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New in 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.
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| 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:
- Module readline:
- Useful example of atexit to read and write readline history files.
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