python-函数参数

>>> def  test1(x,y,z=10):
    print(x,y,z)
    return x+y+z

>>> print(‘三个数的总和为%s‘%test1(1,5))
1 5 10
三个数的总和为16
>>>  

>>> def test2(x,z=20,y):
    print(x,y,z)
    
SyntaxError: non-default argument follows default argument

>>> def test1(x,y,*args):
    print(x,y)
    print(args)
    sum =x+y
    for  i  in args:
        sum+=1
    print(sum)

    
>>> test1(2,3,5,5)
2 3
(5, 5)#args数据类型为元组
7

def test1(x,y,*args,z=10):
    print(x,y)
    print(args)
    sum= x+y+z
    for  i  in args:
        sum+=i
    print("和为%s"%sum)
test1(215,123,23,1351,z=20)

215 123
(23, 1351)
和为1732