对Python3 * 和 ** 运算符详解

> 2 * 5
10
> 2 ** 5
32

> def fun(*args, **kwargs):
...  print('args=', args)
...  print('kwargs=', kwargs)
... 
> fun(1, 2, 3, 4, A='a', B='b', C='c', D='d')
args= (1, 2, 3, 4)
kwargs= {'A': 'a', 'B': 'b', 'C': 'c', 'D': 'd'}

> def fun(name, *args):
...  print('你好:', name)
...  for i in args:
...   print("你的宠物有:", i)
... 
> fun("Geek", "dog", "cat")
你好: Geek
你的宠物有: dog
你的宠物有: cat

> def fun(**kwargs):
...  for key, value in kwargs.items():
...   print("{0} 喜欢 {1}".format(key, value))
... 
> fun(Geek="cat", cat="box")
Geek 喜欢 cat
cat 喜欢 box

> def fun(data1, data2, data3):
...  print("data1: ", data1)
...  print("data2: ", data2)
...  print("data3: ", data3)
... 
> args = ("one", 2, 3)
> fun(*args)
data1: one
data2: 2
data3: 3
> kwargs = {"data3": "one", "data2": 2, "data1": 3}
> fun(**kwargs)
data1: 3
data2: 2
data3: one

> a, b, *c = 0, 1, 2, 3 
> a 
0 
> b 
1 
> c 
[2, 3]