python 函数 闭包 (节省内存空间 html 获取网页的源码)

时间:2022-12-16 16:08:40
#闭包:嵌套函数,内部函数调用外部函数的变量
# def outer():
# a = 1
# def inner():
# print(a)
# inner()
# outer() def outer():
a = 1
def inner():
print(a)
return inner
inn = outer()
inn() # import urllib #模块
from urllib.request import urlopen
# ret = urlopen('http://www.xiaohua100.cn/index.html').read()
# print(ret)
# def get_url():
# url = 'http://www.xiaohua100.cn/index.html'
# ret = urlopen(url).read()
# print(ret)
#
# get_url() def get_url():
url = 'http://www.xiaohua100.cn/index.html'
def get():
ret = urlopen(url).read()# 获取网页的源码
print(ret)
return get#返回函数 get_func = get_url()#函数接收
get_func()#输出 调用