Environment
Windows 1903 WSL (kali) python3.7
Description
when using pip3 install flask the output display like such
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/
Addtion
there is not setting environment variables in wsl.
