When I tried to use matplotlib from Python3 installed by pyenv, the following error occurred.
RuntimeError: Python is not installed as a framework. The Mac OS X backend will not be able to function correctly if Python is not installed as a framework. See the Python documentation for more information on installing Python as a framework on Mac OS X. Please either reinstall Python as a framework, or try one of the other backends. If you are Working with Matplotlib in a virtual enviroment see 'Working with Matplotlib in Virtual environments' in the Matplotlib FAQ
As a result of investigation, similar symptoms were found. I changed the backend of matplotlib rendering by referring to here.
The procedure is as follows.
matplotlibrc in ~ / .matplotlib.~ / .matplotlib / matplotlibrc. ~/.matplotlib/matplotlibrc
backend: TkAgg
Now when I try to run the program using matplotlib again, it works.
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