Python错误:未指定主机

问题描述

我只是写了一个简单的python演示，却遇到了一个令人困惑的问题.

I just wrote a simple python demo,while met a confusing problem.

import requests

print(requests.get('http://www.sina.com.cn/'))

我知道正确的结果是返回Response [200].但是在我的WIN10 x64中，它返回以下错误，我想我的计算机可能会出现一些问题.

I know that right result is return Response [200].But in my WIN10 x64,it returns the following error,I guess maybe some problems occur in my computer.

Traceback (most recent call last):
  File "C:\Users\CJY\Desktop\Python_Demo\web.py", line 2, in <module>
    print(requests.get('http://www.sina.com.cn/'))
  File "D:\python3.6.1\lib\site-packages\requests\api.py", line 72, in get
    return request('get', url, params=params, **kwargs)
  File "D:\python3.6.1\lib\site-packages\requests\api.py", line 58, in request
    return session.request(method=method, url=url, **kwargs)
  File "D:\python3.6.1\lib\site-packages\requests\sessions.py", line 518, in request
    resp = self.send(prep, **send_kwargs)
  File "D:\python3.6.1\lib\site-packages\requests\sessions.py", line 639, in send
    r = adapter.send(request, **kwargs)
  File "D:\python3.6.1\lib\site-packages\requests\adapters.py", line 403, in send
    conn = self.get_connection(request.url, proxies)
  File "D:\python3.6.1\lib\site-packages\requests\adapters.py", line 302, in get_connection
    conn = proxy_manager.connection_from_url(url)
  File "D:\python3.6.1\lib\site-packages\requests\packages\urllib3\poolmanager.py", line 279, in connection_from_url
    pool_kwargs=pool_kwargs)
  File "D:\python3.6.1\lib\site-packages\requests\packages\urllib3\poolmanager.py", line 408, in connection_from_host
    self.proxy.host, self.proxy.port, self.proxy.scheme, pool_kwargs=pool_kwargs)
  File "D:\python3.6.1\lib\site-packages\requests\packages\urllib3\poolmanager.py", line 218, in connection_from_host
    raise LocationValueError("No host specified.")
requests.packages.urllib3.exceptions.LocationValueError: No host specified.
[Finished in 0.2s]

请帮助我！

推荐答案

错误位置:

Lib\urllib\request.py：
proxyEnable = winreg.QueryValueEx(internetSettings, 'ProxyEnable')[0]

如果 proxyEnable 是字符串，则会看到错误.原因是在您的注册表中，ProxyEnable设置为REG_SZ而不是REG_DWORD，因此进行更改就可以了.打开注册表:

if proxyEnable is string , you'll see the error. The reason is in your registry, ProxyEnable is set as REG_SZ but not REG_DWORD, so change it and all is ok.open the registry:

(您也可以直接搜索ProxyEnable)

（you can also directly search ProxyEnable）

删除ProxyEnable创建一个新的ProxyEnable表单(REG_SZ 0)到(REG_DWORD 0x00000000(0))

delete ProxyEnablecreate a new ProxyEnable form (REG_SZ 0) to (REG_DWORD 0x00000000(0))

请参见后面的图片，我的PC语言是中文，但是ProxyEnable的位置是相同的.

see follow pictures,my pc language is chinese, but the location for ProxyEnable is the same.

ProxyEnable的正确值

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