29 lines
502 B
Python
29 lines
502 B
Python
"""
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>>> avg = make_averager()
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>>> avg(10)
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10.0
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>>> avg(11)
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10.5
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>>> avg(12)
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11.0
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>>> avg.__code__.co_varnames
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('new_value', 'total')
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>>> avg.__code__.co_freevars
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('series',)
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>>> avg.__closure__ # doctest: +ELLIPSIS
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(<cell at 0x...: list object at 0x...>,)
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>>> avg.__closure__[0].cell_contents
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[10, 11, 12]
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"""
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def make_averager():
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series = []
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def averager(new_value):
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series.append(new_value)
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total = sum(series)
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return float(total)/len(series)
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return averager
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