ImportError: matplotlib is required for plotting when the default backend "matplotlib" is selected

[dickreuter]

I recently started to get this error with the latest pyinstaller from github (and also prod versions installed via pip):

It only happens when I run the pyinstalled packaged version of my code. Any suggestions how this could be resolved? thanks

ImportError: matplotlib is required for plotting when the default backend "matplotlib" is selected.
Traceback (most recent call last):
  File "poker\gui\action_and_signals.py", line 275, in <lambda>
  File "poker\gui\action_and_signals.py", line 432, in update_strategy_analyser
  File "poker\gui\action_and_signals.py", line 446, in strategy_analyser_update_plots
  File "poker\gui\plots\bar_plotter_2.py", line 78, in drawfigure
  File "pandas\plotting\_core.py", line 892, in __call__
  File "pandas\plotting\_core.py", line 1814, in _get_plot_backend
  File "pandas\plotting\_core.py", line 1757, in _load_backend
ImportError: matplotlib is required for plotting when the default backend "matplotlib" is selected.

[rokm]

This seems to be just what the error is saying - matplotlib is not present in the frozen application (which uses default pandas.plotting backend).

Can you check if build\<name>\Analysis-00.toc lists any matplotlib modules?
If not, check if the build log contains any matplotlib related messages (e.g., Loading module hook 'hook-matplotlib.py' from ...).
If not, check if the environment from which you are running pyinstaller (which may or may not be the same as the one you use when you run source version of your code) has matplotlib installed?

[dickreuter]

Downgrading to pandas 1.2.4 resolved the issue.

…

On Sun, 11 Jul 2021 at 08:53, Rok Mandeljc ***@***.***> wrote: This seems to be just what the error is saying - matplotlib is not present in the frozen application. Can you check if build\<name>\Analysis-00.toc lists any matplotlib modules? If not, check if the build log contains any matplotlib related messages (e.g., Loading module hook 'hook-matplotlib.py' from ...). If not, check if the environment from which you are running pyinstaller (which may or may not be the same as the one you use when you run source version of your code) has matplotlib installed? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#5994 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAJSW7SKKBHRGJQTD4RAH3TTXFEYHANCNFSM5AEVRWLQ> .

[michaeleveringham]

For others having the same issue and don't want to downgrade anything, you can add import pandas.plotting._matplotlib to resolve this.

---

If you're trying to use plt.show() you may get UserWarning: Matplotlib is currently using agg, which is a non-GUI backend, so cannot show the figure. Explicitly setting the matplotlib backend resolves this, however, you'll have to first explicitly import the backend from matplotlib.backends and then use it.

import matplotlib
import matplotlib.backends.backend_tkagg
matplotlib.use('tkagg')