Method maybe_increment_lambda_arguments

src/black/brackets.py:188–199

In a lambda expression, there might be more than one argument. To avoid splitting on the comma in this situation, increase the depth of tokens between `lambda` and `:`.

(self, leaf: Leaf)

        return False

    def maybe_increment_lambda_arguments(self, leaf: Leaf) -> bool:
        """In a lambda expression, there might be more than one argument.

        To avoid splitting on the comma in this situation, increase the depth of
        tokens between `lambda` and `:`.
        """
        if leaf.type == token.NAME and leaf.value == "lambda":
            self.depth += 1
            self._lambda_argument_depths.append(self.depth)
            return True

        return False

    def maybe_decrement_after_lambda_arguments(self, leaf: Leaf) -> bool:
        """See `maybe_increment_lambda_arguments` above for explanation."""