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# + tags=["hide_inp"]
desc = """
### Backtrack on Failure

Chain that backtracks on failure. [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/srush/MiniChain/blob/master/examples/backtrack.ipynb)

"""
# -

# $
from minichain import prompt, Mock, show, OpenAI
import minichain

@prompt(Mock(["dog", "blue", "cat"]))
def prompt_generation(model):
    return model("")

@prompt(OpenAI(), template="Answer 'yes' is {{query}} is a color. Answer:")
def prompt_validation(model, x):
    out = model(dict(query=x))
    if out.strip().lower().startswith("yes"):
        return x
    return model.fail(1)
    
def run():
    x = prompt_generation()
    return prompt_validation(x)
# $

gradio = show(run,
            examples = [],
            subprompts=[prompt_generation, prompt_validation],
            code=open("backtrack.py", "r").read().split("$")[1].strip().strip("#").strip(),
            out_type="markdown"
            )

if __name__ == "__main__":
    gradio.launch()