January 2018
Intermediate to advanced
856 pages
17h 17m
Chinese
Content preview from Python 技術手冊 第三版
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第 7 章 核心內建功能和標準程式庫模組
我們已經為
itertools
的許多屬性展示等效的產生器和 genexps，但重要
的是
itertools
型別所帶來的速度。舉個簡單的例子，考慮重複某個動作
10 次：
for _ in itertools.repeat(0, 10): pass
取決於 Python 發行版本和平台，這可能會比最直接的做法快了 10% 到
20%：
for _ in range(10): pass
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