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Is there a particular reason on why update-alternatives is not working with Python since ubuntu comes bundled with different versions?

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up vote 10 down vote accepted

The reason is, python versions aren't fully compatibile. If you set 3.3 version as your default, the applications made for 2.7 could not work.

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Exactly. Python 2 and 3 aren't considered alternatives. They're completely different things. –  Oli Apr 22 at 10:28
@Oli Great... except that python 2.x automatically symlinks itself to /usr/bin/python, which IMO is the wrong behavior since they aren't alternatives. –  Powerlord May 27 at 18:29
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