WebSep 10, 2011 · 3 Answers Sorted by: 3 As listed, your code will always just return None. It goes through all the recursion, and does this until the condition is not met, and then drops out the end of the function and returns None. For example, try this: def f (x): if (x<10): return f (x+1) return x and build up from this to do something useful. Share Follow WebApr 11, 2024 · 1. Using the quit() Function. The quit() function is a simple way to exit a Python program. It raises the SystemExit exception, which causes the program to terminate. To use it, simply call the quit() function in your program:. if user_input == 'exit': quit() Note that the quit() function is meant to be used in the interactive interpreter, and …
Python exit commands: quit(), exit(), sys.exit() and os._exit()
WebMar 16, 2024 · In my python interpreter exit is actually a string and not a function -- 'Use Ctrl-D (i.e. EOF) to exit.'. You can check on your interpreter by entering type (exit) In active python what is happening is that exit is a function. If you do not call the function it will print out the string representation of the object. WebNov 12, 2008 · The "unclean exit" function is os._exit (), which does terminate abruptly (it's used largely to kill workers in fork -based multiprocessing scenarios to avoid invoking cleanup that the parent process set up before the fork ). – ShadowRanger Dec 2, 2024 at 14:19 Add a comment 133 From the documentation for sys.exit: show me updates
Exit a program conditional on input (Python 2) - Stack Overflow
WebMay 15, 2009 · I'd recommend using Python's with statement for managing resources that need to be cleaned up. The problem with using an explicit close() statement is that you have to worry about people forgetting to call it at all or forgetting to place it in a finally block to prevent a resource leak when an exception occurs.. To use the with statement, create a … WebJul 27, 2009 · import sys sys.exit (1) # Or something that calls sys.exit (). If you need to exit without raising SystemExit: import os os._exit (1) I do this, in code that runs under unittest and calls fork (). Unittest gets when the forked process raises SystemExit. This is definitely a corner case! Share. Improve this answer. show me urban air