odict.py 文件源码

def __le__(self, other):
        """
        >>> d = OrderedDict(((1, 3), (3, 2), (2, 1)))
        >>> c = OrderedDict(((0, 3), (3, 2), (2, 1)))
        >>> e = OrderedDict(d)
        >>> c <= d
        True
        >>> d <= c
        False
        >>> d <= dict(c)
        Traceback (most recent call last):
        TypeError: Can only compare with other OrderedDicts
        >>> d <= e
        True
        """
        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())