ipython installed in virtualenv seems not to use virtualenv

becky_lewis bex.lewis at gmail.com
Thu Aug 11 11:39:06 CEST 2011


Hi,

are you doing a pip install from within your virtualenv (sourcing the
virtualenv and THEN installing ipython)?

Becky Lewis


On Aug 11, 9:59 am, Gelonida N <gelon... at gmail.com> wrote:
> Hi,
>
> Short version
> ==============
> I have a system with ipython installed by my Ubuntu distribution
> I created a virtualenv with> virtualenv ~/myenv
> I installed ipython
> > pip install ipython --upgrade
>
> When using ipython I notice, that it does import the modules from my
> default python setup and not from  my virtualenv.
>
> Why?
> What could I have done differently?
>
> Long version
> ===================
>
> I created a  virtualenv with
>
> virtualenv ~/myenv
>
> THis inherits my machines site packages.
> The reason I'm not using
>
> virutalenv --no-site-packages ~/myenv
>
> is that I would like to use some of the site packages,
> in particular some, that I don't want to compile due to huge package
> dependencies.
>
> Small problem is, that if I run ipython in a virtualenv
> it will still call /usr/bin/ipython
>
> and if I check the modules, that I import I seem to import the modules
> of my default environment and not the ones of my virtualenv.
>
> So I decided I will install my own version of ipython in my virtualenv
>
> The output if pip install ipython is a little confusing.
>
> > Requirement already satisfied (use --upgrade to upgrade): ipython in /usr/lib/pymodules/python2.6
>
> As I am a normal user and I don't have permissions to overwrite /usr/lib
> I decided to just give it a try and hope it will install in my
> virtualenv path and not in /usr/lib/...
>
> After running
>
> > pip install ipython --upgrade
>
> I have my own version of ipython.
>
> However when calling and using it I notice it still imports the modules
> from my default python and not from my virtualenv?
>
> Why does ipython ignore the virtualenv's settings?
>
> I know there are workarounds, but I wondered why it doesn't work out of
> the box.




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