形参和实参

# -*- coding: utf-8 -*-
def test1(x,y):#x,y为形参
    print(x)
    print(y)

test1(1,2)    #1,2为实参

def test2(x=1,y=2):#默认参数
    pass


def test3(*args):#参数组
    print(args)

test3(1,2,3,4,5,6,7)#不固定参数个数时用参数组,元组形式
test3(*[1,2,3,4,5,6,7])#args=tuple([1,2,3,4,5,6,7])元组形式


def test4(x,*args):#形参+参数组
    print(x)
    print(args)

test4(1,2,3,4,5,6,7)

def test5(**kwargs):#把N个关键字参数转换成字典
    print(kwargs)
    print(kwargs["name"])
    print(kwargs["age"])


test5(name="hekaiqiao",age=5)