[Python-checkins] CVS: python/dist/src/Lib threading.py,1.17,1.18

[Martin v. L?wis]

Update of /cvsroot/python/python/dist/src/Lib
In directory usw-pr-cvs1:/tmp/cvs-serv28325/Lib

Modified Files:
	threading.py 
Log Message:
Patch #428326: New class threading.Timer.


Index: threading.py
===================================================================
RCS file: /cvsroot/python/python/dist/src/Lib/threading.py,v
retrieving revision 1.17
retrieving revision 1.18
diff -C2 -d -r1.17 -r1.18
*** threading.py	2001/08/20 20:27:58	1.17
--- threading.py	2001/09/05 13:44:54	1.18
***************
*** 332,336 ****
          self.__cond.release()
  
- 
  # Helper to generate new thread names
  _counter = 0
--- 332,335 ----
***************
*** 484,487 ****
--- 483,516 ----
          self.__daemonic = daemonic
  
+ # The timer class was contributed by Itamar Shtull-Trauring
+ 
+ def Timer(*args, **kwargs):
+     return _Timer(*args, **kwargs)
+ 
+ class _Timer(Thread):
+     """Call a function after a specified number of seconds:
+     
+     t = Timer(30.0, f, args=[], kwargs={})
+     t.start()
+     t.cancel() # stop the timer's action if it's still waiting
+     """
+     
+     def __init__(self, interval, function, args=[], kwargs={}):
+         Thread.__init__(self)
+         self.interval = interval
+         self.function = function
+         self.args = args
+         self.kwargs = kwargs
+         self.finished = Event()
+     
+     def cancel(self):
+         """Stop the timer if it hasn't finished yet"""
+         self.finished.set()
+     
+     def run(self):
+         self.finished.wait(self.interval)
+         if not self.finished.isSet():
+             self.function(*self.args, **self.kwargs)
+         self.finished.set()
  
  # Special thread class to represent the main thread