Regular Expression: re.split behavior weird when have a sub pattern about cpython

[blhsing]

Works as intended. A capture group with a quantifier captures only the first occurrence of the enclosed pattern.

Try re.split(r'((?:\r|\n)+)', 'x\n\n\ny') instead, which returns ['x', '\n\n\n', 'y'].

[serhiy-storchaka]

Concur with @blhsing. You can use re.finditer() to see in details what was found.

For future, please use text instead of pictures for your examples. It is difficult to copy the code from a picture, it is also bad for visually impaired people.

[pochmann3]

A capture group with a quantifier captures only the first occurrence of the enclosed pattern.

Don't you mean the last occurrence? re.split(r'(\r|\n)+', 'x\n\n\ry') returns ['x', '\r', 'y'].

[blhsing]

A capture group with a quantifier captures only the first occurrence of the enclosed pattern.

Don't you mean the last occurrence? re.split(r'(\r|\n)+', 'x\n\n\ry') returns ['x', '\r', 'y'].

Ah yes my bad. Thanks for the correction!

[WiC-htao]

Concur with @blhsing. You can use re.finditer() to see in details what was found.

For future, please use text instead of pictures for your examples. It is difficult to copy the code from a picture, it is also bad for visually impaired people.

Sorry for using pictures. I am working on a rdp, which is not allowed to copy. And I don't have a local dev env. But I will try my best in the future.