正则表达式提取特定部分

Question

I have a string '(test)skip(test774)2;3(xx2324)' . The presence of the word 'skip' is necessary.

re.search('skip[(].+[)]', args[0]).group(0)

gives me 'skip(test774)' , but not 'test774' . I can could use slicing [5:-1] to get 'test774' , but it's too clumsy

What the easiest way to get only the value in brackets ('test774') using regular expressions?

Answer 1

To isolate the text you want, use a capturing group around the part of the regex that matches that text.

re.search('skip[(]([^)]+)[)]', args[0]).group(1)

The change I made is where you have .+ (any non-empty sequence of characters), I have ([^)]+) (a capturing group containing a non-empty sequence of characters other than ) ; this means this part of the match stops just before the first ) , rather than just before the last ) , as .+ would).

regex101.com demo and explanation