Как сохранить изображение из строки пользователя с помощью flask python

Question

linebot использует Flask python мой код >>https://drive.google.com/file/d/1NxrjkcefeJ2eazCmMydKT3mbuLn0ecIJ/view?usp=sharing def saveImage(message_id):not working i dont know how to solving this problem

      def saveImage(message_id):
    line_bot_api = LineBotApi(Channel_access_token)
    message_content = line_bot_api.get_message_content(message_id)
    file_path = 'C:\\Users\\b6109868\\Desktop\\LineBot\\Project\\saveimg'
    with open(file_path, 'wb') as fd:
        for chunk in message_content.iter_content():
            fd.write(chunk)
    return 200

i dont know how to get image from line user and save image in python but i know i I have to use get-content by line deverloper url: https://developers.line.biz/en/reference/messaging-api/#get-content but I don't know where the code is.