interactive matplotlib in virtualenv

[gmoutso]

Hi!
matplotlib.pyplot does not work in virtualenv with pythonic-activate

Steps to reproduce:

1. Create an empty environment with virtualenv -p python2 test
2. Activate with . test/bin/activate
3. Install the MWE requisites with pip install ipython matplotlib pyside
4. In your emacs session, pythonic-activate test
5. run-python
6. enter the magic command %matplotlib qt
7. Next run import matplotlib.pyplot as plt and plt.figure()
   A figure should appear. It doesn't.

How it works in emacs without pythonic-activate:

1. Without activating the virtualenv, run-python
2. Run in the inferior mode the magic command %matplotlib qt
3. Next run import matplotlib.pyplot as plt and plt.figure()
   A figure window should appear

How it works in a virtualenv outside emacs:

1. Create an empty environment with virtualenv -p python2 test
2. Activate with . test/bin/activate
3. Install the MWE requisites pip install ipython matplotlib pyside
4. enter an ipython session
5. enter the magic command %matplotlib qt
6. Next run import matplotlib.pyplot as plt and plt.figure()
   A figure should appear.

[proofit404]

I'm unable to build pyside, so I can't confirm if it is a problem or not.

[gmoutso]

Thank you for your reply and for your work on anaconda mode. I thought this issue was a problem beyond pyside and pyqt. So I decided to test the same with the backend tkagg (which is the default) instead of qt. Now it works as expected! So the problem description is instead " interactive matplotlib in virtualenv with qt backend " using pythonic-activate.

For me, switching to tkagg when using a virtualenv is not a problem. Thanks!

PS. I can pip install pyside on ubuntu successfully but I also have kde installed on my system, which has qt libraries already installed. Maybe that is why you cannot install pyside.

[proofit404]

I have libqt4-dev and cmake installed. Pip install fails with meaningless error message.