检测网页是否正常打开 原

import urllib.request   import time   opener = urllib.request.build_opener()   opener.addheaders = [('User-agent', 'Mozilla/49.0.2')]   #这个是你放网址的文件名，改过来就可以了   # file = open('test.txt')   # lines = file.readlines()   aa=['http://www.jd.com/','https://top.jd.com/?cateId=794&itemId=6254701']   # for line in lines:   #     temp=line.replace('\n','')   #     aa.append(temp)   # print(aa)   print('开始检查：')   for a in aa:       tempUrl = a       try :           opener.open(tempUrl)           print(tempUrl+'没问题')       except urllib.error.HTTPError:           print(tempUrl+'=访问页面出错')           time.sleep(2)       except urllib.error.URLError:           print(tempUrl+'=访问页面出错')           time.sleep(2)       time.sleep(0.1)  

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