Why are there errors when I try to close a window in customtkinter?

Question

I have a very simple data window that I am trying to show and offer an exit button:

import customtkinter as ctk
import matplotlib.pyplot as plt
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg

# create the window using CTK
window = ctk.CTk()

# create the plot of random data
data = [1, 2, 3, 4, 5]
plt.plot(data)

# Add the plot to the window
canvas = FigureCanvasTkAgg(plt.gcf(), master=window)
canvas.draw()
canvas.get_tk_widget().pack(side='top', fill='both', expand=True)

exit_button = ctk.CTkButton(window, text='Exit', command=window.destroy)
exit_button.pack(side='bottom')  # add the exit button to the window

window.mainloop()

The problem is that after clicking Exit, while the window goes away, the terminal keeps running in the background with the following error:

invalid command name "2607166565512update"
    while executing
"2607166565512update"
    ("after" script)
invalid command name "2607167621640check_dpi_scaling"
    while executing
"2607167621640check_dpi_scaling"
    ("after" script)
invalid command name "2607249791944_click_animation"
    while executing
"2607249791944_click_animation"
    ("after" script)

What am I doing wrong and how can I get "Exit" to close the program completely?

acw1668 · Accepted Answer · 2024-05-29 07:51:01Z

1

It is a known issue of mixing tkinter and matplotlib.pyplot.plot(): cannot exit the application after closing the root window.

Use matplotlib.figure.Figure instead:

import customtkinter as ctk
from matplotlib.figure import Figure
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg

# create the window using CTK
window = ctk.CTk()

fig = Figure()
ax = fig.subplots()

# create the plot of random data
data = [1, 2, 3, 4, 5]
ax.plot(data)

# Add the plot to the window
canvas = FigureCanvasTkAgg(fig, master=window)
canvas.draw()
canvas.get_tk_widget().pack(side='top', fill='both', expand=True)

exit_button = ctk.CTkButton(window, text='Exit', command=window.destroy)
exit_button.pack(side='bottom')  # add the exit button to the window

window.mainloop()

edited May 29, 2024 at 7:51

answered May 29, 2024 at 7:45

acw1668

48k5 gold badges30 silver badges39 bronze badges

Sign up to request clarification or add additional context in comments.

4 Comments

ohshitgorillas Over a year ago

thank you!! one small edit to your comment, the figure creation is actually fig = Figure.Figure().

acw1668 Over a year ago

@ohshitgorillas No, it should be fig = Figure() if you use my sample code.

ohshitgorillas Over a year ago

Perhaps the difference is that I'm using Python 3.7.9, but fig = Figure() gave me an error whereas fig = Figure.Figure() succeeded. With fig = Figure() I got the error TypeError: 'module' object is not callable.

ohshitgorillas Over a year ago

Oh, the difference was using import matplotlib.figure as Figure rather than from matplotlib.figure import Figure. For the latter, fig = Figure() works.

Collectives™ on Stack Overflow

Why are there errors when I try to close a window in customtkinter?

1 Answer 1

4 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

4 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related