Note on tkagg: I've tried to add

except KeyboardInterrupt:
    first_manager.window.destroy()

matplotlib/lib/matplotlib/backends/_backend_tk.py

Lines 522 to 525 in 6501209

    
           try: 
        
               first_manager.window.mainloop() 
        
           finally: 
        
               manager_class._owns_mainloop = False

and that indeed closes the window. But when trying to show the next figure, I get a stack trace

---------------------------------------------------------------------------
TclError                                  Traceback (most recent call last)
Cell In[5], line 1
----> 1 plt.show()

File ~/git/matplotlib/lib/matplotlib/pyplot.py:526, in show(*args, **kwargs)
    482 """
    483 Display all open figures.
    484 
   (...)
    523 explicitly there.
    524 """
    525 _warn_if_gui_out_of_main_thread()
--> 526 return _get_backend_mod().show(*args, **kwargs)

File ~/git/matplotlib/lib/matplotlib/backend_bases.py:3398, in _Backend.show(cls, block)
   3396 for manager in managers:
   3397     try:
-> 3398         manager.show()  # Emits a warning for non-interactive backend.
   3399     except NonGuiException as exc:
   3400         _api.warn_external(str(exc))

File ~/git/matplotlib/lib/matplotlib/backends/_backend_tk.py:561, in FigureManagerTk.show(self)
    559     self.canvas.draw_idle()
    560 if mpl.rcParams['figure.raise_window']:
--> 561     self.canvas.manager.window.attributes('-topmost', 1)
    562     self.canvas.manager.window.attributes('-topmost', 0)
    563 self._shown = True

File ~/anaconda3/envs/mpl-dev/lib/python3.11/tkinter/__init__.py:2032, in Wm.wm_attributes(self, *args)
   2014 """This subcommand returns or sets platform specific attributes
   2015 
   2016 The first form returns a list of the platform specific flags and
   (...)
   2029 On Unix, there are currently no special attribute values.
   2030 """
   2031 args = ('wm', 'attributes', self._w) + args
-> 2032 return self.tk.call(args)

TclError: can't invoke "wm" command: application has been destroye

It seems that Tk is not creating a new application for every plot. But I'm too little of a Tk expert to find out how to do this properly. Ping @daniilS do you know how to handle this?

	try:
	first_manager.window.mainloop()
	finally:
	manager_class._owns_mainloop = False

Uh oh!

[ENH]: Ctrl+C on a blocking show() should close the figure window #23385

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