How would one install a side by side installation of Python 2.x, and Python 3.x
Solution 1:
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