将字符串拆分为迭代器 [英] Splitting a string into an iterator

问题描述

python是否有内置（意味着在标准库中）对产生迭代器而不是列表的字符串进行拆分？我在考虑使用非常长的字符串而不需要消耗大部分字符串。

Does python have a build-in (meaning in the standard libraries) to do a split on strings that produces an iterator rather than a list? I have in mind working on very long strings and not needing to consume most of the string.

推荐答案

不直接拆分字符串，但 re 模块有 re.finditer（） （以及任何已编译的正则表达式上相应的 finditer（）方法） 。

Not directly splitting strings as such, but the re module has re.finditer() (and corresponding finditer() method on any compiled regular expression).

@Zero要求举个例子：

@Zero asked for an example:

>>> import re
>>> s = "The quick    brown\nfox"
>>> for m in re.finditer('\S+', s):
...     print(m.span(), m.group(0))
... 
(0, 3) The
(4, 9) quick
(13, 18) brown
(19, 22) fox

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