diff -r 99be11bd4acc Doc/library/multiprocessing.rst
--- a/Doc/library/multiprocessing.rst	Tue Mar 13 14:34:04 2012 -0700
+++ b/Doc/library/multiprocessing.rst	Wed Mar 14 15:23:01 2012 -0300
@@ -1719,6 +1719,11 @@
 Wait for the worker processes to exit. One must call :meth:`close` or
 :meth:`terminate` before using :meth:`join`.
 
+ .. method:: is_alive
+
+ Return whether any process is alive in the Pool. One must call
+ :meth:`close` or :meth:`terminate` before using :meth:`is_alive`.
+
 
 .. class:: AsyncResult
 
diff -r 99be11bd4acc Lib/multiprocessing/pool.py
--- a/Lib/multiprocessing/pool.py	Tue Mar 13 14:34:04 2012 -0700
+++ b/Lib/multiprocessing/pool.py	Wed Mar 14 15:23:01 2012 -0300
@@ -325,6 +325,14 @@
 assert self._state == RUN
 return self._map_async(func, iterable, mapstar, chunksize)
 
+ def is_alive(self):
+ '''
+ Return whether there are any active processes in a closed or
+ terminated Pool.
+ '''
+ assert self._state in (CLOSE, TERMINATE)
+ return any(p.is_alive() for p in self._pool)
+
 def _map_async(self, func, iterable, mapper, chunksize=None, callback=None,
 error_callback=None):
 '''
diff -r 99be11bd4acc Lib/test/test_multiprocessing.py
--- a/Lib/test/test_multiprocessing.py	Tue Mar 13 14:34:04 2012 -0700
+++ b/Lib/test/test_multiprocessing.py	Wed Mar 14 15:23:01 2012 -0300
@@ -1245,6 +1245,25 @@
 join()
 self.assertLess(join.elapsed, 0.5)
 
+ def test_is_alive(self):
+ p = multiprocessing.Pool()
+ p.apply_async(sqr, (10, 60))
+ p.close()
+
+ self.assertTrue(p.is_alive())
+
+ p.terminate()
+ p.join()
+
+ self.assertFalse(p.is_alive())
+
+ p = multiprocessing.Pool()
+ p.apply_async(mul)
+ p.close()
+ p.join()
+
+ self.assertFalse(p.is_alive())
+
 def raising():
 raise KeyError("key")
 
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