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atexit

module

Registers functions to run when the interpreter exits normally.

Syntax

import atexit

Use it for cleanup at the end of a program: save state, close a resource, print a summary. Functions run in reverse order of registration. The mistaken expectation is that they run on abnormal exit: after os._exit, being killed by a signal or a fatal interpreter error they do not run; for cleanup within one block of code prefer with or try/finally.

Examples

import atexit
atexit.register(print, 'первым зарегистрирован — последним вызван')
atexit.register(print, 'до свидания')
print('работа')  # → работа
# при выходе: «до свидания», затем «первым зарегистрирован — последним вызван»

See also

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