__init__.py 文件源码

def __eq__(self, other):
        if not isinstance(other, type(self)):
            return NotImplemented
        else:
            # Compare sets because order doesn't matter (foo&bar|baz is the
            # same as baz|bar&foo). Use frozensets because sets are not
            # hashable.
            self_fc_sets = set(frozenset(x) for x in self._filterchains)
            other_fc_sets = set(frozenset(x) for x in other._filterchains)
            return self_fc_sets == other_fc_sets