pip命令无法安装包的可能原因，未升级至最新！

pip安装包时报错

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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(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:1056)'))) - skipping

解决方案

升级pip至最新版本！！！！！
python3 -m pip install --upgrade pip
升级之后运行pip3 install httprunner成功安装！！！坑啊