python 正则表达式

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最新推荐文章于 2024-09-15 16:47:21 发布

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本文链接：https://blog.csdn.net/github_36570274/article/details/103615351

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本文深入探讨Python中正则表达式的使用技巧，通过实例演示如何利用findall()和finditer()方法查找文本中所有匹配项，如在句子中找出所有副词。这不仅展示了正则表达式的强大功能，还提供了实际操作的代码示例。

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python re document

Regular Expression

findall() matches all occurrences of a pattern, not just the first one as search() does. For example, if a writer wanted to find all of the adverbs in some text, they might use findall() in the following manner:

>>> text = "He was carefully disguised but captured quickly by police."
>>> re.findall(r"\w+ly", text)
['carefully', 'quickly']

也可以采用如下方式:

pattern = re.compile(r’regular_expression’)
pattern.findall(text)

finditer() get more information about all matches of a pattern

>>> text = "He was carefully disguised but captured quickly by police."
>>> for m in re.finditer(r"\w+ly", text):
...     print('%02d-%02d: %s' % (m.start(), m.end(), m.group(0)))
07-16: carefully
40-47: quickly