@_recursive_repr
    def __repr__(self):
        if not self:
            return '%s()' % (self.__class__.__name__,)
        return '%s(%r)' % (self.__class__.__name__, self.items())
od.__repr__() <==> repr(od)
dataset/ETHPy150Open baseblack/ReproWeb/3rdParty/python/ordereddict.py/OrderedDict.__repr__