import re s = "@@0001 words 83 words, 90, words, 8989! @@0002 words, 98 words; words. @@0003 words 30 words ...." print( re.sub(r'(@@\d+)', r'\n\1 | ', s).lstrip() )
Standard input is empty
@@0001 | words 83 words, 90, words, 8989! @@0002 | words, 98 words; words. @@0003 | words 30 words ....