V2EX › kaitolucifer 的所有回复 › 第 1 页 / 共 1 页

V2EX = way to explore

V2EX 是一个关于分享和探索的地方

现在注册

已注册用户请登录

2020-10-22 19:29:10 +08:00

回复了 JCZ2MkKb5S8ZX9pq 创建的主题 › Python › Python 多个列表相加怎么写

The issue of quadratic performance of sum(sequences, null_seq) is known, which is why the doc says that sum() is for numbers and recommends .join for strings and itertools.chain for other sequences.

上面那个 sum trick 貌似很慢？