如何使用 Python 代码修改 JSON 文件中的字段并拷贝相关文件？

import osimport jsonimport shutildef modify_json_copy_files(old_json_path, new_json_path):    # 获取所有 json 文件    json_files = []    for root, dirs, files in os.walk(old_json_path):        for file_name in files:            if file_name.endswith('.json'):                json_files.append(os.path.join(root, file_name))    # 遍历每个 json 文件    for json_file in json_files:        # 读入 json 数据并修改字段        with open(json_file, 'r', encoding='utf-8') as f:            json_data = f.read()            if bool(json_data):                json_data_str = eval(json_data)                if isinstance(json_data_str, dict):                    json_data_str.update({"filename": json_file.split("\")[-2].replace(".dav", ".avi")})        json_data_str = json_data        # 写入修改后的 json 数据        new_json_file = os.path.join(new_json_path, os.path.basename(json_file))        with open(new_json_file, 'w', encoding='utf-8') as f:            json.dump(json_data_str, f, indent=4, ensure_ascii=false)        # 拷贝其他类型文件        dir_name = json_file.split("\")[-2].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)        for file_name in os.listdir(json_file.rsplit('\', 1)[0]):            if file_name != os.path.basename(json_file) and (file_name.endswith('.jpg') or file_name.endswith('.avi')):                old_file_path = os.path.join(json_file.rsplit('\', 1)[0], file_name)                new_file_path = os.path.join(new_dir_name, file_name)                shutil.copy(old_file_path, new_file_path)# 设置旧 json 路径和新 json 路径old_json_path = 'c:\path\to\old\json'new_json_path = 'c:\path\to\new\modified\json'modify_json_copy_files(old_json_path, new_json_path)

if bool(json_data):    json_data_str = eval(json_data)    if isinstance(json_data_str, dict):        json_data_str.update({"fileName": json_file.split("\")[-2].replace(".dav", ".avi")})json_data_str = json_data