Hi Jake,
Am Donnerstag, dem 03.04.2025 um 11:36 +0000 schrieb Jake:
> It appears that importing matplotlib.pyplot resets the Matplotlib
> backend to Agg.
>
> $ guix shell python python-matplotlib -- bash -c 'MPLBACKEND=tkagg
> python3 -c "import matplotlib; print(matplotlib.get_backend());
> import matplotlib.pyplot; print(matplotlib.get_backend())"'
>
> TkAgg
> agg
I recently encountered the same issue. The issue is that matplotlib
internally sources a configuration file that sets the backend *after*
reading the environment variable. To circumvent this, you use
something along the lines of the following code until the issue is
fixed:
from matplotlib import set_backend
from os import environ
[…]
if __name__ == '__main__':
if 'MPLBACKEND' in environ: set_backend(environ['MPLBACKEND'])
[…]
Cheers
