Question

我在linux上安装了pip，pip list命令正常工作。但是当使用pip install命令时，它会收到以下错误：

Traceback (most recent call last):
  File "/usr/local/lib/python2.7/site-packages/pip-6.0.7-py2.7.egg/pip/basecommand.py", line 232, in main
    status = self.run(options, args)
  File "/usr/local/lib/python2.7/site-packages/pip-6.0.7-py2.7.egg/pip/commands/install.py", line 339, in run
    requirement_set.prepare_files(finder)
  File "/usr/local/lib/python2.7/site-packages/pip-6.0.7-py2.7.egg/pip/req/req_set.py", line 333, in prepare_files
    upgrade=self.upgrade,
  File "/usr/local/lib/python2.7/site-packages/pip-6.0.7-py2.7.egg/pip/index.py", line 305, in find_requirement
    page = self._get_page(main_index_url, req)
  File "/usr/local/lib/python2.7/site-packages/pip-6.0.7-py2.7.egg/pip/index.py", line 783, in _get_page
    return HTMLPage.get_page(link, req, session=self.session)
  File "/usr/local/lib/python2.7/site-packages/pip-6.0.7-py2.7.egg/pip/index.py", line 872, in get_page
    "Cache-Control": "max-age=600",
  File "/usr/local/lib/python2.7/site-packages/pip-6.0.7-py2.7.egg/pip/_vendor/requests/sessions.py", line 473, in get
    return self.request('GET', url, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/pip-6.0.7-py2.7.egg/pip/download.py", line 365, in request
    return super(PipSession, self).request(method, url, *args, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/pip-6.0.7-py2.7.egg/pip/_vendor/requests/sessions.py", line 461, in request
    resp = self.send(prep, **send_kwargs)
  File "/usr/local/lib/python2.7/site-packages/pip-6.0.7-py2.7.egg/pip/_vendor/requests/sessions.py", line 573, in send
    r = adapter.send(request, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/pip-6.0.7-py2.7.egg/pip/_vendor/cachecontrol/adapter.py", line 43, in send
    resp = super(CacheControlAdapter, self).send(request, **kw)
  File "/usr/local/lib/python2.7/site-packages/pip-6.0.7-py2.7.egg/pip/_vendor/requests/adapters.py", line 370, in send
    timeout=timeout
  File "/usr/local/lib/python2.7/site-packages/pip-6.0.7-py2.7.egg/pip/_vendor/requests/packages/urllib3/connectionpool.py", line 518, in urlopen
    body=body, headers=headers)
  File "/usr/local/lib/python2.7/site-packages/pip-6.0.7-py2.7.egg/pip/_vendor/requests/packages/urllib3/connectionpool.py", line 322, in _make_request
    self._validate_conn(conn)
  File "/usr/local/lib/python2.7/site-packages/pip-6.0.7-py2.7.egg/pip/_vendor/requests/packages/urllib3/connectionpool.py", line 727, in _validate_conn
    conn.connect()
  File "/usr/local/lib/python2.7/site-packages/pip-6.0.7-py2.7.egg/pip/_vendor/requests/packages/urllib3/connection.py", line 238, in connect
    ssl_version=resolved_ssl_version)
  File "/usr/local/lib/python2.7/site-packages/pip-6.0.7-py2.7.egg/pip/_vendor/requests/packages/urllib3/util/ssl_.py", line 254, in ssl_wrap_socket
    return context.wrap_socket(sock)
  File "/usr/local/lib/python2.7/ssl.py", line 350, in wrap_socket
    _context=self)
  File "/usr/local/lib/python2.7/ssl.py", line 537, in __init__
    raise ValueError("check_hostname requires server_hostname")
ValueError: check_hostname requires server_hostname

我该如何解决这个问题？

Answer 1

pip 6.1.0已经发布，解决了这个问题。您可以使用以下方式升级：

pip --trusted-host pypi.python.org install -U pip

自我升级。

原始答案：

这是由Python 2.7.9的变化引起的，urllib3需要考虑这一变化。有关该项目，请参阅issue #543。您的OpenSSL库不支持SNI，这意味着urllib3不会将主机名传递给SSL套接字包装器，但是Python 2.7.9期望主机名无论如何都会被传递用于不同的目的。

urllib3由requests间接使用（请参阅requests issue 2435），pip正在使用<{1}}。

我打开了ticket to track this from pip's perspective。

项目维护人员已经修复了基础问题，等待新版本。如果您不耐烦，可以安装pip的当前开发版本：

pip install --trusted-host=github.com -U https://github.com/pypa/pip/archive/develop.zip

这将安装pip-6.1.0.dev0，当6.1.0完全发布时，您可以使用pip install -U pip再次升级以从PyPI获得最终版本。

Answer 2

我遇到同样的问题，发现在我的情况下可以避免（pip 6.0.8）如下

pip --trusted-host pypi.python.org install <thing>

Answer 3

与urllib3有关。您可以使用 urllib3 版本 1.25.8 解决它。手动下载该版本的 urllib3 并安装。

即使你安装了 thia 版本，pip 仍然会使用它自己的版本。所以你必须删除它并替换它。

通常，安装的模块在 PythonXX/Lib/site-packages 上

删除PythonXX/Lib/site-packages/pip/_vendor中的urllib3
将“PythonXX/Lib/site-packages/urllib3”移动到“PythonXX/Lib/site-packages/pip/_vendor”。

Python pip install需要server_hostname

3 个答案: