如何在多个文件中增加Python中的数字

In file 1.html I will have $item_id = 1;
In file 2.html I will have $item_id = 2;
In file 3.html I will have $item_id = 3;
...
In file 2300.html I will have $item_id = 2300;

import os
import re

def read_text_from_file(file_path):
    """
    Aceasta functie returneaza continutul unui fisier.
    file_path: calea catre fisierul din care vrei sa citesti
    """
    with open(file_path, encoding='utf8') as f:
        text = f.read()
        return text


def write_to_file(text, file_path):
    """
    Aceasta functie scrie un text intr-un fisier.
    text: textul pe care vrei sa il scrii
    file_path: calea catre fisierul in care vrei sa scrii
    """
    with open(file_path, 'wb') as f:
        f.write(text.encode('utf8', 'ignore'))

def incrementare_fisiere_html(cale_folder_html):
    """
    Functia itereaza printr-un folder care contine fisiere html si adauga index-ul corespunzator in fiecare fisier
    """
    count = 0
    current_id = 1
    for f in os.listdir(cale_folder_html):
            if f.endswith('.html'):
                cale_fisier_html = cale_folder_html + "\\" + f
                html_text = read_text_from_file(cale_fisier_html)
                item_id_pattern = re.compile('\$item_id = (.*?);')
                item_id = re.findall(item_id_pattern, html_text)
                if len(item_id) > 0:
                    print("{} a fost modificat. ".format(f))
                    item_id = item_id[0]
                    html_text = html_text.replace(item_id, str(current_id))
                    current_id += 1
                    count += 1
                    write_to_file(html_text, cale_fisier_html)
                else:
                    # print("{} nu are $item_id.".format(f))
                    continue
            else:
                continue
    print("Numarul de fisiere modificate: ", count)

if __name__ == '__main__':
    # sa pui calea catre folderul cu fisiere
    incrementare_fisiere_html('e:\\Folder1')