如何使用 Python 代码修改 JSON 文件的指定字段，并将其与文件夹内的其他文件复制到新的路径？

import osimport jsonimport shutildef get_json_data(old_json_path):    result = []    for root, dirs, files in os.walk(old_json_path):        for file_name in files:            if file_name.endswith('.json'):                old_json_file_path = os.path.join(root, file_name)                result.append(old_json_file_path)    return resultdef get_dir_name(dir_name):    dir_name_result = []    for root, dirs, files in os.walk(dir_name):        for dir in dirs:            dirpath = os.path.join(root, dir)            dir_name_result.append(dirpath)    return dir_name_resultdef read_json(filepath):    with open(filepath, 'r', encoding='utf-8') as f:        json_data = f.read()        json_data_str = eval(json_data)        json_data_str.update({"fileName": filepath.split("\")[-2].replace(".dav", ".avi")})    return json_data_strdef write_json(filepath, newdata):    with open(filepath, 'w', encoding='utf-8') as r:        json.dump(newdata, r, indent=4, ensure_ascii=False)def copy_other_files(old_json_path, new_json_path):    for root, dirs, files in os.walk(old_json_path):        for file_name in files:            if not file_name.endswith('.json'):                old_json_filepath = os.path.join(root, file_name)                new_dir_name = os.path.join(new_json_path, root.split("\")[-1])                if not os.path.exists(new_dir_name):                    os.mkdir(new_dir_name)                shutil.copy(old_json_filepath, new_dir_name)if __name__ == "__main__":    old_json_path = r'D:ss'    new_json_path = r'D:json'    dirlist = get_dir_name(old_json_path)    for dir in dirlist:        json_file_list = get_json_data(dir)        for json_file in json_file_list:            dir_name = dir.split("\")[-1].replace(".dav", ".avi")            new_dir_name = os.path.join(new_json_path, dir_name)            if not os.path.exists(new_dir_name):                os.mkdir(new_dir_name)            shutil.copy(json_file, new_dir_name)            newdata = read_json(new_dir_name + "\" + os.path.basename(json_file))            write_json(new_dir_name + "\" + os.path.basename(json_file), newdata)        copy_other_files(dir, new_json_path)