Matplotlib doesn't display graph in virtualenv

Question

I have pip installed matplotlib in my virtualenv and I am trying to plot a simple graph. I use Eclipse and PyDev. When I run the script from Eclipse it doesn\'t display any grap

Answer 1

I had the same issue, and installing matplotlib using easy_install instead of pip did not solve it. In the end, I found out that the problem was simply that matplotlib could not find any backend for plotting.

I solved it by doing the following (I am using Debian wheezy):

pip uninstall matplotlib
sudo apt-get install tcl-dev tk-dev
pip install matplotlib