Spyder Does Not Run Python Scripts After Matplotlib Upgrade

I was coding in Python 2.7 with Spyder 2.1.9, using matplotlib 1.1. The operating system is Linux Ubuntu 12.04 LTS. I requested the upgrade of matplotlib with sudo pip --upgrade py

Solution 1:

There were many bugs when using matplotlib 1.5 on Spyder versions up to 2.3.7. I guess you should downgrade matplotlib.