Python 3 And Matplotlib Lissue On Linux

I have been facing a couple of issues in using matplotlib with Python 3. After getting rid of this one, I ran into a new one. When I tried to execute the histogram demo, I get this

Solution 1:

Add this to the top of the histogram_demo.py, just before import numpy:

from matplotlib import font_manager
font_manager.USE_FONTCONFIG = False

Or modify font_manager.py to change the value permanently.

As far as bug reports go, I'd report the USE_FONTCONFIG = True setting to the Fedora package manager. The subprocess output decoding issue (or regex pattern issue) in Python 3.x should be reported upstream to the matplotlib project.