Could not fetch URL https://pypi.python.org/simple/xxx/: There was a problem confirming the ssl certificate: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:749) - skipping
?Could not find a version that satisfies the requirement xxx (from versions: )
No matching distribution found for xxx
resolve:
pip --trusted-host pypi.python.org install xxx
pip install 报错 Could not fetch URL
原文地址：https://www.cnblogs.com/ouyangping/p/8481446.html