Python : Change default 2.x version to 3.x in Linux

python : Change default 2.x version to 3.x in Linux

To open python 3x
python3

To install packages
pip3 install <package>




To change default

$python --verion
Python 2.4

# update-alternatives --install /usr/bin/python python /usr/bin/python2.7 1
update-alternatives: using /usr/bin/python2.7 to provide /usr/bin/python (python) in auto mode

 # update-alternatives --install /usr/bin/python python /usr/bin/python3.4 2
update-alternatives: using /usr/bin/python3.4 to provide /usr/bin/python (python) in auto mode

$python --verion
Python3.6

#select versions

update-alternatives --config python