sortedset.py 文件源码

def _make_cmp(set_op, doc):
        def comparer(self, that):
            if isinstance(that, SortedSet):
                return set_op(self._set, that._set)
            elif isinstance(that, Set):
                return set_op(self._set, that)
            else:
                raise TypeError('can only compare to a Set')

        comparer.__name__ = '__{0}__'.format(set_op.__name__)
        comparer.__doc__ = 'Return True if and only if ' + doc

        return comparer