回答編集履歴
1
combinationsとかありえない
answer
CHANGED
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@@ -8,4 +8,22 @@
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```Python
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sentence = ["I","can","not","understand","deep","learning"]
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result = [sentence[i] for i in sorted(random.sample(range(len(sentence)), k=3))]
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```
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----
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```
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In [1]: import itertools, random
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In [2]: sentence = sorted(list(map(str, range(1000))))
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In [3]: %timeit [sentence[i] for i in sorted(random.sample(range(len(sentence)), k=3))]
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6.7 µs ± 99.3 ns per loop (mean ± std. dev. of 7 runs, 100000 loops each)
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In [4]: %timeit [k for i, k in sorted(random.sample(list(enumerate(sentence)), k=3))]
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49.4 µs ± 604 ns per loop (mean ± std. dev. of 7 runs, 10000 loops each)
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In [5]: %time random.choice(list(itertools.combinations(sentence, 3)))
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CPU times: user 23.3 s, sys: 15 s, total: 38.2 s
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Wall time: 41.6 s
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```
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