Question

I have a python program using pyplot (backend:tkagg), in which simply a matplotlib is created with some stuff in it.
When I want to exit the program, I immediately call:

plt.close('all')

to shut it down.
Strangely enough, the program dosnt exit.

Following it with the debugger I saw that after everithing is done, it returns to

class Show(ShowBase):
    def mainloop(self):
        Tk.mainloop()

in backend_tkagg.py,

followed by

if not is_interactive():
            self.mainloop()

in the same file, then to

def show(*args, **kw):
    global _show
    _show(*args, **kw)

in pyplot.py
So it appears that I am still in the pyplot loop!

How do I exit from it correctly?

thanks…

Answer 1

You are not in the pyplot loop per-say, but the main loop associated with the GUI toolkit (this is the loop that deals with all the user interactions with the GUI). I suspect it is safe to just call exit() in your program and let object clean up deal with properly tearing down the TK objects/mainloop

maybe related :
Exit Tks mainloop in Python?,