python中函数的不定长参数

＃定义一个含有不定长参数的函数，本例第三个参数*args
def sum_nums(a,b,*args):
    print(‘_‘*30)
    print(a)
    print(b)
    print(args)

＃调用函数：
sum_nums(11,22,33,44,55,66,77)
sum_nums(11,22,33)
sum_nums(11,22)
sum_nums(11)#错误调用，传递的参数不够

＃输出结果：
______________________________
11
22
(33, 44, 55, 66, 77)
______________________________
11
22
(33,)
______________________________
11
22
()
Traceback (most recent call last):
  File "6.py", line 10, in <module>
    sum_nums(11)#错误调用
TypeError: sum_nums() missing 1 required positional argument: ‘b‘

原文地址：https://www.cnblogs.com/littlesuns/p/9955068.html