datastructures.py 文件源码

def __init__(*args, **kwargs):
        if not args:
            raise TypeError("descriptor '__init__' of 'UserDict' object "
                            "needs an argument")
        self, *args = args
        if len(args) > 1:
            raise TypeError('expected at most 1 arguments, got %d' % len(args))
        if args:
            dict_ = args[0]
        elif 'dict' in kwargs:
            dict_ = kwargs.pop('dict')
            import warnings
            warnings.warn("Passing 'dict' as keyword argument is deprecated",
                          DeprecationWarning, stacklevel=2)
        else:
            dict_ = None
        self.data = {}
        if dict_ is not None:
            self.data.update(dict_)
        if len(kwargs):
            self.data.update(kwargs)