If I type the command which python, then I get:

Oliviers-iMac:~$ which -a python

If I then type python --version, how do I know which Python install I'm getting the version of? Are the two locations above 2 different Python installs?

  • 1
    which python i.e. without the -a tells you which one will be used
    – mmmmmm
    Mar 28 '14 at 15:23
  • I suppose which one gets executed depends on the order in $PATH, right? Mar 28 '14 at 15:56
  • 1
    @Oliver yes correct
    – mmmmmm
    Mar 28 '14 at 18:12

/System/Library/Frameworks/Python.framework/Versions/2.7/bin/python is most likely a symlink.

readlink on a simlink will give you the target.

For example on my Mavericks installation I have following :

$readlink /System/Library/Frameworks/Python.framework/Versions/2.7/bin/python
$readlink /System/Library/Frameworks/Python.framework/Versions/2.7/bin/python2

Which means when I run python it actually runs /System/Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7

Also there is something funny, when running /System/Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7

Try this

>>> import sys
>>> print sys.executable 

Which will return this :

  • Strange! I wonder why intermediary simlinks are required? Maybe it's because python 2.7 extends python 2 which extends python? Mar 28 '14 at 14:59
  • By the way, when you say that /System/Library/Frameworks/Python.framework/Versions/2.7/bin/python is most likely a simlink, do you mean that it points to /usr/bin/python? DO simlinks always point to binaries in /usr/bin? (Sorry for the noob questions!) Mar 28 '14 at 15:07
  • symlink can point to anything anywere. File, directory, binary. There (a bit) like aliases. Mar 28 '14 at 15:14

If you are coding in python, you may wanna:

import sys

The path would probably show you which version of python you are using.

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .