There was a problem confirming the ssl certificate

最近项目上用到Bata函数用到scipy包

ModuleNotFoundError: No module named ‘scipy’ 执行 pip install scipy报错：

There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='pypi.tuna.tsinghua.edu.cn', port=443): Max retries exceeded with url: /simple/pip/ (Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate

经查询执行pip install scipy -i http://pypi.douban.com/simple --trusted-host pypi.douban.com 还是报错 猜想可能是Python源的问题

修改为：pip install scipy -i http://mirrors.aliyun.com/pypi/simple --trusted-host mirrors.aliyun.com 问题解决

说明：这是阿里源 --trusted-host mirrors.aliyun.com 这是为了获得ssl证书的认证

pip和pip3的区别

1. 安装了python3之后，会有pip3

2. 当一台电脑同时有多个版本的Python的时候，用pip3就可以自动区分用Python3来安装库。避免和Python2发生冲突

3. 如果只安装了Python3，用pip还是pip3都一样的