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This article will explain in detail how to achieve non-capture grouping of Python regular expressions. The editor thinks it is very practical, so I share it with you as a reference. I hope you can get something after reading this article.

1. Sometimes you don't want to refer to the matching result of the subexpression, and you don't want to capture the matching result, just match the parentheses as a whole.

2. Non-capture grouping can be used and non-capture grouping can be realized by using? at the beginning of the group.

Example

Import re s = 'img1.jpg,img2.jpg,img3.bmp' # capture packet p = r'\ w + (\ .jpg) 'mlist = re.findall (p, s) ① print (mlist) # non-capture packet p = r'\ w + (?:\ .jpg) 'mlist = re.findall (p, s) ② packet (mlist)

Output

['.jpg', '.jpg'] ['img1.jpg',' img2.jpg'] this is the end of the article on "how to implement non-capture grouping of Python regular expressions". I hope the above content can be of some help to you so that you can learn more knowledge. if you think the article is good, please share it for more people to see.

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