使用pip安裝任何模塊時出錯，但easy_install有效

Question

每當我嘗試使用pip安裝任何模塊時，我都會收到此錯誤，但easy_install工作正常。 我的Ubuntu 12.04機器中沒有配置代理。 以前它工作正常，只是知道，它是如何突然停止工作的。

這是我得到的錯誤，在運行sudo pip install <any_package_name> ：

Exception:
Traceback (most recent call last):
  File "/tmp/tmpOA61D3/pip.zip/pip/basecommand.py", line 246, in main
    status = self.run(options, args)
  File "/tmp/tmpOA61D3/pip.zip/pip/commands/install.py", line 342, in run
    requirement_set.prepare_files(finder)
  File "/tmp/tmpOA61D3/pip.zip/pip/req/req_set.py", line 345, in prepare_files
    functools.partial(self._prepare_file, finder))
  File "/tmp/tmpOA61D3/pip.zip/pip/req/req_set.py", line 290, in _walk_req_to_install
    more_reqs = handler(req_to_install)
  File "/tmp/tmpOA61D3/pip.zip/pip/req/req_set.py", line 415, in _prepare_file
    req_to_install, finder)
  File "/tmp/tmpOA61D3/pip.zip/pip/req/req_set.py", line 376, in _check_skip_installed
    finder.find_requirement(req_to_install, self.upgrade)
  File "/tmp/tmpOA61D3/pip.zip/pip/index.py", line 425, in find_requirement
    all_versions = self._find_all_versions(req.name)
  File "/tmp/tmpOA61D3/pip.zip/pip/index.py", line 349, in _find_all_versions
    index_locations = self._get_index_urls_locations(project_name)
  File "/tmp/tmpOA61D3/pip.zip/pip/index.py", line 323, in _get_index_urls_locations
    page = self._get_page(main_index_url)
  File "/tmp/tmpOA61D3/pip.zip/pip/index.py", line 789, in _get_page
    return HTMLPage.get_page(link, session=self.session)
  File "/tmp/tmpOA61D3/pip.zip/pip/index.py", line 878, in get_page
    "Cache-Control": "max-age=600",
  File "/tmp/tmpOA61D3/pip.zip/pip/_vendor/requests/sessions.py", line 476, in get
    return self.request('GET', url, **kwargs)
  File "/tmp/tmpOA61D3/pip.zip/pip/download.py", line 367, in request
    return super(PipSession, self).request(method, url, *args, **kwargs)
  File "/tmp/tmpOA61D3/pip.zip/pip/_vendor/requests/sessions.py", line 464, in request
    resp = self.send(prep, **send_kwargs)
  File "/tmp/tmpOA61D3/pip.zip/pip/_vendor/requests/sessions.py", line 576, in send
    r = adapter.send(request, **kwargs)
  File "/tmp/tmpOA61D3/pip.zip/pip/_vendor/cachecontrol/adapter.py", line 46, in send
    resp = super(CacheControlAdapter, self).send(request, **kw)
  File "/tmp/tmpOA61D3/pip.zip/pip/_vendor/requests/adapters.py", line 370, in send
    timeout=timeout
  File "/tmp/tmpOA61D3/pip.zip/pip/_vendor/requests/packages/urllib3/connectionpool.py", line 544, in urlopen
    body=body, headers=headers)
  File "/tmp/tmpOA61D3/pip.zip/pip/_vendor/requests/packages/urllib3/connectionpool.py", line 341, in _make_request
    self._validate_conn(conn)
  File "/tmp/tmpOA61D3/pip.zip/pip/_vendor/requests/packages/urllib3/connectionpool.py", line 762, in _validate_conn
    conn.connect()
  File "/tmp/tmpOA61D3/pip.zip/pip/_vendor/requests/packages/urllib3/connection.py", line 238, in connect
    ssl_version=resolved_ssl_version)
  File "/tmp/tmpOA61D3/pip.zip/pip/_vendor/requests/packages/urllib3/contrib/pyopenssl.py", line 296, in ssl_wrap_socket
    cnx.set_tlsext_host_name(server_hostname)
AttributeError: '_socketobject' object has no attribute 'set_tlsext_host_name'

Answer 1

我發現了一個潛在的解決方案在這里 。 這是相關的引用：

“發生這種情況是因為Ubuntu 12.04（這是我服務器的操作系統）有舊的pyOpenSSL庫，它不接受屬性'set_tlsext_host_name'。為了解決這個問題，你需要添加依賴pyOpenSSL > = 0.13。在Ubuntu上更新pyOpenSSL使用pip ，你還需要安裝libffi-dev並通過apt刪除python-openssl 。“

$ sudo apt-get purge python-openssl
$ sudo apt-get install libffi-dev
$ sudo pip install pyOpenSSL

如果不清楚或者它對你不起作用，請告訴我。