闭包函数

# _*_ coding: utf-8 _*_
# 闭包函数：
# 闭包的意义：返回的函数对象，不仅仅是一个函数对象，在该函数外还包裹了一层作用域，这使得，该函数无论在何处调用，优先使用自己外层包裹的作用域
# 应用领域：延迟计算（原来我们是传参，现在我们是包起来）

# def outter():
#     x=1
#     def inner():
#         print('from inner',x)
#     return inner
# 
# 
# f=outter()
# 
# def foo():
#     # print(outter)
#     print(f)
#     x=111111111111111111111111111111111111  #定义阶段
#     f()
# foo()
# 为函数体传值的两种方式
# def foo():
#     print('hello %s' %name)
# 
# 方式一:直接以参数的形式传入
# def foo(name):
#     print('hello %s' %name)
# 
# foo('egon')
# foo('egon')
# foo('egon')

# 方式二:闭包函数
# def outter(name):
#     # name='egon'
#     def foo():
#         print('hello %s' %name)
#     return foo
# 
# f=outter('egon')
# # print(f)
# f()
# f()
# f()
# 
# f1=outter('alex')
# f1()
# f1()
# f1()

# pip3 install requests
# import requests

# 问题
# def get():
#     response=requests.get(url)
#     if response.status_code == 200:
#         print(response.text)

# 解决方案一:
# def get(url):
#     response=requests.get(url)
#     if response.status_code == 200:
#         print(response.text)
#
# get('https://www.baidu.com')
# get('https://www.baidu.com')
# get('https://www.baidu.com')

# 解决方案二:

# def outter(url):
#     # url='https://www.baidu.com'
#     def get():
#         response=requests.get(url)
#         if response.status_code == 200:
#             print(response.text)
#     return get
#
# baidu=outter('https://www.baidu.com')
# cnblogs=outter('https://www.cnblogs.com')