silent hunter 3 append menu item

appendmenu.py

import configparser
import os

def replace_second_occurrence(_text, _old, _new):
    first_index = _text.find(_old)
    if first_index != -1:  # If the substring exists
        second_index = _text.find(_old, first_index + 1)
        if second_index != -1:  # If a second occurrence exists
            # Replace the second occurrence
            return _text[:second_index] + _text[second_index:].replace(_old, _new, 1)
    return _text


if __name__ == '__main__':
    with open('menu_1024_768.ini') as f:
        # use regexp to find each line starting with [G3F I and ending with ]
        import re
        content = f.read()
        matches = re.findall(r'\[G3F I.*\]', content)
        print(len(matches))
        print(matches)

        replaced = 0
        for i, match in enumerate(matches):
            new = f'[G3F I{i+2}]'

            # first occurence of the match
            if replaced == 0:
                content = content.replace(match, new)
            else:
                # replace second occurence
                content = replace_second_occurrence(content, match, new)
            replaced += 1
        # save the new content to a new file
        with open('menu_1024_768_new.ini', 'w') as f:
            f.write(content)