我是一所高中的老师,我们用python编写代码。我正在尝试安装一些软件包,如pip和mysql.connector,但是防火墙阻止了我使用pip.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 SS