In command prompt, input below:
set http_proxy=http://account:Password@proxyServerIP:port
set https_proxy=http://account:Password@proxyServerIP:port
check the information you put:
set http
Then go to python interpreter folder, download package:
python -m pip install packageName --trusted-host pypi.python.org --trusted-host pypi.org --trusted-host files.pythonhosted.org --target=c:/tibco/python/lib