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they work side by side, you can just call "python27" vs "python34" and the same happens for related tools (pip, pep8 etc).

The un-suffixed version ("python") refers to a default that can be switched with a single command affecting all related tools. It's great.

This is not python specific either, it also works with perl, ruby, etc

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now this is a pointless feature.

time to get familiar with https://github.com/yyuu/pyenv

The fact that there is a super-specialized tool to do this demonstrates that it's not a pointless feature. It's much nicer to be able to use macports to install all the versions of python that I need instead of using brew to install pyenv and then pyenv to install python (and then pip to install python packages...)

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