Issue: value error in BooleanOutputParser

[ARSblithe212]

Issue you'd like to raise.

when use the BooleanOutputParser in the chain_filter.py, the LLMs output 'yes|no'，the function 'parse' will throw ValueError。

Suggestion:

I fix it,as follows:

def parse(self, text: str) -> bool:
"""Parse the output of an LLM call to a boolean.

    Args:
        text: output of language model

    Returns:
        boolean

    """
    cleaned_text = text.upper().strip()
    if cleaned_text not in (self.true_val, self.false_val):
        raise ValueError(
            f"BooleanOutputParser expected output value to either be "
            f"{self.true_val} or {self.false_val}. Received {cleaned_text}."
        )
    return cleaned_text == self.true_val

[dosubot]

Hi, @ARSblithe212! I'm Dosu, and I'm here to help the LangChain team manage their backlog. I wanted to let you know that we are marking this issue as stale.

From what I understand, you reported an issue regarding the BooleanOutputParser in chain_filter.py. It seems that when the LLMs output 'yes|no', a ValueError is thrown. The suggested fix is to modify the 'parse' function to check if the cleaned text is either the true value or the false value, and raise a ValueError if it is not.

Since there hasn't been any activity on this issue, we wanted to check with you if it is still relevant to the latest version of the LangChain repository. If it is, please let us know by commenting on the issue. Otherwise, feel free to close the issue yourself, or it will be automatically closed in 7 days.

Thank you for your understanding and contribution to the LangChain project!