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(python2.1-lib.info)atexit

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Exit handlers
=============

This module was written by Skip Montanaro <skip@mojam.com>.
This manual section was written by Skip Montanaro <skip@mojam.com>.
Register and execute cleanup functions.

_Added in Python version 2.0_

The `atexit' module defines a single function to register cleanup
functions.  Functions thus registered are automatically executed upon
normal interpreter termination.

Note: the functions registered via this module are not called when the
program is killed by a signal, when a Python fatal internal error is
detected, or when `os._exit()' is called.

This is an alternate interface to the functionality provided by the
`sys.exitfunc' variable.

Note: This module is unlikely to work correctly when used with other
code that sets `sys.exitfunc'.  In particular, other core Python
modules are free to use `atexit' without the programmer's knowledge.
Authors who use `sys.exitfunc' should convert their code to use
`atexit' instead.  The simplest way to convert code that sets
`sys.exitfunc' is to import `atexit' and register the function that had
been bound to `sys.exitfunc'.

`register(func[, *args[, **kargs]])'
     Register FUNC as a function to be executed at termination.  Any
     optional arguments that are to be passed to FUNC must be passed as
     arguments to `register()'.

     At normal program termination (for instance, if `sys.exit()' is
     called or the main module's execution completes), all functions
     registered are called in last in, first out order.  The assumption
     is that lower level modules will normally be imported before
     higher level modules and thus must be cleaned up later.

See also:
     Note: readline Useful example of `atexit' to read and write
     `readline' history files.

atexit Example