May 14, 2017
diff --git a/16-coroutine/coroaverager3.py b/16-coroutine/coroaverager3.py

 # the delegating generator
 def grouper(results, key):  # <5>
    while True:  # <6>
        results[key] = yield from averager()  # <7>
    # while True:       # <6>
    results[key] = yield from averager()  # <7>
    # When group.send(None) is called, group runs to the yield statement below
    # without raising StopIteration and creating a useless new instance of averager
    yield


 # the client code, a.k.a. the caller
Original file line number	Diff line number	Diff line change
Expand Up		@@ -63,8 +63,11 @@ def averager(): # <1>

		# the delegating generator
		def grouper(results, key): # <5>
		while True: # <6>
		results[key] = yield from averager() # <7>
		# while True: # <6>
		results[key] = yield from averager() # <7>
		# When group.send(None) is called, group runs to the yield statement below
		# without raising StopIteration and creating a useless new instance of averager
		yield


		# the client code, a.k.a. the caller
Expand Down