Executing a function when the console window closes?

Question

I want to execute a function when the program is closed by user.

For example, if the main program is time.sleep(1000),how can I write a txt to record unexpected termination of the program.

The program is packaged into exe by cxfreeze. Click the "X" to close the console window.

I know atexit can deal with sys.exit(),but is there a more powerful way can deal with close window event?

Questions

1. Is this possible in Python?
2. If so, how can I do this?

Answer 1

The closest you will get is using an exit handler:

def bye():
    print('goodbye world!!')

import atexit
atexit.register(bye)

This may not work depending on technical details of how python is terminated (it relies on normal interpreter termination)

Answer 2

You can use the atexit module to register functions to be executed when the program exits.

Answer 3

The simplest way would be to wrap your behavior in a try/finally, with your exit behavior in the finally block.

try:
  normal_behavior()
finally:
  on_exit_behavior()