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Forcing the use of the TkAgg Matplot lib backend prevents usage in notebooks #40

philwinder opened this issue Jul 1, 2019 · 1 comment


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commented Jul 1, 2019

Hi there. In a few places you force the use of TkAgg. In the past this was necessary to work on certain systems, but I believe this is no longer the case with newer versions of Matplotlib.

However, forcing TkAgg breaks the code on, for example, Google Colab.

I see it was introduced in this commit: e089dd9

I think the easiest solution is to revert that commit and test again on the original system that was having issues (probably OSX).

Here is the most simple reproduction:


!pip install simple_rl
from simple_rl.tasks import GridWorldMDP



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commented Aug 7, 2019

Yes, indeed the TkAgg backend was being used to fix some issues on OSX. I will test taking TkAgg out, thanks!

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