可变参数

函数不确定时候，使用可变参数，有2种方式*args和*kwargs，*args没有key值，*kwargs有key值,*args必须位于**kwargs之前 .

def test_args(first,*num):
    print(first)
    for x in num:
        print(x)

test_args(True,[0],3,'a')

def test_kwargs(first,*num,**money):
    print(first)
    for a in num:
        print(a)
    for k,v in money.items():
        print('key is %s,value is %s' % (k,v))

test_kwargs(1,2,3,aa=1,bb='c')