[Python] Matplotlib cannot switch backend to 'TkAgg', as 'qt' is currently running

I am trying to display a plot in Pycharm Comunity Edition and I get the following error:

UserWarning: Matplotlib is currently using agg, which is a non-GUI backend, so >cannot show the figure.
​

I have installed and imported tkinter before importing matplotlib but I cannot make Matplotlib switch to 'TKAgg'.

I tried running

matplotlib.use('TKAgg', force=True)


and

plt.switch_backend('tkagg')


and they both result in the following error:

ImportError: Cannot load backend 'TkAgg' which requires the 'tk' interactive >framework, as 'qt' is currently running
​

I also tried adding MPLBACKEND=TkAgg to the environment variables but did not change anything.

Does anyone have an idea what else I can do to solve this so that I can display graphs?

Continue reading...