40 lines
669 B
Markdown
40 lines
669 B
Markdown
+++
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date = '2025-08-10T12:37:16Z'
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title = '正则'
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+++
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## 原子组
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不回溯
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```regex
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(?>...)
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```
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## 占有量词
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不回溯
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```regex
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.*+
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.++
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.?+
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```
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## 详细模式（Verbose Mode / Free-Spacing Mode）
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```python
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regex_verbose = r"""
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^ # 匹配字符串开头
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(\d{4}) # 捕获四位数的年份
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- # 匹配连字符
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(\d{2}) # 捕获两位数的月份
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- # 匹配连字符
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(\d{2}) # 捕获两位数的日期
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$ # 匹配字符串结尾
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"""
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date_string = "2023-10-26"
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match = re.match(regex_verbose, date_string, re.VERBOSE)
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```
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