JezK
Edit File: atexit.py
""" atexit.py - allow programmer to define multiple exit functions to be executed upon normal program termination. One public function, register, is defined. """ __all__ = ["register"] import sys _exithandlers = [] def _run_exitfuncs(): """run any registered exit functions _exithandlers is traversed in reverse order so functions are executed last in, first out. """ exc_info = None while _exithandlers: func, targs, kargs = _exithandlers.pop() try: func(*targs, **kargs) except SystemExit: exc_info = sys.exc_info() except: import traceback print >> sys.stderr, "Error in atexit._run_exitfuncs:" traceback.print_exc() exc_info = sys.exc_info() if exc_info is not None: raise exc_info[0], exc_info[1], exc_info[2] 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 func is returned to facilitate usage as a decorator. """ _exithandlers.append((func, targs, kargs)) return func if hasattr(sys, "exitfunc"): # Assume it's another registered exit function - append it to our list register(sys.exitfunc) sys.exitfunc = _run_exitfuncs if __name__ == "__main__": def x1(): print "running x1" def x2(n): print "running x2(%r)" % (n,) def x3(n, kwd=None): print "running x3(%r, kwd=%r)" % (n, kwd) register(x1) register(x2, 12) register(x3, 5, "bar") register(x3, "no kwd args")