python-不定长函数参数*args*返回元组*kwargs返回字典

def sumF(a,b,*args,**kwargs):
    print(a)
    print(b)
    print(args)
    print(kwargs)
sumF(1,2,3,4,5,name="tom",age=18)

1
2
(3, 4, 5)
{‘name’: ‘tom’, ‘age’: 18}

为什么kwargs为空

def sumF(a,b,*args,**kwargs):
    print(a)
    print(b)
    print(args)
    print(kwargs)

list1 = (4,5)
dict1 = {"name":"tom","age":18}
sumF(1,2,3,list1,dict1)

1
2
(3, (4, 5), {‘name’: ‘tom’, ‘age’: 18})
{}

这样就不为空了传入时加*args **kwargs

def sumF(a,b,*args,**kwargs):
    print(a)
    print(b)
    print(args)
    print(kwargs)

list1 = (4,5)
dict1 = {"name":"tom","age":18}
sumF(1,2,3,*list1,**dict1)

1
2
(3, 4, 5)
{‘name’: ‘tom’, ‘age’: 18}