This looks like a bug to me, but maybe someone knows better...
After updating to matplotlib 3.0, I get the following problem on animations
that use blitting: A horizontal bar appears at the bottom and a vertical bar
on the right of function animation plots. The attached screenshot shows the
problem for the "The Bayes update? example from the matplotlib animation
This same problem occurs on all animation files I?ve tried that use
blitting. None of them had the problem before I updated.
Interestingly enough, when I save the animation to an mpeg4 file, there is
no problem in the saved movie file.
This occurs on a system configured as follows:
Python: 3.7.0 Anaconda distribution