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How to use proxy setting with pip to install packages?

If you see error messages like below when you try to install packages in a restricted environment where it is mandated to use proxy settings to download packages -

"Retrying (Retry(total=4, connect=None, read=None, redirect=None)) after connection broken by 'ConnectTimeoutError(, 'Connection to pypi.python.org timed out. (connect timeout=15)')': /simple/wxpython/ "


we need to supply proxy server setting to pip while installing the python packages , Example


sudo pip install --proxy=https://proxy.example.com:port -U wxPython


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