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