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\n" %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))
 """