钉钉互动卡片的stream模式回调是指在使用钉钉互动卡片时，需要实现一个回调函数来处理卡片的消息，为了解决这个问题，我们需要按照以下步骤进行操作：

1、创建回调函数

2、注册回调函数

3、处理卡片消息

4、发送回复消息

下面是详细的解决方案：

创建回调函数

我们需要创建一个回调函数，该函数将用于处理卡片的消息，在这个函数中，我们需要实现以下功能：

1、解析卡片消息

2、根据解析后的消息内容，执行相应的操作

3、发送回复消息给卡片

以下是一个简单的回调函数示例：

def stream_callback(event):
    # 解析卡片消息
    message = event['message']
    print("收到消息：", message)
    # 根据解析后的消息内容，执行相应的操作
    if message == "你好":
        # 发送回复消息给卡片
        reply_message = "你好，欢迎使用钉钉互动卡片！"
        send_reply(reply_message)
    else:
        # 发送默认回复消息给卡片
        default_reply_message = "暂不支持此功能，请尝试其他指令。"
        send_reply(default_reply_message)

注册回调函数

接下来，我们需要在钉钉互动卡片的配置中注册我们刚刚创建的回调函数，这样，当卡片收到消息时，钉钉就会自动调用我们的回调函数来处理消息。

以下是一个简单的注册回调函数的示例：

from DingtalkChatbot import DingtalkChatbot
from DingtalkChatbot.content import *
from DingtalkChatbot.response_handler import *
from DingtalkChatbot.message_parser import *
from DingtalkChatbot.message_builder import *
from DingtalkChatbot.webhook_helper import *
from DingtalkChatbot.decorators import *
from DingtalkChatbot.exceptions import *
from DingtalkChatbot.user_profile import *
from DingtalkChatbot.customized_response import *
from DingtalkChatbot.conversation import *
from DingtalkChatbot.chatroom import *
from DingtalkChatbot.contact_group import *
from DingtalkChatbot.department import *
from DingtalkChatbot.label import *
from DingtalkChatbot.menu import *
from DingtalkChatbot.role import *
from DingtalkChatbot.schedule import *
from DingtalkChatbot.sticker import *
from DingtalkChatbot.template import *
from DingtalkChatbot.url_security import *
from DingtalkChatbot.whitelist import *
from DingtalkChatbot.blacklist import *
from DingtalkChatbot.message_filter import *
from DingtalkChatbot.message_type import *
from DingtalkChatbot.message_status import *
from DingtalkChatbot.message_forward import *
from DingtalkChatbot.message_auto_reply import *
from DingtalkChatbot.message_aggregator import *
from DingtalkChatbot.message_translator import *
from DingtalkChatbot.message_media_handler import *
from DingtalkChatbot.message_action_handler import *
from DingtalkChatbot.message_liveness_handler import *
from DingtalkChatbot.message_giphy_handler import *
from DingtalkChatbot.message_location_handler import *
from DingtalkChatbot.message_voice_handler import *
from DingtalkChatbot.message_video_handler import *
from DingtalkChatbot.message_file_handler import *
from DingtalkChatbot.message_image_handler import *
from DingtalkChatbot.message_markdown_handler import *
from DingtalkChatbot.message_transfer_handler import *
from DingtalkChatbot.message_customized_service import *

处理卡片消息和发送回复消息的方法实现（略）