关于函数可变参数

 1 def test(a, b, c, d):
 2     print a, b, c, d
 3     return "->".join([str(a), str(b), str(c), str(d)])
 4 
 5 def test1(a, b, c, d):
 6     print a, b, c, d
 7     return "->".join([str(a), str(b), str(c), str(d)])
 8 
 9 
10 def test2(*args, **kwargs):
11     print "args: " + str(args)
12     print "kwargs: " +　str(kwargs)
13 
14 def main():
15     param = [1,2,3,4]
16     param1 = {
17         "a":1,
18         "b":2,
19         "c":3,
20         "d":4,
21     }
22     
23     print test(*param)
24     print test1(**param1)
25     print test2(*param, **param1)
26 
27 if __name__ == '__main__':
28     main()

test_args.py
1 2 3 4
1->2->3->4
1 2 3 4
1->2->3->4
args: (1, 2, 3, 4)
kwargs: {'a': 1, 'c': 3, 'b': 2, 'd': 4}
None