pip3 install [package] 无论使用代理还是不使用代理都失败

Question

环境

Windows 1903 WSL（kali）python3.7

描述

当使用pip3 install flask这样的输出显示时

WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyE
rror('Cannot connect to proxy.', NewConnectionError('<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x7f7
d8da46ad0>: Failed to establish a new connection: [Errno 111] Connection refused'))': /simple/flask/

加法

wsl 中没有设置环境变量。