每次我使用 pip 时都会出现“AttributeError：'NoneType'”

Posted 2023-02-23

【中文标题】每次我使用 pip 时都会出现“AttributeError：\'NoneType\'”

【英文标题】："AttributeError: 'NoneType'" shows up everytime I use pip每次我使用 pip 时都会出现“AttributeError：'NoneType'”

【发布时间】：2017-09-11 14:30:57

【问题描述】：

我可以安装***但不能使用“pip install 'module'”，就像我不能从互联网上安装那些模块一样。

错误

AttributeError: 'NoneType' 对象没有属性 'startswith'

尽管有 tensorflow，但 pip 无法安装“requests”或“numpy”等常用模块。

C:\Users\Think>pip install tensorflow
Collecting tensorflow
Exception:
Traceback (most recent call last):
File "D:\Anaconda3\lib\site-packages\pip\basecommand.py", line 215, in main
    status = self.run(options, args)
File "D:\Anaconda3\lib\site-packages\pip\commands\install.py", line 335, in 
    run
    wb.build(autobuilding=True)
File "D:\Anaconda3\lib\site-packages\pip\wheel.py", line 749, in build
    self.requirement_set.prepare_files(self.finder)
File "D:\Anaconda3\lib\site-packages\pip\req\req_set.py", line 380, in 
    prepare_files
ignore_dependencies=self.ignore_dependencies))
File "D:\Anaconda3\lib\site-packages\pip\req\req_set.py", line 554, in 
    _prepare_file
require_hashes
File "D:\Anaconda3\lib\site-packages\pip\req\req_install.py", line 278, in 
    populate_link
    self.link = finder.find_requirement(self, upgrade)
File "D:\Anaconda3\lib\site-packages\pip\index.py", line 465, in 
    find_requirement
    all_candidates = self.find_all_candidates(req.name)
File "D:\Anaconda3\lib\site-packages\pip\index.py", line 423, in 
    find_all_candidates
    for page in self._get_pages(url_locations, project_name):
File "D:\Anaconda3\lib\site-packages\pip\index.py", line 568, in _get_pages
    page = self._get_page(location)
File "D:\Anaconda3\lib\site-packages\pip\index.py", line 683, in _get_page
    return htmlPage.get_page(link, session=self.session)
File "D:\Anaconda3\lib\site-packages\pip\index.py", line 792, in get_page
    "Cache-Control": "max-age=600",
File "D:\Anaconda3\lib\site-packages\pip\_vendor\requests\sessions.py", line 
     488, in get
     return self.request('GET', url, **kwargs)
File "D:\Anaconda3\lib\site-packages\pip\download.py", line 386, in request
     return super(PipSession, self).request(method, url, *args, **kwargs)
File "D:\Anaconda3\lib\site-packages\pip\_vendor\requests\sessions.py", line 
     475, in request
     resp = self.send(prep, **send_kwargs)
File "D:\Anaconda3\lib\site-packages\pip\_vendor\requests\sessions.py", line 
     596, in send
     r = adapter.send(request, **kwargs)
File "D:\Anaconda3\lib\site-packages\pip\_vendor\cachecontrol\adapter.py", 
     line 47, in send
     resp = super(CacheControlAdapter, self).send(request, **kw)
     File "D:\Anaconda3\lib\site-packages\pip\_vendor\requests\adapters.py", 
     line 423, in send
     timeout=timeout
 File "D:\Anaconda3\lib\site-
     packages\pip\_vendor\requests\packages\urllib3\connectionpool.py", line 
     589, in urlopen
     self._prepare_proxy(conn)
 File "D:\Anaconda3\lib\site-
     packages\pip\_vendor\requests\packages\urllib3\connectionpool.py", line 
     797, in _prepare_proxy
     conn.connect()
 File "D:\Anaconda3\lib\site-
     packages\pip\_vendor\requests\packages\urllib3\connection.py", line 
     254, in connect
     conn = self._new_conn()
 File "D:\Anaconda3\lib\site-
      packages\pip\_vendor\requests\packages\urllib3\connection.py", line 
      142, in _new_conn
     (self.host, self.port), self.timeout, **extra_kw)
 File "D:\Anaconda3\lib\site-
      packages\pip\_vendor\requests\packages\urllib3\util\connection.py", 
      line 66, in create_connection
 if host.startswith('['):
       AttributeError: 'NoneType' object has no attribute 'startswith'

如果您能看到图片，我将不胜感激：

【问题讨论】：

将错误堆栈添加为格式化文本

那张图片很糟糕，请提供一个更好的

抱歉，我已经更新了。

这是代理设置问题。请检查 $HTTP_PROXY 和 $HTTPS_PROXY 环境变量。

@danger89 是的，我认为你是对的！

【参考方案1】：

您是否按照 Anaconda 通过 pip 安装 tensorflow 所需的步骤进行操作。好像只是pip install tensorflow：

https://www.tensorflow.org/versions/r0.12/get_started/os_setup#anaconda_installation

【讨论】：

不，不只是tensorflow，我就是不能在网上pip，而且报错都是一样的。

那么你的 pip 坏了，试试 --upgrade of pip，重新安装 pip 和 python 等。

那么您很可能面临此处描述的问题：github.com/pypa/pip/issues/3440#issuecomment-177458060

【参考方案2】：

对于它可能关心的人，有这个重复的帖子，OP 评论了这个问题的解决方案： Resolved duplicate

看起来，您的 python 路径“D:\Anaconda3”可能与使用 pip install 时出错有关。尝试在“C:\”上安装python。

【参考方案3】：

pip 也有同样的问题。结果是我的代理的 url 格式不正确，我错误地只使用了一个正斜杠：

http:/myproxy...

将上述内容更正为有效的网址后，一切正常。