I tried to import matplotlib.pyplot, however received an error relating to python-tk not being installed. It appears to be installed but I still appear to be receiving the error
No such file or directory, please install the python-tk package
Install the package using:
sudo apt-get install python-tk
As a temporary arrangement just do
mv libBLT.2.4.so.8.6 libBLT.2.4.so.8.5
under /usr/lib/ . It should work fine again
See debian bugreport: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=751767 (as far as I know, matplotlib does not depend on "blt")