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"""
Poor Man's Configurator. Probably a terrible idea. Example usage:
$ python train.py config/override_file.py --batch_size=32
this will first run config/override_file.py, then override batch_size to 32
The code in this file will be run as follows from e.g. train.py:
>>> exec(open('configurator.py').read())
So it's not a Python module, it's just shuttling this code away from train.py
The code in this script then overrides the globals()
I know people are not going to love this, I just really dislike configuration
complexity and having to prepend config. to every single variable. If someone
comes up with a better simple Python solution I am all ears.
"""
import sys
from ast import literal_eval
for arg in sys.argv[1:]:
if '=' not in arg:
# assume it's the name of a config file
assert not arg.startswith('--')
config_file = arg
print(f"Overriding config with {config_file}:")
with open(config_file) as f:
print(f.read())
exec(open(config_file).read())
else:
# assume it's a --key=value argument
assert arg.startswith('--')
key, val = arg.split('=')
key = key[2:]
if key in globals():
try:
# attempt to eval it it (e.g. if bool, number, or etc)
attempt = literal_eval(val)
except (SyntaxError, ValueError):
# if that goes wrong, just use the string
attempt = val
# ensure the types match ok
assert type(attempt) == type(globals()[key])
# cross fingers
print(f"Overriding: {key} = {attempt}")
globals()[key] = attempt
else:
raise ValueError(f"Unknown config key: {key}")
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