带有SSL证书的pip安装失败，验证失败(_ssl.c:833)

问题描述：

我无法通过pip install安装任何外部python模块. 我已经正确安装了python，但是如果我使用pip_install，它将显示此错误.

I am not able to install any external python module through pip install. I have installed python correctly but if I use pip_install it shows me this error.

这是我运行pip install pytesseract

 C:\Users\190560>pip install pytesseract
Collecting pytesseract
  Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:833)'),)': /simple/pytesseract/
  Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:833)'),)': /simple/pytesseract/
  Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:833)'),)': /simple/pytesseract/
  Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:833)'),)': /simple/pytesseract/
  Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:833)'),)': /simple/pytesseract/
  Could not fetch URL https://pypi.org/simple/pytesseract/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='pypi.org', port=443): Max retries exceeded with url: /simple/pytesseract/ (Caused by SSLError(SSLError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:833)'),)) - skipping
  Could not find a version that satisfies the requirement pytesseract (from versions: )
No matching distribution found for pytesseract
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(SSLError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:833)'),)) - skipping

我该如何解决这个问题?

How do I solve this problem??

我可以使用此命令部分解决问题

I can partially solve the problem by using this command

pip install --trusted-host pypi.org --trusted-host files.pythonhosted.org <package_name>

但是我无法在计算机上找到任何由pip.ini提示的pip.ini文件夹此处的问题

but I cannot find any pip.ini folder on my computer as suggested by this question here

有任何永久解决此问题的建议吗?

Any suggestions to fix this problem permanently??

答

当我在公司网络中需要外部服务器访问代理时，我遇到了类似的问题.在这种情况下，我们必须告诉pip代理:

I have experienced similar issues when I am in a corporate network where a proxy is required for external network access. In this case, we'll have to tell pip the proxy:

pip --proxy=http://your.corporate.proxy.com  install pytesseract

另一个可能的原因是由于pypi域更改.在这种情况下，您可以尝试以下解决方案:

Another possible cause is due to the pypi domain change. In this case, you can try the solution as below:

pip --index-url=http://pypi.python.org/simple/ --trusted-host pypi.python.org install pytesseract

另一个类似的案例，给出了很好的答案: pip总是无法通过ssl验证

Another similar case with an excellent answer: pip always fails ssl verification

带有SSL证书的pip安装失败，验证失败(_ssl.c:833)

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