pip install xxx 报错，内容如下：

WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLEOFError(8, 'EOF occurred in violation of protocol (_ssl.c:1124)'))': /simple/jinja2/
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLEOFError(8, 'EOF occurred in violation of protocol (_ssl.c:1124)'))': /simple/jinja2/
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLEOFError(8, 'EOF occurred in violation of protocol (_ssl.c:1124)'))': /simple/jinja2/
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLEOFError(8, 'EOF occurred in violation of protocol (_ssl.c:1124)'))': /simple/jinja2/
WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLEOFError(8, 'EOF occurred in violation of protocol (_ssl.c:1124)'))': /simple/jinja2/
Could not fetch URL https://pypi.tuna.tsinghua.edu.cn/simple/jinja2/: There was a problem confirming the ssl certificate
: HTTPSConnectionPool(host='pypi.tuna.tsinghua.edu.cn', port=443): Max retries exceeded with url: /simple/jinja2/ 
(Caused by SSLError(SSLEOFError(8, 'EOF occurred in violation of protocol (_ssl.c:1124)'))) - skipping

环境：

win 11 64bit

python 3.8.6

我的报错原因是：

直接原因：系统挂有代理导致

根本原因：不太清楚。

解决方法（以下任一即可）

方法一：

关掉系统代理（PAC 也不可，需要  清除（关掉）系统代理

方法二：

在使用 pip 的终端设置正确的 https 代理

临时设置命令为: set https_proxy=http://127.0.0.1:port(自己的本地代理端口号)

长期设置 or 终端启动 自动设置代理请自行 google 或者 bing