removed 1st edition code

19-coroutine/coroaverager3.py

@@ -1,107 +0,0 @@
-"""
-A coroutine to compute a running average.
-
-Testing ``averager`` by itself::
-
-    >>> coro_avg = averager()
-    >>> next(coro_avg)
-    >>> coro_avg.send(10)
-    >>> coro_avg.send(30)
-    >>> coro_avg.send(6.5)
-    >>> coro_avg.send(None)
-    Traceback (most recent call last):
-       ...
-    StopIteration: Result(count=3, average=15.5)
-
-
-Driving it with ``yield from``::
-
-    >>> def summarize(results):
-    ...     while True:
-    ...         result = yield from averager()
-    ...         results.append(result)
-    ...
-    >>> results = []
-    >>> summary = summarize(results)
-    >>> next(summary)
-    >>> for height in data['girls;m']:
-    ...     summary.send(height)
-    ...
-    >>> summary.send(None)
-    >>> for height in data['boys;m']:
-    ...     summary.send(height)
-    ...
-    >>> summary.send(None)
-    >>> results == [
-    ...     Result(count=10, average=1.4279999999999997),
-    ...     Result(count=9, average=1.3888888888888888)
-    ... ]
-    True
-
-"""
-
-# BEGIN YIELD_FROM_AVERAGER
-from collections import namedtuple
-
-Result = namedtuple('Result', 'count average')
-
-
-# the subgenerator
-def averager():  # <1>
-    total = 0.0
-    count = 0
-    average = None
-    while True:
-        term = yield  # <2>
-        if term is None:  # <3>
-            break
-        total += term
-        count += 1
-        average = total/count
-    return Result(count, average)  # <4>
-
-
-# the delegating generator
-def grouper(results, key):  # <5>
-    while True:  # <6>
-        results[key] = yield from averager()  # <7>
-
-
-# the client code, a.k.a. the caller
-def main(data):  # <8>
-    results = {}
-    for key, values in data.items():
-        group = grouper(results, key)  # <9>
-        next(group)  # <10>
-        for value in values:
-            group.send(value)  # <11>
-        group.send(None)  # important! <12>
-
-    # print(results)  # uncomment to debug
-    report(results)
-
-
-# output report
-def report(results):
-    for key, result in sorted(results.items()):
-        group, unit = key.split(';')
-        print('{:2} {:5} averaging {:.2f}{}'.format(
-              result.count, group, result.average, unit))
-
-
-data = {
-    'girls;kg':
-        [40.9, 38.5, 44.3, 42.2, 45.2, 41.7, 44.5, 38.0, 40.6, 44.5],
-    'girls;m':
-        [1.6, 1.51, 1.4, 1.3, 1.41, 1.39, 1.33, 1.46, 1.45, 1.43],
-    'boys;kg':
-        [39.0, 40.8, 43.2, 40.8, 43.1, 38.6, 41.4, 40.6, 36.3],
-    'boys;m':
-        [1.38, 1.5, 1.32, 1.25, 1.37, 1.48, 1.25, 1.49, 1.46],
-}
-
-
-if __name__ == '__main__':
-    main(data)
-
-# END YIELD_FROM_AVERAGER