I think that what you are looking for is here:

http://packages.python.org/distribute/easy_install.html#multiple-python-versions

When using virtualenv itself, you can specify which python you wish to use
to create the environment:

http://stackoverflow.com/questions/1534210/use-different-python-version-with-virtualenv

Hope this helps,
Ben

On 29 February 2012 07:47, Edward <[email protected]> wrote:

> Hello all,
>
> I have been using Python for a few weeks. I've done some development
> with Google App Engine.
> But this is my first time to work on any Python framework besides GAE.
>
> Currently I am having problem setting up pyramid.
>
> My environment is I have Mac OS.
> I have CentOS 5.7 running on Virtual Box.
> I have installed Python2.7 and Python 3.2 under /opt/python27 and /opt/
> python3 respectively.
> If I run #python -> it starts up python 2.4 which is installed by
> default.
> If I run #python2.7, it starts up python 2.7
> I can run #python3 to use python3.2 interpreter.
> I build python2.7 and Python3.2 from source code.
>
> I got stuck when I was following the tutorial at
> http://docs.pylonsproject.org/projects/pyramid/en/latest/narr/install.html
> #easy_install virtualenv seems to work fine but it seems to be using
> python2.4
> When I execute $ virtualenv --no-site-packages env
> then, I get error saying Python interpreter is not current.
>
> So my quess is that when I run the command #easy_install virtualenv,
> it is using python2.4
>
> Is there any way to specify which interpreter to use when I do
> #easy_install virtualenv?
>
> Your input is greatly appreciated.
> Thank you for your time in advance.
>
>           Edward
>
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