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函数.py
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函数.py
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#! /usr/bin/env python
# -*- coding: utf-8 -*-
# __author__ = "Bonnie Li"
# Email: [email protected]
# Date: 4/9/18
#默认参数
# def stu_register(name,age,course = 'python',country = 'CN'):
# print('registration info....')
# print(name,age,country,course)
#
# stu_register('alex',22)
# stu_register('bonnie',23,'java')
#关键参数
# def stu_register(name,course,age,country = 'cn'):
# print('registration info....')
# print(name,age,country,course)
#
#
# stu_register('bonnie','C',age=28)
#包裹参数
# def stu_register(name,*args):
# print('registration info....')
# print(name,*args)
#
#
# stu_register('bonnie',*['python','java','c'])
#
# stu_register('bonnie','python','java','c')
#
# #如果参数中出现*args,传递的参数个数不是固定的，传来过的数是远祖
#**args
# def stu_register(name,*args,**kwargs):
# print('registration info....')
# print(name,args,kwargs)
#
# d={'degree':'primary school'}
# stu_register('bonnie',*['python','java','c'],**d)
#函数返回值, 遇到return 代表函数的终止,
#返回多个值会自动转成元组
# def stu_register(name,course,age):
# print('registration info....')
# print(name,course,age)
# # if age >22:
# # return 'your age is too older'
# # else:
# # return True
# return name,age
#
#
# status=stu_register('bonnie','C',age=28)
# print(status)
#局部变量 就是定义再函数里的变量
#全局变量是定义再函数外边，或者可以说是以一级代码
#再函数内部，可以引用全局变量
#全局变量和局部变量同时在，局部变量优先级高
# name = 'bonnie'
#
# def change_name():
# global name #不建议你在函数里修改全局变量
# name = '花花'
# print('you name is %s ' %name)
#
# change_name()
# print(name)
# 改列表，可以通过改值实现，但是不能重新赋值
# names = ['alex','black girl','peiqi']
#
# def change_name():
# del names[2]
# # names = ['alex','black girl']
# print(names)
#
# change_name()
# print(names)
#嵌套函数
#由内向外一层一层找变量
# def func1():
# print('alex')
#
# def func2(): #不调用的话，只是把函数放入内存，并没有调用的话就不会执行
# print('eric')
# func2()
# func1()
# age = 18
# def func1():
# # age =73
# #print(age)
#
# def func2(): #不调用的话，只是把函数放入内存，并没有调用的话就不会执行
# # age = 84
# print(age)
# age =73
# func2()
#
# func1()
#递归总结
#匿名函数
# data = list(range(10))
#
#
# print(list(filter(lambda n: n if n%2 ==1 else False, data)))
#
# level = 'L0'
# n = 22
#
#
# def func():
# level = 'L1'
# n = 33
# print(locals())
#
# def outer():
# n = 44
# level = 'L2'
# print(locals(),n)
#
# def inner():
# level = 'L3'
# print(locals(),n) #此外打印的n是多少？
# inner()
# outer()
#
#
# func()