Multiple Python Version on the same computer

In the place that I work we have some legacy servers with really old packages installed. I did a Python script using version 2.7.5 and when I finished my development I figured out that the server was using version 2.4 (what was launch in 2004!). So… To test it before move to production, I needed install this old version. To do that I just:

To install it (per the instructions in the link above), you do the following:

[email protected] ~ $ sudo add-apt-repository ppa:fkrull/deadsnakes

Then you need to update your cache:

[email protected] ~ $ sudo apt-get update

Finally, simply install the other versions (I'm running on ubuntu 12.04 LTS, so I have python 2.7 already):

[email protected] ~ $ sudo apt-get install python2.4 python2.5 python2.6

(Check details on: http://bhfsteve.blogspot.com.br/2012/05/run-multiple-python-versions-on-your.html)

After install it I removed the repository:

sudo add-apt-repository ppa:fkrull/deadsnakes --remove

To execute the old version just type:
python2.4

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