I just installed qgis (and all the dependencies, etc.) on my Mac OSX 10.10 via homebrew. Currently, I use both Python 2 and Python 3 on the machine. Whenever I change the Python path [to open qgis], I can no longer use Python 3 in any of my py3 virtual environments until I unset the python path.

Has anyone found a good solution to having both Python2 + Python3 on their machine with qgis?

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    It is a simple problem of UNIX path. I have two versions of Python 2.7.x and a version of Python 3.5 which can run at the same time – gene Oct 21 '15 at 19:08
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    How do you change the python path? I.e. make sure that you are not changing the path system-wide but only for the QGIS application. – Matthias Kuhn Oct 22 '15 at 7:36
  • It turned out to be that, Matthias Kuhn. Thank you! – james Oct 23 '15 at 15:20