odict.py 文件源码

def __lt__(self, other):
        """
        >>> d = OrderedDict(((1, 3), (3, 2), (2, 1)))
        >>> c = OrderedDict(((0, 3), (3, 2), (2, 1)))
        >>> c < d
        True
        >>> d < c
        False
        >>> d < dict(c)
        Traceback (most recent call last):
        TypeError: Can only compare with other OrderedDicts
        """
        if not isinstance(other, OrderedDict):
            raise TypeError('Can only compare with other OrderedDicts')
        # FIXME: efficiency?
        #   Generate both item lists for each compare
        return (self.items() < other.items())