pip install 失败 “connection error: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed

问题描述:

使用pip按照splinter等三方库时报错，如下：

pip install splinter
Collecting splinter
  Could not fetch URL https://pypi.python.org/simple/splinter/: There was a problem confirming the ssl certificate: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:777) - skipping
  Could not find a version that satisfies the requirement splinter (from versions: )
No matching distribution found for splinter

网友们的解决方法：

使用--trusted-host命令行选项

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

然而！！！我在使用了上述命令之后发现依然报同样的错：

pip --trusted-host pypi.python.org
  install splinter
Collecting splinter
  Could not fetch URL https://pypi.python.org/simple/splinter/: There was a problem confirming the ssl certificate: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:777) - skipping
  Could not find a version that satisfies the requirement splinter (from versions: )
No matching distribution found for splinter

后来经查找资料，发现关闭掉fiddler之后，再输入上述命令就成功了！

外国网友的原话：   

Check if you have fiddler opened and close it. Fiddler try break SSL and this breaks pip, when I close fiddler pip works for me. When I close my fiddler everything goes ok