Method _get_comparator

lib/sqlalchemy/ext/hybrid.py:1741–1771

(
        self, comparator: Any
    )

        return self._get_comparator(_expr)

    def _get_comparator(
        self, comparator: Any
    ) -> Callable[[Any], _HybridClassLevelAccessor[_T]]:
        proxy_attr = attributes._create_proxied_attribute(self)

        def expr_comparator(
            owner: Type[object],
        ) -> _HybridClassLevelAccessor[_T]:
            # because this is the descriptor protocol, we don't really know
            # what our attribute name is.  so search for it through the
            # MRO.
            for lookup in owner.__mro__:
                if self.__name__ in lookup.__dict__:
                    if lookup.__dict__[self.__name__] is self:
                        name = self.__name__
                        break
            else:
                name = attributes._UNKNOWN_ATTR_KEY  # type: ignore[assignment,unused-ignore]  # noqa: E501

            return cast(
                "_HybridClassLevelAccessor[_T]",
                proxy_attr(
                    owner,
                    name,
                    self,
                    comparator(owner),
                    doc=comparator.__doc__ or self.__doc__,
                ),
            )

        return expr_comparator


class Comparator(interfaces.PropComparator[_T]):