight-easy"
+    "procgen-bigfish-easy"
+)
+train_loop "${ALGOS[*]}" "${ENVS[*]}" | xargs -I CMD -P $BENCHMARK_MAX_PROCS bash -c CMD

lambda_labs/setup.sh

@@ -0,0 +1,10 @@
+sudo apt update
+sudo apt install -y python-opengl
+sudo apt install -y ffmpeg
+sudo apt install -y xvfb
+sudo apt install -y swig
+
+python3 -m pip install --upgrade pip
+pip install --upgrade torch torchvision torchaudio
+
+pip install --upgrade -r ~/rl-algo-impls/lambda_labs/lambda_requirements.txt

ppo/policy.py

@@ -0,0 +1,31 @@
+from stable_baselines3.common.vec_env.base_vec_env import VecEnv
+from typing import Optional, Sequence
+
+from gym.spaces import Box, Discrete
+from shared.policy.on_policy import ActorCritic, default_hidden_sizes
+
+
+class PPOActorCritic(ActorCritic):
+    def __init__(
+        self,
+        env: VecEnv,
+        pi_hidden_sizes: Optional[Sequence[int]] = None,
+        v_hidden_sizes: Optional[Sequence[int]] = None,
+        **kwargs,
+    ) -> None:
+        pi_hidden_sizes = (
+            pi_hidden_sizes
+            if pi_hidden_sizes is not None
+            else default_hidden_sizes(env.observation_space)
+        )
+        v_hidden_sizes = (
+            v_hidden_sizes
+            if v_hidden_sizes is not None
+            else default_hidden_sizes(env.observation_space)
+        )
+        super().__init__(
+            env,
+            pi_hidden_sizes,
+            v_hidden_sizes,
+            **kwargs,
+        )

ppo/ppo.py

@@ -0,0 +1,303 @@
+import numpy as np
+import torch
+import torch.nn as nn
+
+from dataclasses import asdict, dataclass, field
+from torch.optim import Adam
+from stable_baselines3.common.vec_env.base_vec_env import VecEnv, VecEnvObs
+from torch.utils.tensorboard.writer import SummaryWriter
+from typing import List, Optional, Sequence, NamedTuple, TypeVar
+
+from shared.algorithm import Algorithm
+from shared.callbacks.callback import Callback
+from shared.gae import compute_advantage, compute_rtg_and_advantage, RtgAdvantage
+from shared.policy.on_policy import ActorCritic
+from shared.schedule import constant_schedule, linear_schedule
+from shared.trajectory import Trajectory, TrajectoryAccumulator
+
+
+@dataclass
+class PPOTrajectory(Trajectory):
+    logp_a: List[float] = field(default_factory=list)
+
+    def add(
+        self,
+        obs: np.ndarray,
+        act: np.ndarray,
+        next_obs: np.ndarray,
+        rew: float,
+        terminated: bool,
+        v: float,
+        logp_a: float,
+    ):
+        super().add(obs, act, next_obs, rew, terminated, v)
+        self.logp_a.append(logp_a)
+
+
+class PPOTrajectoryAccumulator(TrajectoryAccumulator):
+    def __init__(self, num_envs: int) -> None:
+        super().__init__(num_envs, PPOTrajectory)
+
+    def step(
+        self,
+        obs: VecEnvObs,
+        action: np.ndarray,
+        next_obs: VecEnvObs,
+        reward: np.ndarray,
+        done: np.ndarray,
+        val: np.ndarray,
+        logp_a: np.ndarray,
+    ) -> None:
+        super().step(obs, action, next_obs, reward, done, val, logp_a)
+
+
+class TrainStepStats(NamedTuple):
+    loss: float
+    pi_loss: float
+    v_loss: float
+    entropy_loss: float
+    approx_kl: float
+    clipped_frac: float
+
+
+@dataclass
+class TrainStats:
+    loss: float
+    pi_loss: float
+    v_loss: float
+    entropy_loss: float
+    approx_kl: float
+    clipped_frac: float
+
+    def __init__(self, step_stats: List[TrainStepStats]) -> None:
+        self.loss = np.mean([s.loss for s in step_stats]).item()
+        self.pi_loss = np.mean([s.pi_loss for s in step_stats]).item()
+        self.v_loss = np.mean([s.v_loss for s in step_stats]).item()
+        self.entropy_loss = np.mean([s.entropy_loss for s in step_stats]).item()
+        self.approx_kl = np.mean([s.approx_kl for s in step_stats]).item()
+        self.clipped_frac = np.mean([s.clipped_frac for s in step_stats]).item()
+
+    def write_to_tensorboard(self, tb_writer: SummaryWriter, global_step: int) -> None:
+        tb_writer.add_scalars("losses", asdict(self), global_step=global_step)
+
+    def __repr__(self) -> str:
+        return " | ".join(
+            [
+                f"Loss: {round(self.loss, 2)}",
+                f"Pi L: {round(self.pi_loss, 2)}",
+                f"V L: {round(self.v_loss, 2)}",
+                f"E L: {round(self.entropy_loss, 2)}",
+                f"Apx KL Div: {round(self.approx_kl, 2)}",
+                f"Clip Frac: {round(self.clipped_frac, 2)}",
+            ]
+        )
+
+
+PPOSelf = TypeVar("PPOSelf", bound="PPO")
+
+
+class PPO(Algorithm):
+    def __init__(
+        self,
+        policy: ActorCritic,
+        env: VecEnv,
+        device: torch.device,
+        tb_writer: SummaryWriter,
+        learning_rate: float = 3e-4,
+        learning_rate_decay: str = "none",
+        n_steps: int = 2048,
+        batch_size: int = 64,
+        n_epochs: int = 10,
+        gamma: float = 0.99,
+        gae_lambda: float = 0.95,
+        clip_range: float = 0.2,
+        clip_range_decay: str = "none",
+        clip_range_vf: Optional[float] = None,
+        clip_range_vf_decay: str = "none",
+        normalize_advantage: bool = True,
+        ent_coef: float = 0.0,
+        ent_coef_decay: str = "none",
+        vf_coef: float = 0.5,
+        max_grad_norm: float = 0.5,
+        update_rtg_between_epochs: bool = False,
+        sde_sample_freq: int = -1,
+    ) -> None:
+        super().__init__(policy, env, device, tb_writer)
+        self.policy = policy
+
+        self.gamma = gamma
+        self.gae_lambda = gae_lambda
+        self.optimizer = Adam(self.policy.parameters(), lr=learning_rate)
+        self.lr_schedule = (
+            linear_schedule(learning_rate, 0)
+            if learning_rate_decay == "linear"
+            else constant_schedule(learning_rate)
+        )
+        self.max_grad_norm = max_grad_norm
+        self.clip_range_schedule = (
+            linear_schedule(clip_range, 0)
+            if clip_range_decay == "linear"
+            else constant_schedule(clip_range)
+        )
+        self.clip_range_vf_schedule = None
+        if clip_range_vf:
+            self.clip_range_vf_schedule = (
+                linear_schedule(clip_range_vf, 0)
+                if clip_range_vf_decay == "linear"
+                else constant_schedule(clip_range_vf)
+            )
+        self.normalize_advantage = normalize_advantage
+        self.ent_coef_schedule = (
+            linear_schedule(ent_coef, 0)
+            if ent_coef_decay == "linear"
+            else constant_schedule(ent_coef)
+        )
+        self.vf_coef = vf_coef
+
+        self.n_steps = n_steps
+        self.batch_size = batch_size
+        self.n_epochs = n_epochs
+        self.sde_sample_freq = sde_sample_freq
+
+        self.update_rtg_between_epochs = update_rtg_between_epochs
+
+    def learn(
+        self: PPOSelf,
+        total_timesteps: int,
+        callback: Optional[Callback] = None,
+    ) -> PPOSelf:
+        obs = self.env.reset()
+        ts_elapsed = 0
+        while ts_elapsed < total_timesteps:
+            accumulator = self._collect_trajectories(obs)
+            progress = ts_elapsed / total_timesteps
+            train_stats = self.train(accumulator.all_trajectories, progress)
+            rollout_steps = self.n_steps * self.env.num_envs
+            ts_elapsed += rollout_steps
+            train_stats.write_to_tensorboard(self.tb_writer, ts_elapsed)
+            if callback:
+                callback.on_step(timesteps_elapsed=rollout_steps)
+
+        return self
+
+    def _collect_trajectories(self, obs: VecEnvObs) -> PPOTrajectoryAccumulator:
+        self.policy.eval()
+        accumulator = PPOTrajectoryAccumulator(self.env.num_envs)
+        self.policy.reset_noise()
+        for i in range(self.n_steps):
+            if self.sde_sample_freq > 0 and i > 0 and i % self.sde_sample_freq == 0:
+                self.policy.reset_noise()
+            action, value, logp_a, clamped_action = self.policy.step(obs)
+            next_obs, reward, done, _ = self.env.step(clamped_action)
+            accumulator.step(obs, action, next_obs, reward, done, value, logp_a)
+            obs = next_obs
+        return accumulator
+
+    def train(self, trajectories: List[PPOTrajectory], progress: float) -> TrainStats:
+        self.policy.train()
+        learning_rate = self.lr_schedule(progress)
+        self.optimizer.param_groups[0]["lr"] = learning_rate
+
+        pi_clip = self.clip_range_schedule(progress)
+        v_clip = (
+            self.clip_range_vf_schedule(progress)
+            if self.clip_range_vf_schedule
+            else None
+        )
+        ent_coef = self.ent_coef_schedule(progress)
+
+        obs = torch.as_tensor(
+            np.concatenate([np.array(t.obs) for t in trajectories]), device=self.device
+        )
+        act = torch.as_tensor(
+            np.concatenate([np.array(t.act) for t in trajectories]), device=self.device
+        )
+        rtg, adv = compute_rtg_and_advantage(
+            trajectories, self.policy, self.gamma, self.gae_lambda, self.device
+        )
+        orig_v = torch.as_tensor(
+            np.concatenate([np.array(t.v) for t in trajectories]), device=self.device
+        )
+        orig_logp_a = torch.as_tensor(
+            np.concatenate([np.array(t.logp_a) for t in trajectories]),
+            device=self.device,
+        )
+
+        step_stats = []
+        for _ in range(self.n_epochs):
+            if self.update_rtg_between_epochs:
+                rtg, adv = compute_rtg_and_advantage(
+                    trajectories, self.policy, self.gamma, self.gae_lambda, self.device
+                )
+            else:
+                adv = compute_advantage(
+                    trajectories, self.policy, self.gamma, self.gae_lambda, self.device
+                )
+            idxs = torch.randperm(len(obs))
+            for i in range(0, len(obs), self.batch_size):
+                mb_idxs = idxs[i : i + self.batch_size]
+                mb_adv = adv[mb_idxs]
+                if self.normalize_advantage:
+                    mb_adv = (mb_adv - mb_adv.mean(-1)) / (mb_adv.std(-1) + 1e-8)
+                step_stats.append(
+                    self._train_step(
+                        pi_clip,
+                        v_clip,
+                        ent_coef,
+                        obs[mb_idxs],
+                        act[mb_idxs],
+                        rtg[mb_idxs],
+                        mb_adv,
+                        orig_v[mb_idxs],
+                        orig_logp_a[mb_idxs],
+                    )
+                )
+
+        return TrainStats(step_stats)
+
+    def _train_step(
+        self,
+        pi_clip: float,
+        v_clip: Optional[float],
+        ent_coef: float,
+        obs: torch.Tensor,
+        act: torch.Tensor,
+        rtg: torch.Tensor,
+        adv: torch.Tensor,
+        orig_v: torch.Tensor,
+        orig_logp_a: torch.Tensor,
+    ) -> TrainStepStats:
+        logp_a, entropy, v = self.policy(obs, act)
+        logratio = logp_a - orig_logp_a
+        ratio = torch.exp(logratio)
+        clip_ratio = torch.clamp(ratio, min=1 - pi_clip, max=1 + pi_clip)
+        pi_loss = torch.maximum(-ratio * adv, -clip_ratio * adv).mean()
+
+        v_loss = (v - rtg).pow(2)
+        if v_clip:
+            v_clipped = (torch.clamp(v, orig_v - v_clip, orig_v + v_clip) - rtg).pow(2)
+            v_loss = torch.maximum(v_loss, v_clipped)
+        v_loss = v_loss.mean()
+
+        entropy_loss = entropy.mean()
+
+        loss = pi_loss - ent_coef * entropy_loss + self.vf_coef * v_loss
+
+        self.optimizer.zero_grad()
+        loss.backward()
+        nn.utils.clip_grad_norm_(self.policy.parameters(), self.max_grad_norm)
+        self.optimizer.step()
+
+        with torch.no_grad():
+            approx_kl = ((ratio - 1) - logratio).mean().cpu().numpy().item()
+            clipped_frac = (
+                ((ratio - 1).abs() > pi_clip).float().mean().cpu().numpy().item()
+            )
+        return TrainStepStats(
+            loss.item(),
+            pi_loss.item(),
+            v_loss.item(),
+            entropy_loss.item(),
+            approx_kl,
+            clipped_frac,
+        )

publish/markdown_format.py

@@ -0,0 +1,210 @@
+import os
+import pandas as pd
+import wandb.apis.public
+import yaml
+
+from collections import defaultdict
+from dataclasses import dataclass, asdict
+from typing import Any, Dict, Iterable, List, NamedTuple, Optional, TypeVar
+from urllib.parse import urlparse
+
+from runner.evaluate import Evaluation
+
+EvaluationRowSelf = TypeVar("EvaluationRowSelf", bound="EvaluationRow")
+
+
+@dataclass
+class EvaluationRow:
+    algo: str
+    env: str
+    seed: Optional[int]
+    reward_mean: float
+    reward_std: float
+    eval_episodes: int
+    best: str
+    wandb_url: str
+
+    @staticmethod
+    def data_frame(rows: List[EvaluationRowSelf]) -> pd.DataFrame:
+        results = defaultdict(list)
+        for r in rows:
+            for k, v in asdict(r).items():
+                results[k].append(v)
+        return pd.DataFrame(results)
+
+
+class EvalTableData(NamedTuple):
+    run: wandb.apis.public.Run
+    evaluation: Evaluation
+
+
+def evaluation_table(table_data: Iterable[EvalTableData]) -> str:
+    best_stats = sorted(
+        [d.evaluation.stats for d in table_data], key=lambda r: r.score, reverse=True
+    )[0]
+    table_data = sorted(table_data, key=lambda d: d.evaluation.config.seed() or 0)
+    rows = [
+        EvaluationRow(
+            config.algo,
+            config.env_id,
+            config.seed(),
+            stats.score.mean,
+            stats.score.std,
+            len(stats),
+            "*" if stats == best_stats else "",
+            f"[wandb]({r.url})",
+        )
+        for (r, (_, stats, config)) in table_data
+    ]
+    df = EvaluationRow.data_frame(rows)
+    return df.to_markdown(index=False)
+
+
+def github_project_link(github_url: str) -> str:
+    return f"[{urlparse(github_url).path}]({github_url})"
+
+
+def header_section(algo: str, env: str, github_url: str, wandb_report_url: str) -> str:
+    algo_caps = algo.upper()
+    lines = [
+        f"# **{algo_caps}** Agent playing **{env}**",
+        f"This is a trained model of a **{algo_caps}** agent playing **{env}** using "
+        f"the {github_project_link(github_url)} repo.",
+        f"All models trained at this commit can be found at {wandb_report_url}.",
+    ]
+    return "\n\n".join(lines)
+
+
+def github_tree_link(github_url: str, commit_hash: Optional[str]) -> str:
+    if not commit_hash:
+        return github_project_link(github_url)
+    return f"[{commit_hash[:7]}]({github_url}/tree/{commit_hash})"
+
+
+def results_section(
+    table_data: List[EvalTableData], algo: str, github_url: str, commit_hash: str
+) -> str:
+    # type: ignore
+    lines = [
+        "## Training Results",
+        f"This model was trained from {len(table_data)} trainings of **{algo.upper()}** "
+        + "agents using different initial seeds. "
+        + f"These agents were trained by checking out "
+        + f"{github_tree_link(github_url, commit_hash)}. "
+        + "The best and last models were kept from each training. "
+        + "This submission has loaded the best models from each training, reevaluates "
+        + "them, and selects the best model from these latest evaluations (mean - std).",
+    ]
+    lines.append(evaluation_table(table_data))
+    return "\n\n".join(lines)
+
+
+def prerequisites_section() -> str:
+    return """
+### Prerequisites: Weights & Biases (WandB)
+Training and benchmarking assumes you have a Weights & Biases project to upload runs to.
+By default training goes to a rl-algo-impls project while benchmarks go to
+rl-algo-impls-benchmarks. During training and benchmarking runs, videos of the best
+models and the model weights are uploaded to WandB.
+
+Before doing anything below, you'll need to create a wandb account and run `wandb
+login`.
+"""
+
+
+def usage_section(github_url: str, run_path: str, commit_hash: str) -> str:
+    return f"""
+## Usage
+{urlparse(github_url).path}: {github_url}
+
+Note: While the model state dictionary and hyperaparameters are saved, the latest
+implementation could be sufficiently different to not be able to reproduce similar
+results. You might need to checkout the commit the agent was trained on:
+{github_tree_link(github_url, commit_hash)}.
+```
+# Downloads the model, sets hyperparameters, and runs agent for 3 episodes
+python enjoy.py --wandb-run-path={run_path}
+```
+
+Setup hasn't been completely worked out yet, so you might be best served by using Google
+Colab starting from the
+[colab_enjoy.ipynb](https://github.com/sgoodfriend/rl-algo-impls/blob/main/colab_enjoy.ipynb)
+notebook.
+"""
+
+
+def training_setion(
+    github_url: str, commit_hash: str, algo: str, env: str, seed: Optional[int]
+) -> str:
+    return f"""
+## Training
+If you want the highest chance to reproduce these results, you'll want to checkout the
+commit the agent was trained on: {github_tree_link(github_url, commit_hash)}. While
+training is deterministic, different hardware will give different results.
+
+```
+python train.py --algo {algo} --env {env} {'--seed ' + str(seed) if seed is not None else ''}
+```
+
+Setup hasn't been completely worked out yet, so you might be best served by using Google
+Colab starting from the
+[colab_train.ipynb](https://github.com/sgoodfriend/rl-algo-impls/blob/main/colab_train.ipynb)
+notebook.
+"""
+
+
+def benchmarking_section(report_url: str) -> str:
+    return f"""
+## Benchmarking (with Lambda Labs instance)
+This and other models from {report_url} were generated by running a script on a Lambda
+Labs instance. In a Lambda Labs instance terminal:
+```
+git clone git@github.com:sgoodfriend/rl-algo-impls.git
+cd rl-algo-impls
+bash ./lambda_labs/setup.sh
+wandb login
+bash ./lambda_labs/benchmark.sh
+```
+
+### Alternative: Google Colab Pro+
+As an alternative,
+[colab_benchmark.ipynb](https://github.com/sgoodfriend/rl-algo-impls/tree/main/benchmarks#:~:text=colab_benchmark.ipynb),
+can be used. However, this requires a Google Colab Pro+ subscription and running across
+4 separate instances because otherwise running all jobs will exceed the 24-hour limit.
+"""
+
+
+def hyperparams_section(run_config: Dict[str, Any]) -> str:
+    return f"""
+## Hyperparameters
+This isn't exactly the format of hyperparams in {os.path.join("hyperparams",
+run_config["algo"] + ".yml")}, but instead the Wandb Run Config. However, it's very
+close and has some additional data:
+```
+{yaml.dump(run_config)}
+```
+"""
+
+
+def model_card_text(
+    algo: str,
+    env: str,
+    github_url: str,
+    commit_hash: str,
+    wandb_report_url: str,
+    table_data: List[EvalTableData],
+    best_eval: EvalTableData,
+) -> str:
+    run, (_, _, config) = best_eval
+    run_path = "/".join(run.path)
+    return "\n\n".join(
+        [
+            header_section(algo, env, github_url, wandb_report_url),
+            results_section(table_data, algo, github_url, commit_hash),
+            prerequisites_section(),
+            usage_section(github_url, run_path, commit_hash),
+            training_setion(github_url, commit_hash, algo, env, config.seed()),
+            benchmarking_section(wandb_report_url),
+            hyperparams_section(run.config),
+        ]
+    )

pyproject.toml

@@ -0,0 +1,35 @@
+[tool.poetry]
+name = "rl-algo-impls"
+version = "0.1.0"
+description = "Implementations of reinforcement learning algorithms"
+authors = ["Scott Goodfriend <goodfriend.scott@gmail.com>"]
+license = "MIT License"
+readme = "README.md"
+packages = [{include = "rl_algo_impls"}]
+
+[tool.poetry.dependencies]
+python = "~3.10"
+"AutoROM.accept-rom-license" = "^0.4.2"
+stable-baselines3 = {extras = ["extra"], version = "^1.7.0"}
+scipy = "^1.10.0"
+gym = {extras = ["box2d"], version = "^0.21.0"}
+pyglet = "1.5.27"
+PyYAML = "^6.0"
+tensorboard = "^2.11.0"
+pybullet = "^3.2.5"
+wandb = "^0.13.9"
+conda-lock = "^1.3.0"
+torch-tb-profiler = "^0.4.1"
+jupyter = "^1.0.0"
+tabulate = "^0.9.0"
+huggingface-hub = "^0.12.0"
+cryptography = "39.0.1"
+pyvirtualdisplay = "^3.0"
+numexpr = "^2.8.4"
+gym3 = "^0.3.3"
+glfw = "1.12.0"
+ipython = "^8.10.0"
+
+[build-system]
+requires = ["poetry-core"]
+build-backend = "poetry.core.masonry.api"

replay.meta.json

@@ -0,0 +1 @@
+{"content_type": "video/mp4", "encoder_version": {"backend": "ffmpeg", "version": "b'ffmpeg version 5.1.2 Copyright (c) 2000-2022 the FFmpeg developers\\nbuilt with clang version 14.0.6\\nconfiguration: --prefix=/Users/runner/miniforge3/conda-bld/ffmpeg_1671040513231/_h_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_pl --cc=arm64-apple-darwin20.0.0-clang --cxx=arm64-apple-darwin20.0.0-clang++ --nm=arm64-apple-darwin20.0.0-nm --ar=arm64-apple-darwin20.0.0-ar --disable-doc --disable-openssl --enable-demuxer=dash --enable-hardcoded-tables --enable-libfreetype --enable-libfontconfig --enable-libopenh264 --enable-cross-compile --arch=arm64 --target-os=darwin --cross-prefix=arm64-apple-darwin20.0.0- --host-cc=/Users/runner/miniforge3/conda-bld/ffmpeg_1671040513231/_build_env/bin/x86_64-apple-darwin13.4.0-clang --enable-neon --enable-gnutls --enable-libmp3lame --enable-libvpx --enable-pthreads --enable-gpl --enable-libx264 --enable-libx265 --enable-libaom --enable-libsvtav1 --enable-libxml2 --enable-pic --enable-shared --disable-static --enable-version3 --enable-zlib --pkg-config=/Users/runner/miniforge3/conda-bld/ffmpeg_1671040513231/_build_env/bin/pkg-config\\nlibavutil      57. 28.100 / 57. 28.100\\nlibavcodec     59. 37.100 / 59. 37.100\\nlibavformat    59. 27.100 / 59. 27.100\\nlibavdevice    59.  7.100 / 59.  7.100\\nlibavfilter     8. 44.100 /  8. 44.100\\nlibswscale      6.  7.100 /  6.  7.100\\nlibswresample   4.  7.100 /  4.  7.100\\nlibpostproc    56.  6.100 / 56.  6.100\\n'", "cmdline": ["ffmpeg", "-nostats", "-loglevel", "error", "-y", "-f", "rawvideo", "-s:v", "600x400", "-pix_fmt", "rgb24", "-framerate", "50", "-i", "-", "-vf", "scale=trunc(iw/2)*2:trunc(ih/2)*2", "-vcodec", "libx264", "-pix_fmt", "yuv420p", "-r", "50", "/var/folders/9g/my5557_91xddp6lx00nkzly80000gn/T/tmpmc0upp65/ppo-impala-CarRacing-v0/replay.mp4"]}, "episode": {"r": 930.6033935546875, "l": 694, "t": 9.366596}}

runner/config.py

@@ -0,0 +1,154 @@
+import os
+
+from datetime import datetime
+from dataclasses import dataclass
+from typing import Any, Dict, NamedTuple, Optional, TypedDict, Union
+
+
+@dataclass
+class RunArgs:
+    algo: str
+    env: str
+    seed: Optional[int] = None
+    use_deterministic_algorithms: bool = True
+
+
+class EnvHyperparams(NamedTuple):
+    is_procgen: bool = False
+    n_envs: int = 1
+    frame_stack: int = 1
+    make_kwargs: Optional[Dict[str, Any]] = None
+    no_reward_timeout_steps: Optional[int] = None
+    no_reward_fire_steps: Optional[int] = None
+    vec_env_class: str = "dummy"
+    normalize: bool = False
+    normalize_kwargs: Optional[Dict[str, Any]] = None
+    rolling_length: int = 100
+    train_record_video: bool = False
+    video_step_interval: Union[int, float] = 1_000_000
+    initial_steps_to_truncate: Optional[int] = None
+
+
+class Hyperparams(TypedDict, total=False):
+    device: str
+    n_timesteps: Union[int, float]
+    env_hyperparams: Dict[str, Any]
+    policy_hyperparams: Dict[str, Any]
+    algo_hyperparams: Dict[str, Any]
+    eval_params: Dict[str, Any]
+
+
+@dataclass
+class Config:
+    args: RunArgs
+    hyperparams: Hyperparams
+    root_dir: str
+    run_id: str = datetime.now().isoformat()
+
+    def seed(self, training: bool = True) -> Optional[int]:
+        seed = self.args.seed
+        if training or seed is None:
+            return seed
+        return seed + self.env_hyperparams.get("n_envs", 1)
+
+    @property
+    def device(self) -> str:
+        return self.hyperparams.get("device", "auto")
+
+    @property
+    def n_timesteps(self) -> int:
+        return int(self.hyperparams.get("n_timesteps", 100_000))
+
+    @property
+    def env_hyperparams(self) -> Dict[str, Any]:
+        return self.hyperparams.get("env_hyperparams", {})
+
+    @property
+    def policy_hyperparams(self) -> Dict[str, Any]:
+        return self.hyperparams.get("policy_hyperparams", {})
+
+    @property
+    def algo_hyperparams(self) -> Dict[str, Any]:
+        return self.hyperparams.get("algo_hyperparams", {})
+
+    @property
+    def eval_params(self) -> Dict[str, Any]:
+        return self.hyperparams.get("eval_params", {})
+
+    @property
+    def algo(self) -> str:
+        return self.args.algo
+
+    @property
+    def env_id(self) -> str:
+        return self.hyperparams.get("env_id") or self.args.env
+
+    def model_name(self, include_seed: bool = True) -> str:
+        # Use arg env name instead of environment name
+        parts = [self.algo, self.args.env]
+        if include_seed and self.args.seed is not None:
+            parts.append(f"S{self.args.seed}")
+
+        # Assume that the custom arg name already has the necessary information
+        if not self.hyperparams.get("env_id"):
+            make_kwargs = self.env_hyperparams.get("make_kwargs", {})
+            if make_kwargs:
+                for k, v in make_kwargs.items():
+                    if type(v) == bool and v:
+                        parts.append(k)
+                    elif type(v) == int and v:
+                        parts.append(f"{k}{v}")
+                    else:
+                        parts.append(str(v))
+
+        return "-".join(parts)
+
+    @property
+    def run_name(self) -> str:
+        parts = [self.model_name(), self.run_id]
+        return "-".join(parts)
+
+    @property
+    def saved_models_dir(self) -> str:
+        return os.path.join(self.root_dir, "saved_models")
+
+    @property
+    def downloaded_models_dir(self) -> str:
+        return os.path.join(self.root_dir, "downloaded_models")
+
+    def model_dir_name(
+        self,
+        best: bool = False,
+        extension: str = "",
+    ) -> str:
+        return self.model_name() + ("-best" if best else "") + extension
+
+    def model_dir_path(self, best: bool = False, downloaded: bool = False) -> str:
+        return os.path.join(
+            self.saved_models_dir if not downloaded else self.downloaded_models_dir,
+            self.model_dir_name(best=best),
+        )
+
+    @property
+    def runs_dir(self) -> str:
+        return os.path.join(self.root_dir, "runs")
+
+    @property
+    def tensorboard_summary_path(self) -> str:
+        return os.path.join(self.runs_dir, self.run_name)
+
+    @property
+    def logs_path(self) -> str:
+        return os.path.join(self.runs_dir, f"log.yml")
+
+    @property
+    def videos_dir(self) -> str:
+        return os.path.join(self.root_dir, "videos")
+
+    @property
+    def video_prefix(self) -> str:
+        return os.path.join(self.videos_dir, self.model_name())
+
+    @property
+    def best_videos_dir(self) -> str:
+        return os.path.join(self.videos_dir, f"{self.model_name()}-best")

runner/env.py

@@ -0,0 +1,256 @@
+import gym
+import numpy as np
+import os
+
+from gym.wrappers.resize_observation import ResizeObservation
+from gym.wrappers.gray_scale_observation import GrayScaleObservation
+from gym.wrappers.frame_stack import FrameStack
+from procgen.env import ProcgenEnv
+from stable_baselines3.common.atari_wrappers import (
+    MaxAndSkipEnv,
+    NoopResetEnv,
+)
+from stable_baselines3.common.vec_env.base_vec_env import VecEnv
+from stable_baselines3.common.vec_env.dummy_vec_env import DummyVecEnv
+from stable_baselines3.common.vec_env.subproc_vec_env import SubprocVecEnv
+from stable_baselines3.common.vec_env.vec_normalize import VecNormalize
+from torch.utils.tensorboard.writer import SummaryWriter
+from typing import Callable, Optional, Union
+
+from runner.config import Config, EnvHyperparams
+from shared.policy.policy import VEC_NORMALIZE_FILENAME
+from wrappers.atari_wrappers import EpisodicLifeEnv, FireOnLifeStarttEnv, ClipRewardEnv
+from wrappers.episode_record_video import EpisodeRecordVideo
+from wrappers.episode_stats_writer import EpisodeStatsWriter
+from wrappers.get_rgb_observation import GetRgbObservation
+from wrappers.initial_step_truncate_wrapper import InitialStepTruncateWrapper
+from wrappers.is_vector_env import IsVectorEnv
+from wrappers.noop_env_seed import NoopEnvSeed
+from wrappers.transpose_image_observation import TransposeImageObservation
+from wrappers.video_compat_wrapper import VideoCompatWrapper
+
+GeneralVecEnv = Union[VecEnv, gym.vector.VectorEnv, gym.Wrapper]
+
+
+def make_env(
+    config: Config,
+    hparams: EnvHyperparams,
+    training: bool = True,
+    render: bool = False,
+    normalize_load_path: Optional[str] = None,
+    tb_writer: Optional[SummaryWriter] = None,
+) -> GeneralVecEnv:
+    if hparams.is_procgen:
+        return _make_procgen_env(
+            config,
+            hparams,
+            training=training,
+            render=render,
+            normalize_load_path=normalize_load_path,
+            tb_writer=tb_writer,
+        )
+    else:
+        return _make_vec_env(
+            config,
+            hparams,
+            training=training,
+            render=render,
+            normalize_load_path=normalize_load_path,
+            tb_writer=tb_writer,
+        )
+
+
+def make_eval_env(
+    config: Config,
+    hparams: EnvHyperparams,
+    override_n_envs: Optional[int] = None,
+    **kwargs
+) -> GeneralVecEnv:
+    kwargs = kwargs.copy()
+    kwargs["training"] = False
+    if override_n_envs is not None:
+        hparams_kwargs = hparams._asdict()
+        hparams_kwargs["n_envs"] = override_n_envs
+        if override_n_envs == 1:
+            hparams_kwargs["vec_env_class"] = "dummy"
+        hparams = EnvHyperparams(**hparams_kwargs)
+    return make_env(config, hparams, **kwargs)
+
+
+def _make_vec_env(
+    config: Config,
+    hparams: EnvHyperparams,
+    training: bool = True,
+    render: bool = False,
+    normalize_load_path: Optional[str] = None,
+    tb_writer: Optional[SummaryWriter] = None,
+) -> GeneralVecEnv:
+    (
+        _,
+        n_envs,
+        frame_stack,
+        make_kwargs,
+        no_reward_timeout_steps,
+        no_reward_fire_steps,
+        vec_env_class,
+        normalize,
+        normalize_kwargs,
+        rolling_length,
+        train_record_video,
+        video_step_interval,
+        initial_steps_to_truncate,
+    ) = hparams
+
+    if "BulletEnv" in config.env_id:
+        import pybullet_envs
+
+    spec = gym.spec(config.env_id)
+    seed = config.seed(training=training)
+
+    def make(idx: int) -> Callable[[], gym.Env]:
+        env_kwargs = make_kwargs.copy() if make_kwargs is not None else {}
+        if "BulletEnv" in config.env_id and render:
+            env_kwargs["render"] = True
+        if "CarRacing" in config.env_id:
+            env_kwargs["verbose"] = 0
+        if "procgen" in config.env_id:
+            if not render:
+                env_kwargs["render_mode"] = "rgb_array"
+
+        def _make() -> gym.Env:
+            env = gym.make(config.env_id, **env_kwargs)
+            env = gym.wrappers.RecordEpisodeStatistics(env)
+            env = VideoCompatWrapper(env)
+            if training and train_record_video and idx == 0:
+                env = EpisodeRecordVideo(
+                    env,
+                    config.video_prefix,
+                    step_increment=n_envs,
+                    video_step_interval=int(video_step_interval),
+                )
+            if training and initial_steps_to_truncate:
+                env = InitialStepTruncateWrapper(
+                    env, idx * initial_steps_to_truncate // n_envs
+                )
+            if "AtariEnv" in spec.entry_point:  # type: ignore
+                env = NoopResetEnv(env, noop_max=30)
+                env = MaxAndSkipEnv(env, skip=4)
+                env = EpisodicLifeEnv(env, training=training)
+                action_meanings = env.unwrapped.get_action_meanings()
+                if "FIRE" in action_meanings:  # type: ignore
+                    env = FireOnLifeStarttEnv(env, action_meanings.index("FIRE"))
+                env = ClipRewardEnv(env, training=training)
+                env = ResizeObservation(env, (84, 84))
+                env = GrayScaleObservation(env, keep_dim=False)
+                env = FrameStack(env, frame_stack)
+            elif "CarRacing" in config.env_id:
+                env = ResizeObservation(env, (64, 64))
+                env = GrayScaleObservation(env, keep_dim=False)
+                env = FrameStack(env, frame_stack)
+            elif "procgen" in config.env_id:
+                # env = GrayScaleObservation(env, keep_dim=False)
+                env = NoopEnvSeed(env)
+                env = TransposeImageObservation(env)
+                if frame_stack > 1:
+                    env = FrameStack(env, frame_stack)
+
+            if no_reward_timeout_steps:
+                from wrappers.no_reward_timeout import NoRewardTimeout
+
+                env = NoRewardTimeout(
+                    env, no_reward_timeout_steps, n_fire_steps=no_reward_fire_steps
+                )
+
+            if seed is not None:
+                env.seed(seed + idx)
+                env.action_space.seed(seed + idx)
+                env.observation_space.seed(seed + idx)
+
+            return env
+
+        return _make
+
+    VecEnvClass = {"dummy": DummyVecEnv, "subproc": SubprocVecEnv}[vec_env_class]
+    venv = VecEnvClass([make(i) for i in range(n_envs)])
+    if training:
+        assert tb_writer
+        venv = EpisodeStatsWriter(
+            venv, tb_writer, training=training, rolling_length=rolling_length
+        )
+    if normalize:
+        if normalize_load_path:
+            venv = VecNormalize.load(
+                os.path.join(normalize_load_path, VEC_NORMALIZE_FILENAME),
+                venv,  # type: ignore
+            )
+        else:
+            venv = VecNormalize(
+                venv,  # type: ignore
+                training=training,
+                **(normalize_kwargs or {}),
+            )
+        if not training:
+            venv.norm_reward = False
+    return venv
+
+
+def _make_procgen_env(
+    config: Config,
+    hparams: EnvHyperparams,
+    training: bool = True,
+    render: bool = False,
+    normalize_load_path: Optional[str] = None,
+    tb_writer: Optional[SummaryWriter] = None,
+) -> GeneralVecEnv:
+    (
+        _,
+        n_envs,
+        frame_stack,
+        make_kwargs,
+        _,  # no_reward_timeout_steps
+        _,  # no_reward_fire_steps
+        _,  # vec_env_class
+        normalize,
+        normalize_kwargs,
+        rolling_length,
+        _,  # train_record_video
+        _,  # video_step_interval
+        _,  # initial_steps_to_truncate
+    ) = hparams
+
+    seed = config.seed(training=training)
+
+    make_kwargs = make_kwargs or {}
+    if not render:
+        make_kwargs["render_mode"] = "rgb_array"
+    if seed is not None:
+        make_kwargs["rand_seed"] = seed
+
+    envs = ProcgenEnv(n_envs, config.env_id, **make_kwargs)
+    envs = IsVectorEnv(envs)
+    envs = GetRgbObservation(envs)
+    # TODO: Handle Grayscale and/or FrameStack
+    envs = TransposeImageObservation(envs)
+
+    envs = gym.wrappers.RecordEpisodeStatistics(envs)
+
+    if seed is not None:
+        envs.action_space.seed(seed)
+        envs.observation_space.seed(seed)
+
+    if training:
+        assert tb_writer
+        envs = EpisodeStatsWriter(
+            envs, tb_writer, training=training, rolling_length=rolling_length
+        )
+    if normalize and training:
+        normalize_kwargs = normalize_kwargs or {}
+        # TODO: Handle reward stats saving/loading/syncing, but it's only important
+        # for checkpointing
+        envs = gym.wrappers.NormalizeReward(envs)
+        clip_obs = normalize_kwargs.get("clip_reward", 10.0)
+        envs = gym.wrappers.TransformReward(
+            envs, lambda r: np.clip(r, -clip_obs, clip_obs)
+        )
+
+    return envs

runner/evaluate.py

@@ -0,0 +1,103 @@
+import os
+import shutil
+
+from dataclasses import dataclass
+from typing import NamedTuple, Optional
+
+from runner.env import make_eval_env
+from runner.config import Config, EnvHyperparams, RunArgs
+from runner.running_utils import (
+    load_hyperparams,
+    set_seeds,
+    get_device,
+    make_policy,
+)
+from shared.callbacks.eval_callback import evaluate
+from shared.policy.policy import Policy
+from shared.stats import EpisodesStats
+
+
+@dataclass
+class EvalArgs(RunArgs):
+    render: bool = True
+    best: bool = True
+    n_envs: Optional[int] = 1
+    n_episodes: int = 3
+    deterministic_eval: Optional[bool] = None
+    no_print_returns: bool = False
+    wandb_run_path: Optional[str] = None
+
+
+class Evaluation(NamedTuple):
+    policy: Policy
+    stats: EpisodesStats
+    config: Config
+
+
+def evaluate_model(args: EvalArgs, root_dir: str) -> Evaluation:
+    if args.wandb_run_path:
+        import wandb
+
+        api = wandb.Api()
+        run = api.run(args.wandb_run_path)
+        hyperparams = run.config
+
+        args.algo = hyperparams["algo"]
+        args.env = hyperparams["env"]
+        args.seed = hyperparams.get("seed", None)
+        args.use_deterministic_algorithms = hyperparams.get(
+            "use_deterministic_algorithms", True
+        )
+
+        config = Config(args, hyperparams, root_dir)
+        model_path = config.model_dir_path(best=args.best, downloaded=True)
+
+        model_archive_name = config.model_dir_name(best=args.best, extension=".zip")
+        run.file(model_archive_name).download()
+        if os.path.isdir(model_path):
+            shutil.rmtree(model_path)
+        shutil.unpack_archive(model_archive_name, model_path)
+        os.remove(model_archive_name)
+    else:
+        hyperparams = load_hyperparams(args.algo, args.env, root_dir)
+
+        config = Config(args, hyperparams, root_dir)
+        model_path = config.model_dir_path(best=args.best)
+
+    print(args)
+
+    set_seeds(args.seed, args.use_deterministic_algorithms)
+
+    env = make_eval_env(
+        config,
+        EnvHyperparams(**config.env_hyperparams),
+        override_n_envs=args.n_envs,
+        render=args.render,
+        normalize_load_path=model_path,
+    )
+    device = get_device(config.device, env)
+    policy = make_policy(
+        args.algo,
+        env,
+        device,
+        load_path=model_path,
+        **config.policy_hyperparams,
+    ).eval()
+
+    deterministic = (
+        args.deterministic_eval
+        if args.deterministic_eval is not None
+        else config.eval_params.get("deterministic", True)
+    )
+    return Evaluation(
+        policy,
+        evaluate(
+            env,
+            policy,
+            args.n_episodes,
+            render=args.render,
+            deterministic=deterministic,
+            print_returns=not args.no_print_returns,
+        ),
+        config,
+    )

runner/running_utils.py

@@ -0,0 +1,192 @@
+import argparse
+import gym
+import json
+import matplotlib.pyplot as plt
+import numpy as np
+import os
+import random
+import torch
+import torch.backends.cudnn
+import yaml
+
+from gym.spaces import Box, Discrete
+from stable_baselines3.common.vec_env.base_vec_env import VecEnv
+from torch.utils.tensorboard.writer import SummaryWriter
+from typing import Dict, Optional, Type, Union
+
+from runner.config import Hyperparams
+from shared.algorithm import Algorithm
+from shared.callbacks.eval_callback import EvalCallback
+from shared.policy.policy import Policy
+
+from dqn.dqn import DQN
+from dqn.policy import DQNPolicy
+from vpg.vpg import VanillaPolicyGradient
+from vpg.policy import VPGActorCritic
+from ppo.ppo import PPO
+from ppo.policy import PPOActorCritic
+
+ALGOS: Dict[str, Type[Algorithm]] = {
+    "dqn": DQN,
+    "vpg": VanillaPolicyGradient,
+    "ppo": PPO,
+}
+POLICIES: Dict[str, Type[Policy]] = {
+    "dqn": DQNPolicy,
+    "vpg": VPGActorCritic,
+    "ppo": PPOActorCritic,
+}
+
+HYPERPARAMS_PATH = "hyperparams"
+
+
+def base_parser(multiple: bool = True) -> argparse.ArgumentParser:
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        "--algo",
+        default=["dqn"],
+        type=str,
+        choices=list(ALGOS.keys()),
+        nargs="+" if multiple else 1,
+        help="Abbreviation(s) of algorithm(s)",
+    )
+    parser.add_argument(
+        "--env",
+        default=["CartPole-v1"],
+        type=str,
+        nargs="+" if multiple else 1,
+        help="Name of environment(s) in gym",
+    )
+    parser.add_argument(
+        "--seed",
+        default=[1],
+        type=int,
+        nargs="*" if multiple else "?",
+        help="Seeds to run experiment. Unset will do one run with no set seed",
+    )
+    parser.add_argument(
+        "--use-deterministic-algorithms",
+        default=True,
+        type=bool,
+        help="If seed set, set torch.use_deterministic_algorithms",
+    )
+    return parser
+
+
+def load_hyperparams(algo: str, env_id: str, root_path: str) -> Hyperparams:
+    hyperparams_path = os.path.join(root_path, HYPERPARAMS_PATH, f"{algo}.yml")
+    with open(hyperparams_path, "r") as f:
+        hyperparams_dict = yaml.safe_load(f)
+
+    if env_id in hyperparams_dict:
+        return hyperparams_dict[env_id]
+
+    if "BulletEnv" in env_id:
+        import pybullet_envs
+    spec = gym.spec(env_id)
+    if "AtariEnv" in str(spec.entry_point) and "_atari" in hyperparams_dict:
+        return hyperparams_dict["_atari"]
+    else:
+        raise ValueError(f"{env_id} not specified in {algo} hyperparameters file")
+
+
+def get_device(device: str, env: VecEnv) -> torch.device:
+    # cuda by default
+    if device == "auto":
+        device = "cuda"
+    # Apple MPS is a second choice (sometimes)
+    if device == "cuda" and not torch.cuda.is_available():
+        device = "mps"
+    # If no MPS, fallback to cpu
+    if device == "mps" and not torch.backends.mps.is_available():
+        device = "cpu"
+    # Simple environments like Discreet and 1-D Boxes might also be better
+    # served with the CPU.
+    if device == "mps":
+        obs_space = env.observation_space
+        if isinstance(obs_space, Discrete):
+            device = "cpu"
+        elif isinstance(obs_space, Box) and len(obs_space.shape) == 1:
+            device = "cpu"
+    print(f"Device: {device}")
+    return torch.device(device)
+
+
+def set_seeds(seed: Optional[int], use_deterministic_algorithms: bool) -> None:
+    if seed is None:
+        return
+    random.seed(seed)
+    np.random.seed(seed)
+    torch.manual_seed(seed)
+    torch.backends.cudnn.benchmark = False
+    torch.use_deterministic_algorithms(use_deterministic_algorithms)
+    os.environ["CUBLAS_WORKSPACE_CONFIG"] = ":4096:8"
+    # Stop warning and it would introduce stochasticity if I was using TF
+    os.environ["TF_ENABLE_ONEDNN_OPTS"] = "0"
+
+
+def make_policy(
+    algo: str,
+    env: VecEnv,
+    device: torch.device,
+    load_path: Optional[str] = None,
+    **kwargs,
+) -> Policy:
+    policy = POLICIES[algo](env, **kwargs).to(device)
+    if load_path:
+        policy.load(load_path)
+    return policy
+
+
+def plot_eval_callback(callback: EvalCallback, tb_writer: SummaryWriter, run_name: str):
+    figure = plt.figure()
+    cumulative_steps = [
+        (idx + 1) * callback.step_freq for idx in range(len(callback.stats))
+    ]
+    plt.plot(
+        cumulative_steps,
+        [s.score.mean for s in callback.stats],
+        "b-",
+        label="mean",
+    )
+    plt.plot(
+        cumulative_steps,
+        [s.score.mean - s.score.std for s in callback.stats],
+        "g--",
+        label="mean-std",
+    )
+    plt.fill_between(
+        cumulative_steps,
+        [s.score.min for s in callback.stats],  # type: ignore
+        [s.score.max for s in callback.stats],  # type: ignore
+        facecolor="cyan",
+        label="range",
+    )
+    plt.xlabel("Steps")
+    plt.ylabel("Score")
+    plt.legend()
+    plt.title(f"Eval {run_name}")
+    tb_writer.add_figure("eval", figure)
+
+
+Scalar = Union[bool, str, float, int, None]
+
+
+def hparam_dict(
+    hyperparams: Hyperparams, args: Dict[str, Union[Scalar, list]]
+) -> Dict[str, Scalar]:
+    flattened = args.copy()
+    for k, v in flattened.items():
+        if isinstance(v, list):
+            flattened[k] = json.dumps(v)
+    for k, v in hyperparams.items():
+        if isinstance(v, dict):
+            for sk, sv in v.items():
+                key = f"{k}/{sk}"
+                if isinstance(sv, dict) or isinstance(sv, list):
+                    flattened[key] = str(sv)
+                else:
+                    flattened[key] = sv
+        else:
+            flattened[k] = v  # type: ignore
+    return flattened  # type: ignore

runner/train.py

@@ -0,0 +1,134 @@
+# Support for PyTorch mps mode (https://pytorch.org/docs/stable/notes/mps.html)
+import os
+
+os.environ["PYTORCH_ENABLE_MPS_FALLBACK"] = "1"
+
+import dataclasses
+import shutil
+import wandb
+import yaml
+
+from dataclasses import dataclass
+from torch.utils.tensorboard.writer import SummaryWriter
+from typing import Any, Dict, Optional, Sequence
+
+from shared.callbacks.eval_callback import EvalCallback
+from runner.config import Config, EnvHyperparams, RunArgs
+from runner.env import make_env, make_eval_env
+from runner.running_utils import (
+    ALGOS,
+    load_hyperparams,
+    set_seeds,
+    get_device,
+    make_policy,
+    plot_eval_callback,
+    hparam_dict,
+)
+from shared.stats import EpisodesStats
+
+
+@dataclass
+class TrainArgs(RunArgs):
+    wandb_project_name: Optional[str] = None
+    wandb_entity: Optional[str] = None
+    wandb_tags: Sequence[str] = dataclasses.field(default_factory=list)
+
+
+def train(args: TrainArgs):
+    print(args)
+    hyperparams = load_hyperparams(args.algo, args.env, os.getcwd())
+    print(hyperparams)
+    config = Config(args, hyperparams, os.getcwd())
+
+    wandb_enabled = args.wandb_project_name
+    if wandb_enabled:
+        wandb.tensorboard.patch(
+            root_logdir=config.tensorboard_summary_path, pytorch=True
+        )
+        wandb.init(
+            project=args.wandb_project_name,
+            entity=args.wandb_entity,
+            config=hyperparams,  # type: ignore
+            name=config.run_name,
+            monitor_gym=True,
+            save_code=True,
+            tags=args.wandb_tags,
+        )
+        wandb.config.update(args)
+
+    tb_writer = SummaryWriter(config.tensorboard_summary_path)
+
+    set_seeds(args.seed, args.use_deterministic_algorithms)
+
+    env = make_env(
+        config, EnvHyperparams(**config.env_hyperparams), tb_writer=tb_writer
+    )
+    device = get_device(config.device, env)
+    policy = make_policy(args.algo, env, device, **config.policy_hyperparams)
+    algo = ALGOS[args.algo](policy, env, device, tb_writer, **config.algo_hyperparams)
+
+    eval_env = make_eval_env(config, EnvHyperparams(**config.env_hyperparams))
+    record_best_videos = config.eval_params.get("record_best_videos", True)
+    callback = EvalCallback(
+        policy,
+        eval_env,
+        tb_writer,
+        best_model_path=config.model_dir_path(best=True),
+        **config.eval_params,
+        video_env=make_eval_env(
+            config, EnvHyperparams(**config.env_hyperparams), override_n_envs=1
+        )
+        if record_best_videos
+        else None,
+        best_video_dir=config.best_videos_dir,
+    )
+    algo.learn(config.n_timesteps, callback=callback)
+
+    policy.save(config.model_dir_path(best=False))
+
+    eval_stats = callback.evaluate(n_episodes=10, print_returns=True)
+
+    plot_eval_callback(callback, tb_writer, config.run_name)
+
+    log_dict: Dict[str, Any] = {
+        "eval": eval_stats._asdict(),
+    }
+    if callback.best:
+        log_dict["best_eval"] = callback.best._asdict()
+    log_dict.update(hyperparams)
+    log_dict.update(vars(args))
+    with open(config.logs_path, "a") as f:
+        yaml.dump({config.run_name: log_dict}, f)
+
+    best_eval_stats: EpisodesStats = callback.best  # type: ignore
+    tb_writer.add_hparams(
+        hparam_dict(hyperparams, vars(args)),
+        {
+            "hparam/best_mean": best_eval_stats.score.mean,
+            "hparam/best_result": best_eval_stats.score.mean
+            - best_eval_stats.score.std,
+            "hparam/last_mean": eval_stats.score.mean,
+            "hparam/last_result": eval_stats.score.mean - eval_stats.score.std,
+        },
+        None,
+        config.run_name,
+    )
+
+    tb_writer.close()
+
+    if wandb_enabled:
+        wandb.run.summary["num_parameters"] = policy.num_parameters()
+        wandb.run.summary[
+            "num_trainable_parameters"
+        ] = policy.num_trainable_parameters()
+        shutil.make_archive(
+            os.path.join(wandb.run.dir, config.model_dir_name()),
+            "zip",
+            config.model_dir_path(),
+        )
+        shutil.make_archive(
+            os.path.join(wandb.run.dir, config.model_dir_name(best=True)),
+            "zip",
+            config.model_dir_path(best=True),
+        )
+        wandb.finish()

saved_models/ppo-impala-CarRacing-v0-S1-best/model.pth

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:9a1505a59f99e1f992ac78b528daf717631cb98cd022a44f0fa13e4b7bd7bc75
+size 5014216

shared/algorithm.py

@@ -0,0 +1,35 @@
+import gym
+import torch
+
+from abc import ABC, abstractmethod
+from stable_baselines3.common.vec_env.base_vec_env import VecEnv
+from torch.utils.tensorboard.writer import SummaryWriter
+from typing import List, Optional, TypeVar
+
+from shared.callbacks.callback import Callback
+from shared.policy.policy import Policy
+from shared.stats import EpisodesStats
+
+AlgorithmSelf = TypeVar("AlgorithmSelf", bound="Algorithm")
+
+class Algorithm(ABC):
+    @abstractmethod
+    def __init__(
+        self,
+        policy: Policy,
+        env: VecEnv,
+        device: torch.device,
+        tb_writer: SummaryWriter,
+        **kwargs,
+    ) -> None:
+        super().__init__()
+        self.policy = policy
+        self.env = env
+        self.device = device
+        self.tb_writer = tb_writer
+
+    @abstractmethod
+    def learn(
+        self: AlgorithmSelf, total_timesteps: int, callback: Optional[Callback] = None
+    ) -> AlgorithmSelf:
+        ...

shared/callbacks/callback.py

@@ -0,0 +1,12 @@
+from abc import ABC, abstractmethod
+
+
+class Callback(ABC):
+
+    def __init__(self) -> None:
+        super().__init__()
+        self.timesteps_elapsed = 0
+
+    def on_step(self, timesteps_elapsed: int = 1) -> bool:
+        self.timesteps_elapsed += timesteps_elapsed
+        return True

shared/callbacks/eval_callback.py

@@ -0,0 +1,206 @@
+import itertools
+import numpy as np
+import os
+
+from copy import deepcopy
+from stable_baselines3.common.vec_env.base_vec_env import VecEnv, VecEnvWrapper
+from stable_baselines3.common.vec_env.vec_normalize import VecNormalize
+from torch.utils.tensorboard.writer import SummaryWriter
+from typing import List, Optional, Union
+
+from shared.callbacks.callback import Callback
+from shared.policy.policy import Policy
+from shared.stats import Episode, EpisodeAccumulator, EpisodesStats
+from wrappers.vec_episode_recorder import VecEpisodeRecorder
+
+
+class EvaluateAccumulator(EpisodeAccumulator):
+    def __init__(
+        self,
+        num_envs: int,
+        goal_episodes: int,
+        print_returns: bool = True,
+        ignore_first_episode: bool = False,
+    ):
+        super().__init__(num_envs)
+        self.completed_episodes_by_env_idx = [[] for _ in range(num_envs)]
+        self.goal_episodes_per_env = int(np.ceil(goal_episodes / num_envs))
+        self.print_returns = print_returns
+        if ignore_first_episode:
+            first_done = set()
+
+            def should_record_done(idx: int) -> bool:
+                has_done_first_episode = idx in first_done
+                first_done.add(idx)
+                return has_done_first_episode
+
+            self.should_record_done = should_record_done
+        else:
+            self.should_record_done = lambda idx: True
+
+    def on_done(self, ep_idx: int, episode: Episode) -> None:
+        if (
+            self.should_record_done(ep_idx)
+            and len(self.completed_episodes_by_env_idx[ep_idx])
+            >= self.goal_episodes_per_env
+        ):
+            return
+        self.completed_episodes_by_env_idx[ep_idx].append(episode)
+        if self.print_returns:
+            print(
+                f"Episode {len(self)} | "
+                f"Score {episode.score} | "
+                f"Length {episode.length}"
+            )
+
+    def __len__(self) -> int:
+        return sum(len(ce) for ce in self.completed_episodes_by_env_idx)
+
+    @property
+    def episodes(self) -> List[Episode]:
+        return list(itertools.chain(*self.completed_episodes_by_env_idx))
+
+    def is_done(self) -> bool:
+        return all(
+            len(ce) == self.goal_episodes_per_env
+            for ce in self.completed_episodes_by_env_idx
+        )
+
+
+def evaluate(
+    env: VecEnv,
+    policy: Policy,
+    n_episodes: int,
+    render: bool = False,
+    deterministic: bool = True,
+    print_returns: bool = True,
+    ignore_first_episode: bool = False,
+) -> EpisodesStats:
+    policy.eval()
+    episodes = EvaluateAccumulator(
+        env.num_envs, n_episodes, print_returns, ignore_first_episode
+    )
+
+    obs = env.reset()
+    while not episodes.is_done():
+        act = policy.act(obs, deterministic=deterministic)
+        obs, rew, done, _ = env.step(act)
+        episodes.step(rew, done)
+        if render:
+            env.render()
+    stats = EpisodesStats(episodes.episodes)
+    if print_returns:
+        print(stats)
+    return stats
+
+
+class EvalCallback(Callback):
+    def __init__(
+        self,
+        policy: Policy,
+        env: VecEnv,
+        tb_writer: SummaryWriter,
+        best_model_path: Optional[str] = None,
+        step_freq: Union[int, float] = 50_000,
+        n_episodes: int = 10,
+        save_best: bool = True,
+        deterministic: bool = True,
+        record_best_videos: bool = True,
+        video_env: Optional[VecEnv] = None,
+        best_video_dir: Optional[str] = None,
+        max_video_length: int = 3600,
+        ignore_first_episode: bool = False,
+    ) -> None:
+        super().__init__()
+        self.policy = policy
+        self.env = env
+        self.tb_writer = tb_writer
+        self.best_model_path = best_model_path
+        self.step_freq = int(step_freq)
+        self.n_episodes = n_episodes
+        self.save_best = save_best
+        self.deterministic = deterministic
+        self.stats: List[EpisodesStats] = []
+        self.best = None
+
+        self.record_best_videos = record_best_videos
+        assert video_env or not record_best_videos
+        self.video_env = video_env
+        assert best_video_dir or not record_best_videos
+        self.best_video_dir = best_video_dir
+        if best_video_dir:
+            os.makedirs(best_video_dir, exist_ok=True)
+        self.max_video_length = max_video_length
+        self.best_video_base_path = None
+
+        self.ignore_first_episode = ignore_first_episode
+
+    def on_step(self, timesteps_elapsed: int = 1) -> bool:
+        super().on_step(timesteps_elapsed)
+        if self.timesteps_elapsed // self.step_freq >= len(self.stats):
+            sync_vec_normalize(self.policy.vec_normalize, self.env)
+            self.evaluate()
+        return True
+
+    def evaluate(
+        self, n_episodes: Optional[int] = None, print_returns: Optional[bool] = None
+    ) -> EpisodesStats:
+        eval_stat = evaluate(
+            self.env,
+            self.policy,
+            n_episodes or self.n_episodes,
+            deterministic=self.deterministic,
+            print_returns=print_returns or False,
+            ignore_first_episode=self.ignore_first_episode,
+        )
+        self.policy.train(True)
+        print(f"Eval Timesteps: {self.timesteps_elapsed} | {eval_stat}")
+
+        self.stats.append(eval_stat)
+
+        if not self.best or eval_stat >= self.best:
+            strictly_better = not self.best or eval_stat > self.best
+            self.best = eval_stat
+            if self.save_best:
+                assert self.best_model_path
+                self.policy.save(self.best_model_path)
+                print("Saved best model")
+            self.best.write_to_tensorboard(
+                self.tb_writer, "best_eval", self.timesteps_elapsed
+            )
+            if strictly_better and self.record_best_videos:
+                assert self.video_env and self.best_video_dir
+                sync_vec_normalize(self.policy.vec_normalize, self.video_env)
+                self.best_video_base_path = os.path.join(
+                    self.best_video_dir, str(self.timesteps_elapsed)
+                )
+                video_wrapped = VecEpisodeRecorder(
+                    self.video_env,
+                    self.best_video_base_path,
+                    max_video_length=self.max_video_length,
+                )
+                video_stats = evaluate(
+                    video_wrapped,
+                    self.policy,
+                    1,
+                    deterministic=self.deterministic,
+                    print_returns=False,
+                )
+                print(f"Saved best video: {video_stats}")
+
+        eval_stat.write_to_tensorboard(self.tb_writer, "eval", self.timesteps_elapsed)
+
+        return eval_stat
+
+
+def sync_vec_normalize(
+    origin_vec_normalize: Optional[VecNormalize], destination_env: VecEnv
+) -> None:
+    if origin_vec_normalize is not None:
+        eval_env_wrapper = destination_env
+        while isinstance(eval_env_wrapper, VecEnvWrapper):
+            if isinstance(eval_env_wrapper, VecNormalize):
+                if hasattr(origin_vec_normalize, "obs_rms"):
+                    eval_env_wrapper.obs_rms = deepcopy(origin_vec_normalize.obs_rms)
+                eval_env_wrapper.ret_rms = deepcopy(origin_vec_normalize.ret_rms)
+            eval_env_wrapper = eval_env_wrapper.venv

shared/gae.py

@@ -0,0 +1,67 @@
+import numpy as np
+import torch
+
+from typing import NamedTuple, Sequence
+
+from shared.policy.on_policy import OnPolicy
+from shared.trajectory import Trajectory
+
+
+class RtgAdvantage(NamedTuple):
+    rewards_to_go: torch.Tensor
+    advantage: torch.Tensor
+
+
+def discounted_cumsum(x: np.ndarray, gamma: float) -> np.ndarray:
+    dc = x.copy()
+    for i in reversed(range(len(x) - 1)):
+        dc[i] += gamma * dc[i + 1]
+    return dc
+
+
+def compute_advantage(
+    trajectories: Sequence[Trajectory],
+    policy: OnPolicy,
+    gamma: float,
+    gae_lambda: float,
+    device: torch.device,
+) -> torch.Tensor:
+    advantage = []
+    for traj in trajectories:
+        last_val = 0
+        if not traj.terminated and traj.next_obs is not None:
+            last_val = policy.value(traj.next_obs)
+        rew = np.append(np.array(traj.rew), last_val)
+        v = np.append(np.array(traj.v), last_val)
+        deltas = rew[:-1] + gamma * v[1:] - v[:-1]
+        advantage.append(discounted_cumsum(deltas, gamma * gae_lambda))
+    return torch.as_tensor(
+        np.concatenate(advantage), dtype=torch.float32, device=device
+    )
+
+
+def compute_rtg_and_advantage(
+    trajectories: Sequence[Trajectory],
+    policy: OnPolicy,
+    gamma: float,
+    gae_lambda: float,
+    device: torch.device,
+) -> RtgAdvantage:
+    rewards_to_go = []
+    advantages = []
+    for traj in trajectories:
+        last_val = 0
+        if not traj.terminated and traj.next_obs is not None:
+            last_val = policy.value(traj.next_obs)
+        rew = np.append(np.array(traj.rew), last_val)
+        v = np.append(np.array(traj.v), last_val)
+        deltas = rew[:-1] + gamma * v[1:] - v[:-1]
+        adv = discounted_cumsum(deltas, gamma * gae_lambda)
+        advantages.append(adv)
+        rewards_to_go.append(v[:-1] + adv)
+    return RtgAdvantage(
+        torch.as_tensor(
+            np.concatenate(rewards_to_go), dtype=torch.float32, device=device
+        ),
+        torch.as_tensor(np.concatenate(advantages), dtype=torch.float32, device=device),
+    )

shared/module/feature_extractor.py

@@ -0,0 +1,209 @@
+import gym
+import torch
+import torch.nn as nn
+import torch.nn.functional as F
+
+from abc import ABC, abstractmethod
+from gym.spaces import Box, Discrete
+from stable_baselines3.common.preprocessing import get_flattened_obs_dim
+from typing import Dict, Optional, Type
+
+from shared.module.module import layer_init
+
+
+class CnnFeatureExtractor(nn.Module, ABC):
+    @abstractmethod
+    def __init__(
+        self,
+        in_channels: int,
+        activation: Type[nn.Module] = nn.ReLU,
+        init_layers_orthogonal: Optional[bool] = None,
+    ) -> None:
+        super().__init__()
+
+
+class NatureCnn(CnnFeatureExtractor):
+    """
+    CNN from DQN Nature paper: Mnih, Volodymyr, et al.
+    "Human-level control through deep reinforcement learning."
+    Nature 518.7540 (2015): 529-533.
+    """
+
+    def __init__(
+        self,
+        in_channels: int,
+        activation: Type[nn.Module] = nn.ReLU,
+        init_layers_orthogonal: Optional[bool] = None,
+    ) -> None:
+        if init_layers_orthogonal is None:
+            init_layers_orthogonal = True
+        super().__init__(in_channels, activation, init_layers_orthogonal)
+        self.cnn = nn.Sequential(
+            layer_init(
+                nn.Conv2d(in_channels, 32, kernel_size=8, stride=4),
+                init_layers_orthogonal,
+            ),
+            activation(),
+            layer_init(
+                nn.Conv2d(32, 64, kernel_size=4, stride=2),
+                init_layers_orthogonal,
+            ),
+            activation(),
+            layer_init(
+                nn.Conv2d(64, 64, kernel_size=3, stride=1),
+                init_layers_orthogonal,
+            ),
+            activation(),
+            nn.Flatten(),
+        )
+
+    def forward(self, obs: torch.Tensor) -> torch.Tensor:
+        return self.cnn(obs)
+
+
+class ResidualBlock(nn.Module):
+    def __init__(
+        self,
+        channels: int,
+        activation: Type[nn.Module] = nn.ReLU,
+        init_layers_orthogonal: bool = False,
+    ) -> None:
+        super().__init__()
+        self.residual = nn.Sequential(
+            activation(),
+            layer_init(
+                nn.Conv2d(channels, channels, 3, padding=1), init_layers_orthogonal
+            ),
+            activation(),
+            layer_init(
+                nn.Conv2d(channels, channels, 3, padding=1), init_layers_orthogonal
+            ),
+        )
+
+    def forward(self, x: torch.Tensor) -> torch.Tensor:
+        return x + self.residual(x)
+
+
+class ConvSequence(nn.Module):
+    def __init__(
+        self,
+        in_channels: int,
+        out_channels: int,
+        activation: Type[nn.Module] = nn.ReLU,
+        init_layers_orthogonal: bool = False,
+    ) -> None:
+        super().__init__()
+        self.seq = nn.Sequential(
+            layer_init(
+                nn.Conv2d(in_channels, out_channels, 3, padding=1),
+                init_layers_orthogonal,
+            ),
+            nn.MaxPool2d(3, stride=2, padding=1),
+            ResidualBlock(out_channels, activation, init_layers_orthogonal),
+            ResidualBlock(out_channels, activation, init_layers_orthogonal),
+        )
+
+    def forward(self, x: torch.Tensor) -> torch.Tensor:
+        return self.seq(x)
+
+
+class ImpalaCnn(CnnFeatureExtractor):
+    """
+    IMPALA-style CNN architecture
+    """
+
+    def __init__(
+        self,
+        in_channels: int,
+        activation: Type[nn.Module] = nn.ReLU,
+        init_layers_orthogonal: Optional[bool] = None,
+    ) -> None:
+        if init_layers_orthogonal is None:
+            init_layers_orthogonal = False
+        super().__init__(in_channels, activation, init_layers_orthogonal)
+        sequences = []
+        for out_channels in [16, 32, 32]:
+            sequences.append(
+                ConvSequence(
+                    in_channels, out_channels, activation, init_layers_orthogonal
+                )
+            )
+            in_channels = out_channels
+        sequences.extend(
+            [
+                activation(),
+                nn.Flatten(),
+            ]
+        )
+        self.seq = nn.Sequential(*sequences)
+
+    def forward(self, obs: torch.Tensor) -> torch.Tensor:
+        return self.seq(obs)
+
+
+CNN_EXTRACTORS_BY_STYLE: Dict[str, Type[CnnFeatureExtractor]] = {
+    "nature": NatureCnn,
+    "impala": ImpalaCnn,
+}
+
+
+class FeatureExtractor(nn.Module):
+    def __init__(
+        self,
+        obs_space: gym.Space,
+        activation: Type[nn.Module],
+        init_layers_orthogonal: bool = False,
+        cnn_feature_dim: int = 512,
+        cnn_style: str = "nature",
+        cnn_layers_init_orthogonal: Optional[bool] = None,
+    ) -> None:
+        super().__init__()
+        if isinstance(obs_space, Box):
+            # Conv2D: (channels, height, width)
+            if len(obs_space.shape) == 3:
+                cnn = CNN_EXTRACTORS_BY_STYLE[cnn_style](
+                    obs_space.shape[0],
+                    activation,
+                    init_layers_orthogonal=cnn_layers_init_orthogonal,
+                )
+
+                def preprocess(obs: torch.Tensor) -> torch.Tensor:
+                    if len(obs.shape) == 3:
+                        obs = obs.unsqueeze(0)
+                    return obs.float() / 255.0
+
+                with torch.no_grad():
+                    cnn_out = cnn(preprocess(torch.as_tensor(obs_space.sample())))
+                self.preprocess = preprocess
+                self.feature_extractor = nn.Sequential(
+                    cnn,
+                    layer_init(
+                        nn.Linear(cnn_out.shape[1], cnn_feature_dim),
+                        init_layers_orthogonal,
+                    ),
+                    activation(),
+                )
+                self.out_dim = cnn_feature_dim
+            elif len(obs_space.shape) == 1:
+
+                def preprocess(obs: torch.Tensor) -> torch.Tensor:
+                    if len(obs.shape) == 1:
+                        obs = obs.unsqueeze(0)
+                    return obs.float()
+
+                self.preprocess = preprocess
+                self.feature_extractor = nn.Flatten()
+                self.out_dim = get_flattened_obs_dim(obs_space)
+            else:
+                raise ValueError(f"Unsupported observation space: {obs_space}")
+        elif isinstance(obs_space, Discrete):
+            self.preprocess = lambda x: F.one_hot(x, obs_space.n).float()
+            self.feature_extractor = nn.Flatten()
+            self.out_dim = obs_space.n
+        else:
+            raise NotImplementedError
+
+    def forward(self, obs: torch.Tensor) -> torch.Tensor:
+        if self.preprocess:
+            obs = self.preprocess(obs)
+        return self.feature_extractor(obs)

shared/module/module.py

@@ -0,0 +1,40 @@
+import numpy as np
+import torch.nn as nn
+
+from typing import Sequence, Type
+
+
+def mlp(
+    layer_sizes: Sequence[int],
+    activation: Type[nn.Module],
+    output_activation: Type[nn.Module] = nn.Identity,
+    init_layers_orthogonal: bool = False,
+    final_layer_gain: float = np.sqrt(2),
+) -> nn.Module:
+    layers = []
+    for i in range(len(layer_sizes) - 2):
+        layers.append(
+            layer_init(
+                nn.Linear(layer_sizes[i], layer_sizes[i + 1]), init_layers_orthogonal
+            )
+        )
+        layers.append(activation())
+    layers.append(
+        layer_init(
+            nn.Linear(layer_sizes[-2], layer_sizes[-1]),
+            init_layers_orthogonal,
+            std=final_layer_gain,
+        )
+    )
+    layers.append(output_activation())
+    return nn.Sequential(*layers)
+
+
+def layer_init(
+    layer: nn.Module, init_layers_orthogonal: bool, std: float = np.sqrt(2)
+) -> nn.Module:
+    if not init_layers_orthogonal:
+        return layer
+    nn.init.orthogonal_(layer.weight, std)  # type: ignore
+    nn.init.constant_(layer.bias, 0.0)  # type: ignore
+    return layer