如何捕获正则表达式python中的两个前瞻

Question

这是一个字符串：

str = "Academy \nADDITIONAL\nAwards and Recognition: Greek Man of the Year 2011 Stanford PanHellenic Community, American Delegate 2010 Global\nEngagement Summit, Honorary Speaker 2010 SELA Convention, Semi-Finalist 2010 Strauss Foundation Scholarship Program\nComputer Skills: Competency: MATLAB, MySQL/PHP, JavaScript, Objective-C, Git Proficiency: Adobe Creative Suite, Excel\n(highly advanced), PowerPoint, HTML5/CSS3\nLanguages: Fluent English, Advanced Spanish\n\x0c"

我想从“ ADDTIONAL”捕捉到“ Languages”，所以我写了这个正则表达式：

regex = r'(?<=\n(ADDITIONAL|Additional)\n)[\s\S]+?(?=\n(Languages|LANGUAGES)\n*)'

但是，它只能捕获介于两者之间的所有内容([\s\S]+)。它不会捕获ADDTIONAL＆Languages。我在这里想念什么？

Answer 1

你的正则表达式是

regex = r'(?<=\n(ADDITIONAL|Additional)\n)[\s\S]+?(?=\n(Languages|LANGUAGES)\n*)'

你的字符串是

Academy \nADDITIONAL\nAwards and Recognition: ... \nLanguages:
                     ^^                          ^^
                     ||                          ||
Match Position:-(?<=\n(ADDITIONAL|Additional)\n)(?=\n(Languages|LANGUAGES)\n*)

因此[\s\S]+?将包含这两个位置之间的内容，不包括ADDITIONAL和LANGUAGES。

您只需找到 的起始位置ADDITIONAL和结束位置即可LANGUAGES。这可以使用以下正则表达式来完成

(?=\n(ADDITIONAL|Additional)\n)([\s\S]+?)(?<=\n(Languages|LANGUAGES)\b)

此外，如果您[\s\S]+?只想捕获所有内容，那么您可以使用非捕获Additional组Languages

(?=\n(?:ADDITIONAL|Additional)\n)[\s\S]+?(?<=\n(?:Languages|LANGUAGES)\b)

Academy \nADDITIONAL\nAwards and Recognition: ... \nLanguages:
        ^^                                                  ^^
        ||                                                  ||
(?=\n(ADDITIONAL|Additional)\n)             (?<=\n(Languages|LANGUAGES))

Python代码

p = re.compile(r'(?=\n(?:ADDITIONAL|Additional)\n)[\s\S]+?(?<=\n(?:Languages|LANGUAGES)\b)', re.MULTILINE)
test_str = "Academy \nADDITIONAL\nAwards and Recognition: Greek Man of the Year 2011 Stanford PanHellenic Community, American Delegate 2010 Global\nEngagement Summit, Honorary Speaker 2010 SELA Convention, Semi-Finalist 2010 Strauss Foundation Scholarship Program\nComputer Skills: Competency: MATLAB, MySQL/PHP, JavaScript, Objective-C, Git Proficiency: Adobe Creative Suite, Excel\n(highly advanced), PowerPoint, HTML5/CSS3\nLanguages: Fluent English, Advanced Spanish\n\x0c"
print(re.findall(p, test_str))

IDEONE 演示