ERROR: Could not install packages due to an EnvironmentError: HTTPSConnectionPool(host='files.pythonhosted.org'
sudo pip install --trusted-host=pypi.python.org --trusted-host=pypi.org --trusted-host=files.pythonhosted.org --upgrade --proxy=127.0.0.1:3128 jupyterthemesCopyright © 2021 Codeinu
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