[Bug]: 3.6.0 doesn't interact well with pycharm throwing "backend_interagg" exception

[ucfbrd]

Bug summary

While using Pycharm and matplotlib 3.6.0 as soon as we import matplotlib, the interpreter crash

Code for reproduction

import matplotlib.pyplot as plt
plt.figure(1)

Actual outcome

    canvas_class = backend_mod.FigureCanvas
AttributeError: module 'backend_interagg' has no attribute 'FigureCanvas'

Expected outcome

same thing works with version 3.5.2

Additional information

No response

Operating system

No response

Matplotlib Version

3.6.0

Matplotlib Backend

module://backend_interagg

Python version

3.8

Jupyter version

No response

Installation

No response

[tacaswell]

Does this change make it work?

✔ 14:16:01 $ git diff
diff --git a/lib/matplotlib/pyplot.py b/lib/matplotlib/pyplot.py
index f5c86de126..1e94d90d15 100644
--- a/lib/matplotlib/pyplot.py
+++ b/lib/matplotlib/pyplot.py
@@ -263,7 +263,6 @@ def switch_backend(newbackend):

     backend_mod = importlib.import_module(
         cbook._backend_module_name(newbackend))
-    canvas_class = backend_mod.FigureCanvas

     required_framework = _get_required_interactive_framework(backend_mod)
     if required_framework is not None:
@@ -293,6 +292,8 @@ def switch_backend(newbackend):
     # also update backend_mod accordingly; also, per-backend customization of
     # draw_if_interactive is disabled.
     if new_figure_manager is None:
+        # only try to get the canvas class if have opted into the new scheme
+        canvas_class = backend_mod.FigureCanvas
         def new_figure_manager_given_figure(num, figure):
             return canvas_class.new_manager(figure, num)

[TLCFEM]

I do not think this PR fixes the problem, after applying the changes, now exception is thrown on Line 185

line 185, in _get_required_interactive_framework
    if not hasattr(backend_mod.FigureCanvas, "required_interactive_framework"):
AttributeError: module 'backend_interagg' has no attribute 'FigureCanvas'. Did you mean: 'FigureCanvasAgg'?

[TLCFEM]

One more check needs to be added:

def _get_required_interactive_framework(backend_mod):
    if not hasattr(backend_mod, 'FigureCanvas') or not hasattr(backend_mod.FigureCanvas, "required_interactive_framework"):
        _api.warn_deprecated(
            "3.6", name="Support for FigureCanvases without a "
            "required_interactive_framework attribute")
        return None
    # Inline this once the deprecation elapses.
    return backend_mod.FigureCanvas.required_interactive_framework

[QuLogic]

I don't believe the latter check was implemented.

[TLCFEM]

I don't believe the latter check was implemented.

No, it's not.

[HarmvandenBrand]

Can confirm this is still an issue with matplotlib 3.6.0 on python 3.10 in PyCharm 2022.2.2

[nfeliccia]

Not working on PycharmPro

import matplotlib.pyplot as plt

pizza, marshmallows = plt.subplots(1, 1)
print(pizza)

Error

Traceback (most recent call last):
  File "F:\gt_stats_iii\scipy_stats_binom_examples.py", line 8, in <module>
    pizza, marshmallows  = plt.subplots(1, 1)
  File "F:\gt_stats_iii\venv\lib\site-packages\matplotlib\pyplot.py", line 1430, in subplots
    fig = figure(**fig_kw)
  File "F:\gt_stats_iii\venv\lib\site-packages\matplotlib\_api\deprecation.py", line 454, in wrapper
    return func(*args, **kwargs)
  File "F:\gt_stats_iii\venv\lib\site-packages\matplotlib\pyplot.py", line 771, in figure
    manager = new_figure_manager(
  File "F:\gt_stats_iii\venv\lib\site-packages\matplotlib\pyplot.py", line 346, in new_figure_manager
    _warn_if_gui_out_of_main_thread()
  File "F:\gt_stats_iii\venv\lib\site-packages\matplotlib\pyplot.py", line 336, in _warn_if_gui_out_of_main_thread
    if (_get_required_interactive_framework(_get_backend_mod()) and
  File "F:\gt_stats_iii\venv\lib\site-packages\matplotlib\pyplot.py", line 206, in _get_backend_mod
    switch_backend(dict.__getitem__(rcParams, "backend"))
  File "F:\gt_stats_iii\venv\lib\site-packages\matplotlib\pyplot.py", line 266, in switch_backend
    canvas_class = backend_mod.FigureCanvas
AttributeError: module 'backend_interagg' has no attribute 'FigureCanvas'. Did you mean: 'FigureCanvasAgg'?

Process finished with exit code 1

[mposter1]

Problem still occurring in PyCharm for me. Still requires FigureCanvas on backend module, running matplotlib 3.8.1. See line 342 of pyplot.py

[ksunden]

Not having a FigureCanvas class as a backend was deprecated in mpl 3.6 and expired in 3.8, it looks like the most recent versions of PyCharm do have it, so perhaps you need to update?

[QuLogic]

AFAICT, JetBrains added those values over a year ago, but I cannot tell from the tags exactly what version that means.

[mposter1]

Update fixed. Thanks.

[benyoung-libenyang]

maybe you cloud try.

[oukohou]

maybe you cloud try.

great，this fixed my problem.