not enough values to unpack 问题

python小白呀

import urllib.request

url = 'http://ip.chinaz.com/getip.aspx'

proxy_support = urllib.request.ProxyHandler({'http':'112.74.143.7:80'})

opener = urllib.request.build_opener(proxy_support)
opener.addheaders =[{'User-Agent':'Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36'}]

urllib.request.install_opener(opener)

response = urllib.request.urlopen(url)
html = response.read().decode('utf-8')

print(html)


这个运行出来显示：
Traceback (most recent call last):
  File "F:\python\python例子\小甲鱼练习\爬虫\proxy_eg.py", line 12, in <module>
    response = urllib.request.urlopen(url)
  File "F:\python\pythonInstall\lib\urllib\request.py", line 222, in urlopen
    return opener.open(url, data, timeout)
  File "F:\python\pythonInstall\lib\urllib\request.py", line 523, in open
    req = meth(req)
  File "F:\python\pythonInstall\lib\urllib\request.py", line 1268, in do_request_
    for name, value in self.parent.addheaders:
ValueError: not enough values to unpack (expected 2, got 1)


请问各位大佬，程序都是照着小甲鱼的写的，为什么会有这个错误？萌新表示不懂。

塔利班

opener.addheaders =[('User-Agent':'Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36')]
是括号不是大括号

python小白呀

塔利班 发表于 2018-10-20 22:04
opener.addheaders =[('User-Agent':'Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, li ...

恩恩，改过来就可以了，但是一直是Error502，依旧上不去代理

塔利班

那是代理的问题

python小白呀

塔利班 发表于 2018-10-20 22:22
那是代理的问题

恩恩，谢过大佬！