urllib库的使用

#使用urllib库，将langlang2017全站网页请求并保存
#1、引入模块
from urllib import request
from urllib import error#2、操作
#（1）创建url
base_url = "http://www.langlang2017.com/route.html"try:# （2）请求urlreponse = request.urlopen(base_url,timeout=0.02)# (3)读取内容html = reponse.read()# （4）转码html = html.decode("utf-8")# （5）保存with open("route.html", "w", encoding="utf-8") as f:f.write(html)except error.URLError as e:print(e)