Bug report

Bug summary

In an interactive session with a wxpython PyShell, closing a matlotlib figure by clicking on the 'x' in upper right corner causes the python shell to freeze for a few seconds, then it exits without any error message.

Code for reproduction

open PyShell with
python ….\lib\site-packages\wx\py\PyShell.py

Then run:

import matplotlib
matplotlib.use('wxagg')
matplotlib.interactive(True)
matplotlib.pyplot.figure()

Then close the figure by clicking on the 'x' in upper right corner.

Expected outcome

Figure closes and shell can be used for further commands.

Matplotlib version

• Operating system: Windows 10
• Matplotlib version: 3.2.2
• Matplotlib backend (print(matplotlib.get_backend())): wxagg
• Python version: 3.8.3
• Other libraries: wxpython 4.1.0 msw (phoenix) wxWidgets 3.1.4

Installation procedure:
Install Winpython64-3.8.3.0dot.exe
In winpython's command prompt:
pip install wxpython matplotlib

Further notes

Closing the figure with the following command avoids the error:

matplotlib.pyplot.close('all')