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- """
- atexit.py - allow programmer to define multiple exit functions to be executed
- upon normal program termination.
-
- One public function, register, is defined.
- """
-
- _exithandlers = []
- def _run_exitfuncs():
- """run any registered exit functions
-
- _exithandlers is traversed in reverse order so functions are executed
- last in, first out.
- """
-
- while _exithandlers:
- func, targs, kargs = _exithandlers[-1]
- apply(func, targs, kargs)
- _exithandlers.remove(_exithandlers[-1])
-
- def register(func, *targs, **kargs):
- """register a function to be executed upon normal program termination
-
- func - function to be called at exit
- targs - optional arguments to pass to func
- kargs - optional keyword arguments to pass to func
- """
- _exithandlers.append((func, targs, kargs))
-
- import sys
- try:
- x = sys.exitfunc
- except AttributeError:
- sys.exitfunc = _run_exitfuncs
- else:
- # if x isn't our own exit func executive, assume it's another
- # registered exit function - append it to our list...
- if x != _run_exitfuncs:
- register(x)
- del sys
-
- if __name__ == "__main__":
- def x1():
- print "running x1"
- def x2(n):
- print "running x2(%s)" % `n`
- def x3(n, kwd=None):
- print "running x3(%s, kwd=%s)" % (`n`, `kwd`)
-
- register(x1)
- register(x2, 12)
- register(x3, 5, "bar")
- register(x3, "no kwd args")
-
-