在Windows上使用pip安裝virtualenv時出錯

Question

嘗試在Windows計算機上使用pip安裝virtualenv，但遇到以下錯誤

pip install virtualenv
    Collecting virtualenv
    Exception:
    Traceback (most recent call last): File "c:\python27\lib\site-packages\pip\basecommand.py", line 215, in main status = self.run(options, args)
    File "c:\python27\lib\site-packages\pip\commands\install.py", line 324, in run
    requirement_set.prepare_files(finder)
    File "c:\python27\lib\site-packages\pip\req\req_set.py", line 380, in prepare_files ignore_dependencies=self.ignore_dependencies))
    File "c:\python27\lib\site-packages\pip\req\req_set.py", line 620, in _prepare_file session=self.session, hashes=hashes)
    File "c:\python27\lib\site-packages\pip\download.py", line 821, in unpack_url hashes=hashes
    File "c:\python27\lib\site-packages\pip\download.py", line 659, in unpack_http_url hashes)
    File "c:\python27\lib\site-packages\pip\download.py", line 853, in _download_http_url stream=True,
    File "c:\python27\lib\site-packages\pip\_vendor\requests\sessions.py", line 488, in get return self.request('GET', url, **kwargs)
    File "c:\python27\lib\site-packages\pip\download.py", line 386, in request return super(PipSession, self).request(method, url, *args, **kwargs)
    File "c:\python27\lib\site-packages\pip\_vendor\requests\sessions.py", line 475, in request resp = self.send(prep, **send_kwargs)
    File "c:\python27\lib\site-packages\pip\_vendor\requests\sessions.py", line 596, in send r = adapter.send(request, **kwargs)
    File "c:\python27\lib\site-packages\pip\_vendor\cachecontrol\adapter.py", line 47, in send resp = super(CacheControlAdapter, self).send(request, **kw)
    File "c:\python27\lib\site-packages\pip\_vendor\requests\adapters.py", line 497, in send raise SSLError(e, request=request)
    SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:661)
    You are using pip version 9.0.1, however version 10.0.1 is available.
    You should consider upgrading via the 'python -m pip install --upgrade pip' command.

Answer 1

您是否嘗試過使用cmd line作為管理員在下面運行，

pip install virtualenv

virtualenv附帶了一個pip副本，該副本被復制到您創建的每個新環境中，因此，virtualenv就是所需要的全部。 您可以嘗試將virtualenv作為獨立軟件包單獨安裝。 對於Windows用戶而言，這實際上更容易。 有關說明，請參見https://virtualenv.pypa.io/en/stable/ 。

Answer 2

您需要先升級畫中畫

python -m pip install --upgrade pip

然后您可以通過Administrator Acces安裝軟件包

pip install virtualenv

Answer 3

問題解決了！ Python 2.7.13隨附的pip出現問題，保存了該文件（ https://bootstrap.pypa.io/get-pip.py ），然后命令'python get-pip.py'通過以下方式解決了該問題：升級它。 由於命令'python -m pip install --upgrade pip'本身給出了與上述相同的錯誤。 謝謝大家！