[BUG]: Could not install packages due to an OSError: HTTPSConnectionPool

[Feyn-zjw]

ERROR: Could not install packages due to an OSError: HTTPSConnectionPool(host='github.com', port=443): Max retries exceeded with url: /vBaiCai/python-pesq/archive/master.zip (Caused by NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7efffe815c10>: Failed to establish a new connection: [Errno 101] Network is unreachable'))

[anurag2506]

sudo pip install --trusted-host=pypi.python.org --trusted-host=pypi.org --trusted-host=files.pythonhosted.org --upgrade --proxy=127.0.0.1:3128 jupyterthemes

This is the command that I found on stack overflow for mac systems