find_str.py

def find_next_index(a_string:str, substring:str)->list:
    """
    return find all index of a substring in a_string in a list
    """
    raw_substring = r'\b{0}\b'.format(substring)
    matches = re.finditer(raw_substring, a_string)
    matches_positions = [match.start() for match in matches]
    return matches_positions