_bind_processors

compiler.py

    @util.memoized_property
    def _bind_processors(self):
        return dict(
            (key, value)
            for key, value in (
                (
                    self.bind_names[bindparam],
                    bindparam.type._cached_bind_processor(self.dialect)
                    if not bindparam._expanding_in_types
                    else tuple(
                        elem_type._cached_bind_processor(self.dialect)
                        for elem_type in bindparam._expanding_in_types
                    ),
                )
                for bindparam in self.bind_names
            )
            if value is not None
        )