I just recently installed pip (3.6) by building it with python3.6 on my Ubuntu 16.04 LTS system.
wget https://bootstrap.pypa.io/get-pip.py
python3.6 get-pip.py
This completed successfully but changed the pip3 binary under /usr/local/bin/pip3 to correspond to /usr/local/lib/python3.6/dist-packages/pip (python 3.6) instead of /usr/local/lib/python3.5/dist-packages/pip (python 3.5)
I have tried,
sudo update-alternatives --install /usr/local/bin/pip3 pip3 /usr/local/lib/python3.5/dist-packages/pip 1
to make sudo update-alternatives --config pip3 work and finally point to python3.5 dist-packages.
The error that i am getting,
update-alternatives: warning: forcing reinstallation of alternative /usr/local/lib/python3.5/dist-packages/pip because link group pip3 is broken
update-alternatives: warning: not replacing /usr/local/bin/pip3 with a link
Please advice, Thanks.
Pointing pip3 to python3.5 instead of python3.6
python3.5 $(which pip3) install <your-package-name>