How would one install a side by side installation of Python 2.x, and Python 3.x

I think the title says it all.

2 Answers

Python 3 is available from the repositories and can be installed side by side with Python 2:

sudo apt-get install python3 python 

You can use the -V switch to find out the minor version numbers:

$ python3 -V Python 3.1.2 $ python -V python 2.6.6 

comment: please note that python 2 and 3 will use different output channels for their prints whilst the returned code will be zero in case of success.

command=python2 --version rc=0 stderr=Python 2.7.12 

.

command=python3 --version rc=0 stdout=Python 3.5.2