command 'python3' from deb python3 command 'python' from deb python-is-python3 code example

Example 1: update link python is python 3

$ python --version
Python 2.7.6
$ python3 --version
Python 3.4.3
$ alias python=python3
$ python --version
Python 3.4.3

Example 2: update link python is python 3

$ command python --version
Python 2.7.6