Christopher Brewster wrote:
I appear to have 4 different installations of Python on my reformatted Snow
Leopard installation.
actually, 3 -- see below.
Versions of Python:
1. came with SL
I assume it is here:
/usr/bin/python
yup -- but see below
2. From Python.org
I assume it is the one here:
/usr/local/bin/python
yup, but same note.
3. From Macports
I know it is the one here:
/opt/local/bin/python
yup.
4. I do not know where this came from:
/Library/Frameworks/Python.framework/Versions/2.6/bin/python
That is the actual installation location for the python.org python.
/usr/local/bin/python is a link to it.
In fact, Apple's python lives in
/System//Library/Frameworks/Python.framework
Clearly when I install something with macports, it is accessible only if I run
the macports version of python.
correct.
However, I have installed 'pip' and this seems to be installing
packages so that they only work with the original python (in
/usr/bin/python).
I haven't used pip, but the key is to run it with the python you want to
use, which may mean making sure you install it into the python you want
to use.
Question: How do I get 'pip' to install correctly so as to be
accessible with the current default python which appears to be the one
installed from python.org?
from the pip docs: "pip does not have to be installed to use it, you can
run python path/to/pip.py and it will work"
so that should do it. If you want to be extra careful, use
/usr/local/bin/python
If I want to use the Macport python, how do I set this to be the
default, or do I always have to call it via opt/local/bin/python?
That is determined by your PATH setting. Mine is set in ~/.bash_profile.
It could be in a couple of other places (sigh).
macports put this line in mine:
export PATH=/opt/local/bin:/opt/local/sbin:$PATH
That puts the macports stuff in front of everything else in your system,
so it will be found first.
(unless there is another PATH setting after that).
type:
$ echo $PATH
to see what you've got now.
you can also do:
$ which python
to see what python (or any other command) it's finding.
HTH,
-Chris
--
Christopher Barker, Ph.D.
Oceanographer
Emergency Response Division
NOAA/NOS/OR&R (206) 526-6959 voice
7600 Sand Point Way NE (206) 526-6329 fax
Seattle, WA 98115 (206) 526-6317 main reception
chris.bar...@noaa.gov
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