Sep 16, 2008 · Keep in mind that sys.exit(), exit(), quit(), and os._exit(0) kill the Python interpreter. Therefore, if it appears in a script called from another script by execfile() , it stops execution of both scripts.

Oct 23, 2012 · There is sys.exit() which is part of the sys module, and there is exit() and quit() which is a built-in. However, sys.exit() is intended for programs not in IDLE (python interactive), while the built-in exit() and quit() functions are intended for use in IDLE.

Nov 3, 2013 · quit() simply raises the SystemExit exception. Furthermore, if you print it, it will give a message: >>> print (quit) Use quit() or Ctrl-Z plus Return to exit >>> This functionality was included to help people who do not know Python. After all, one of the most likely things a newbie will try to exit Python is typing in quit.

Jun 10, 2010 · For the "q" (quit) option in my program menu, I have the following code: elif choice == "q": print() That worked all right until I put it in an infinite loop, which kept printing blank lines. Is

While the previous answers are helpful, they don't always work in all situations. If you have a Python-CV window open, which is waiting for a key press to quit, while running from inside vim, as a (weirdly specific) example, and you accidentally close the window normally, it will continue to run and Ctrl+C and Ctrl+Z might simply print to the terminal and get ignored.

The exit() and quit() built in functions do just what you want. No import of sys needed. No import of sys needed. Alternatively, you can raise SystemExit , but you need to be careful not to catch it anywhere (which shouldn't happen as long as you specify the type of …

Jan 26, 2010 · There is also an _exit() function in the os module. The sys.exit() function raises a SystemExit exception to exit the program, so try statements and cleanup code can execute. The os._exit() version doesn't do this. It just ends the program without doing any cleanup or flushing output buffers, so it shouldn't normally be used.

Jan 13, 2009 · @kramer65: A program exit code of 0 means "finished without errors". Since the sys.exit call appears to be caused by an error, it should yield a program exit code that is not 0. 1 is just a suggestion. –

Apr 21, 2018 · Generally, the best way to end a Python program is just to let the code run to completion. For example, a script that looks for "hello" in a file could look like this:

+1 on using a return statement instead. Using a return statement (with or without a return value) means that your python program can be used from within an interactive session, or as part of some other script. I get very irritated at scripts that call sys.exit and dump me out of …