Method cleanse

mypy/binder.py:289–293

Remove all references to a Node from the binder.

(self, expr: Expression)

        return any(f.suppress_unreachable_warnings for f in self.frames)

    def cleanse(self, expr: Expression) -> None:
        """Remove all references to a Node from the binder."""
        key = literal_hash(expr)
        assert key is not None, "Internal error: binder tried cleanse non-literal"
        self._cleanse_key(key)

    def _cleanse_key(self, key: Key) -> None:
        """Remove all references to a key from the binder."""