*args和**kwargs

def foo(*args, **kwargs):

　　print(args, kwargs)

1 foo(x=1)
2 foo(1)
3 foo({"x": 1})
4 foo(**{"x": 1})
  dic = {"x": 1}
5 foo(dic)
6 foo(**dic)

結果：

1 () {'x': 1}
2 (1,) {}
3 ({'x': 1},) {}
4 () {'x': 1}
5 ({'x': 1},) {}
6 () {'x': 1}