From within a virtual environment, trying to load a script which uses matplotlib's GTKAgg backend, I fail with the following traceback:
Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/home/user/.virtualenvs/venv/local/lib/python2.7/site-packages/matplotlib/pyplot.py", line 97, in <module> _backend_mod, new_figure_manager, draw_if_interactive, _show = pylab_setup() File "/home/user/.virtualenvs/venv/local/lib/python2.7/site-packages/matplotlib/backends/__init__.py", line 25, in pylab_setup globals(),locals(),[backend_name]) File "/home/user/.virtualenvs/venv/local/lib/python2.7/site-packages/matplotlib/backends/backend_gtkagg.py", line 10, in <module> from matplotlib.backends.backend_gtk import gtk, FigureManagerGTK, FigureCanvasGTK,\ File "/home/user/.virtualenvs/venv/local/lib/python2.7/site-packages/matplotlib/backends/backend_gtk.py", line 16, in <module> raise ImportError("Gtk* backend requires pygtk to be installed.") ImportError: Gtk* backend requires pygtk to be installed. The code which I ran in order to produce that ImportError is as follows:
import matplotlib as mpl mpl.use('GTKAgg') import matplotlib.pyplot as plt When running the very same code after deactivating my virtual environment, everything goes well.
I assumed this may be due to version differences; indeed, such differences exist on my machine. However, the version in the virtual environment is newer (1.2.0 versus 1.1.1rc), so I am not expecting less support.
In case it is not clear: my question is how to allow importing pyplot with GTKAgg backend on a new version of matplotlib, or at least an attempt to understand the reasons for this import failure.