exit python program without close Tkinter window

Question

when I was working with Tkinter in python, I encountered an interesting problem that when I run a python program in Linux Terminal, my code opened a Tkinter widget like this:

root = Tk()
root.title("Hello World")
txt = Text(root, width=60, height=20, wrap="word")
txt.insert(INSERT, "HELLO WORLD")
txt.insert(END, "---------------END---------------")
txt.config(state=DISABLED)
txt.bind("<Leave>", close_when_lost_focus)
txt.pack()
root.mainloop()

and then I force quit python program with Ctrl + Z, the Tkinter window was still there and I couldn't close it until I closed the Terminal. Any body knows what happened?

Bryan Oakley · Accepted Answer · 2017-08-05 16:03:33Z

1

control-z doesn't force quit a program. It is more like putting it to sleep, or suspending it. You can cause the program to resume by typing the command fg (foreground) or bg (background).

fg brings it to the foreground, which makes it as if you never typed control-z.

bg places the job in the background and lets it continue running while allowing you to type additional commands in the terminal.

For more information see What is effect of CTRL + Z on a unix\Linux application

edited Aug 5, 2017 at 16:03

answered Aug 5, 2017 at 15:59

Bryan Oakley

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2 Comments

GIZ Over a year ago

Because of that, the Python script stops executing. Once brought back to the foreground process group, it'll start processing the previously generated events when the script was asleep.

tset0401 Over a year ago

thank you for that, I thought ctrl + z and ctrl + c are all force quit command :))

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