python函数星号参数详解

>>> def print_param(x, y, z = 3, *pospar, **keypar):
    print x,y,z
    print pospar
    print keypar
   
>>> print_param(3,4,5,6,7,8,m = 1,n = 2)
3 4 5
(6, 7, 8)
{'m': 1, 'n': 2}

>>> def add(x,y):
    print x,y
    return x + y
   
>>> add(*param)
1 2
3
   
>>> def test(name,age):
    print name,age
   
>>> m = {'name':'xiaoli','age':'12'}
>>> test(**m)
xiaoli 12
>>> m = {'name':'xiaoli','age':12}
>>> test(**m)
xiaoli 12