在conda环境中使用pip时出现SSL证书问题

Question

OC：MS Windows 10专业版

康达：4.7.11

点：19.2.2

的Python：3.7.4

CUDA：10.1.168

需要在隔离的conda环境中安装pycuda。 我创建了新的环境，如conda docs中所述：

conda create -n cudaenv
conda install -n cudaenv cudatoolkit

然后安装点子：

conda install -n cudaenv pip
conda activate cudaenv

并尝试在其中安装pycuda：

pip install pycuda-2019.1.2+cuda101-cp37-cp37m-win_amd64.whl

...然后发生错误

(cudaenv) D:\Downloads>**pip install pycuda-2019.1.2+cuda101-cp37-cp37m-win_amd64.whl**f
WARNING: pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available.
Processing d:\downloads\pycuda-2019.1.2+cuda101-cp37-cp37m-win_amd64.whl
Collecting appdirs>=1.4.0 (from pycuda==2019.1.2+cuda101)
  WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/appdirs/
  WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/appdirs/
  WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/appdirs/
  WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/appdirs/
  WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/appdirs/
  Could not fetch URL https://pypi.org/simple/appdirs/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='pypi.org', port=443): Max retries exceeded with url: /simple/appdirs/ (Caused by SSLError("Can't connect to HTTPS URL because the SSL module is not available.")) - skipping
  ERROR: Could not find a version that satisfies the requirement appdirs>=1.4.0 (from pycuda==2019.1.2+cuda101) (from versions: none)
ERROR: No matching distribution found for appdirs>=1.4.0 (from pycuda==2019.1.2+cuda101)
WARNING: pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available.
Could not fetch URL https://pypi.org/simple/pip/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='pypi.org', port=443): Max retries exceeded with url: /simple/pip/ (Caused by SSLError("Can't connect to HTTPS URL because the SSL module is not available.")) - skipping

因此，尽管我试图从转轮安装pycuda，但我还是遇到SSL错误。 更多的是，标志--trusted-host pypi.python.org --trusted-host files.pythonhosted.org --trusted-host pypi.org没有帮助，我也遇到了同样的错误。

在基本环境中，pip正常工作。 有人可以说，这是什么意思？

upd：看起来它试图从远程仓库中获取appdirs，但是由于ssl问题而失败--trusted-host仍然无济于事。 点子的版本是最新的。