無論使用代理或不使用代理，pip3 install [package] 都會失敗

Question

環境

Windows 1903 WSL（kali）python3.7

描述

像這樣使用pip3 install flask輸出顯示時

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中沒有設定環境變數。