python-基础-函数

>>> def fun(a, b, *args, **kwargs):
...     """可变参数演示示例"""
...     print "a =", a
...     print "b =", b
...     print "args =", args
...     print "kwargs: "
...     for key, value in kwargs.items():
...         print key, "=", value
...
>>> fun(1, 2, 3, 4, 5, m=6, n=7, p=8)  # 注意传递的参数对应
a = 1
b = 2
args = (3, 4, 5)
kwargs: 
p = 8
m = 6
n = 7
>>>
>>>
>>>
>>> c = (3, 4, 5)
>>> d = {"m":6, "n":7, "p":8}
>>> fun(1, 2, *c, **d)    # 注意元组与字典的传参方式
a = 1
b = 2
args = (3, 4, 5)
kwargs: 
p = 8
m = 6
n = 7
>>>
>>>
>>>
>>> fun(1, 2, c, d) # 注意不加星号与上面的区别
a = 1
b = 2
args = ((3, 4, 5), {‘p‘: 8, ‘m‘: 6, ‘n‘: 7})
kwargs:
>>>
>>>