ch11-24: clean up by @eumiro & sync with Atlas

19-coroutine/coroaverager0.py

@@ -0,0 +1,28 @@
+"""
+A coroutine to compute a running average
+
+# tag::CORO_AVERAGER_TEST[]
+    >>> coro_avg = averager()  # <1>
+    >>> next(coro_avg)  # <2>
+    >>> coro_avg.send(10)  # <3>
+    10.0
+    >>> coro_avg.send(30)
+    20.0
+    >>> coro_avg.send(5)
+    15.0
+
+# end::CORO_AVERAGER_TEST[]
+
+"""
+
+# tag::CORO_AVERAGER[]
+def averager():
+    total = 0.0
+    count = 0
+    average = None
+    while True:  # <1>
+        term = yield average  # <2>
+        total += term
+        count += 1
+        average = total/count
+# end::CORO_AVERAGER[]