Proxy Authentication Error in pip install Mac
Variables in bash are case sensitive and most software expects the proxy to be set in uppercase. It's also a good idea to quote strings as you never know what can upset bash.

export HTTP_PROXY="http://UserID:PWD@202.141.80.24:3128"

export HTTPS_PROXY="http://UserID:PWD@202.141.80.24:3128"

export FTP_PROXY="http://UserID:PWD@202.141.80.24:3128"


NOTE For these sort of shell questions Stack Overflow is usually better for a quick answer.