http://www.cnblogs.com/tips4python/archive/2011/05/30/function_with_stay.html

1 def function_with_one_star(*t):
2     print(t, type(t))
3  
4 def function_with_two_stars(**d)
5     print(d, type(d))

1 function_with_one_star(1, 2, 3)
2 function_with_two_stars(a = 1, b = 2, c = 3)

(1, 2, 3) <class ‘tuple‘>
{‘a‘: 1, ‘c‘: 3, ‘b‘: 2} <class ‘dict‘>