how to exit from a pyplot loop?

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...

Do you think you could give an example of a short code-snippet which can demonstrate this behaviour? Although your debugging looks interesting, it's hard to test ourselves without an example. — Andy Hayden
– Andy Hayden, Commented Nov 15, 2012 at 14:29
Are you using any IDE, or just the console? Some IDE's doing interesting things behind the curtain to manage the GUI Loop which might be giving you trouble. — Chris Zeh
– Chris Zeh, Commented Nov 15, 2012 at 18:37
1) do you have plt.ion()? 2) are you not using a version of matplotlib older than 1.0? — ev-br
– ev-br, Commented Nov 15, 2012 at 23:36

Community · Accepted Answer · 2017-05-23 11:56:11Z

6

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?,

edited May 23, 2017 at 11:56

CommunityBot

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answered Nov 16, 2012 at 23:26

tacaswell

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