Python之路 day3 函数定义 *args及**kwargs

#!/usr/bin/env python
# -*- coding:utf-8 -*- 
#Author:ersa

import time

# def logger():
#     time_format = "%Y-%m-%d %X"
#     time_current = time.strftime(time_format)
#     with open("log.txt", 'a+') as f:
#         f.write("%s end action
" %time_current)
#
# def test(x,y,z=9):
#     print("x = %s"%x)
#     print("y = %s" %y)
#     print("z = %s" %z)

#函数参数说明，位置参数 与形参一一对应
# test(1,2)   #位置参数与形参一一对应
# test(y=2,x=1)   #y=2,x=1关键字参数调用与形参顺序无关
#test(x=2,3)
#既有关键字，又有位置的时候，一定要按照位置关系对应
#关键字参数不能写在位置参数前面

#默认参数特点：挑用函数的时候，默认参数非必传

#实参个数不确定的情况下，形参以* 开头定义变量名，将实参转化为元组
#*args： 接受n个位置参数，转换成元组的形式
# def tests(*args):
#     print(args)
#
# tests(1,2,3,4,5)
# tests(*[1,2,3,4,5]) #args=tuple([1,2,3,4,5])
#
#
# def tests1(x,*args):
#     print(x)
#     print(args)
# tests1(1,2,3,4,5)

#字典作为函数形参,**kwargs:把n个关键字参数转换成字典的方式
#**kwargs 以字典的方式接收参数,字典参数组必须放到后面
# def test_dic(name,age=18,**kwargs):
#     print(name)
#     print(age)
#     print(kwargs)
#
# test_dic('alex',sex='F',hobby='tesla')


def args_kwargs(name,age=18,*args,**kwargs):
    print(name)
    print(age)
    print(args)
    print(kwargs)

args_kwargs('alex',34,sex='m',hobby='tesla')

"""
def test1():
    print("in the test1")
    logger()
    return 0

def test2():
    print("in the test2")
    logger()

def test3():
    print("in the test3")
    logger()
    return 1,10,"ersa",['ersa','ma']

x = test1()
y = test2()
z = test3()

print(x)
print("from test1 return is [%s]"%type(x))
print(y)
print("from test2 return is [%s]"%type(y))
print(z)
print("from test3 return is [%s]"%type(z))
"""