[Python-checkins] CVS: python/dist/src/Lib atexit.py,NONE,1.1

2000年6月28日 08:07:40 -0700

Update of /cvsroot/python/python/dist/src/Lib
In directory slayer.i.sourceforge.net:/tmp/cvs-serv8272/Lib
Added Files:
	atexit.py 
Log Message:
Added the atexit module and documentation from Skip Montanaro
<skip@mojam.com>. Revisions to the markup to make it pass LaTeX, added
an index entry and a reference from the sys.exitfunc documentation.
This closes SourceForge patch #100620.
--- NEW FILE ---
"""
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")