IC418.02 https://www.insightcoder.com/418/split-string-in-python-while-keeping-delimiter

header_split.py

import re
import pprint

def header_split(text, header_pattern):
    """ Return chunks of text split by the header pattern.

    Keyword arguments:
    text -- Text that is desired to be split.
    header_pattern -- Regular expression pattern string that sufficiently
        describes the header of each chunk.

    """
    find_pattern = r'%s.*?(?=%s|$)' % (header_pattern, header_pattern)
    parts = re.findall(find_pattern, text, re.DOTALL)
    return parts
    
    
def main():
    with(open('data.txt')) as f:
        text = f.read()

        header_pattern = r'# Person \d+'
        parts = header_split(text, header_pattern)
        for part in parts:
            pprint.pprint(part)

if __name__ == '__main__':
    main()

output

'# Person 1\nName: Frodo\nDOB: 9/22/2968\nFavorite Food: Mushroom Pizza\n'
'# Person 2\nName: Samwise\nDOB: 4/6/2980\nFavorite Food: Lembas with Queso\n'
'# Person 3\nName: Gollum\nDOB: 1/1/2430\nFavorite Food: Fruit Rings Cereal'