Method find_best

mypy/suggestions.py:450–459

From a list of possible function types, find the best one. For best, we want the fewest errors, then the best "score" from score_callable.

(self, func: FuncDef, guesses: list[CallableType])

        ]

    def find_best(self, func: FuncDef, guesses: list[CallableType]) -> tuple[CallableType, int]:
        """From a list of possible function types, find the best one.

        For best, we want the fewest errors, then the best "score" from score_callable.
        """
        if not guesses:
            raise SuggestionFailure("No guesses that match criteria!")
        errors = {guess: self.try_type(func, guess) for guess in guesses}
        best = min(guesses, key=lambda s: (count_errors(errors[s]), self.score_callable(s)))
        return best, count_errors(errors[best])

    def get_guesses_from_parent(self, node: FuncDef) -> list[CallableType]:
        """Try to get a guess of a method type from a parent class."""