remove all the python in ubuntu

sudo apt purge python-pip python-dev
 sudo rm -rf /usr/bin/python*
 sudo rm -rf /etc/python*
 sudo rm -rf /usr/local/lib/python*
 sudo rm -rf /usr/share/man/man1/python*
 sudo rm -rf /usr/share/python*
 sudo rm -rf /usr/local/bin/pip*