错误：There was a problem confirming the ssl certificate: [SSL: CERTIFICATE_VERIFY_FAILED] certificate
错误：There was a problem confirming the ssl certificate: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed(_ssl.c:748) - skipping
解决方案：添加–trusted-host
pip install 要安装的依赖包名 -i http://pypi.tuna.tsinghua.edu.cn/simple/ --trusted-host pypi.tuna.tsinghua.edu.cn
在系统目录C:\Users\用户\AppData\Roaming新建pip文件夹，在pip文件夹下新建pip.ini文件，并写入如下配置：
[global]
index-url = http://mirrors.aliyun.com/pypi/simple/
[install]
trusted-host = mirrors.aliyun.com
即可不用添加–trusted-host