回答編集履歴
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別解
test
CHANGED
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@@ -17,3 +17,25 @@
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print(wighted_avg(score, amount, 10))
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```
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以下は別解。itertools祭り版。
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```python
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from itertools import chain
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from itertools import islice
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from itertools import repeat
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def wighted_avg(score, amount, top_n):
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flatten = chain.from_iterable(map(repeat, score, amount))
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return sum(islice(flatten, top_n)) / top_n
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```
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