如何使用Python读取Microsoft Teams聊天内容？寻求技术实现方向

Great question—monitoring Teams chats for assignment reminders is a super practical use case, and while accessing Teams data programmatically isn't totally trivial, there are solid technical paths you can follow. Here's a breakdown of your options, ordered by reliability:

This is the supported, stable way to interact with Teams data. Here's how to get started:

• Register an Azure AD App: Go to the Azure Portal, create a new app registration, and assign it the right permissions. For reading your own direct chats, use the Chat.Read delegated permission. If you need to monitor team channels, use ChannelMessage.Read.All (note: this might require your organization's admin approval if using application permissions).
• Authenticate & Fetch Messages: You can use the Microsoft Graph Python SDK (msgraph-sdk) or plain requests to call the API. Here's a quick example with requests:

  import requests
  
  # Replace these with your actual access token and target chat ID
  access_token = "YOUR_VALID_ACCESS_TOKEN"
  target_chat_id = "CHAT_ID_FROM_TEAMS"
  
  # Endpoint to get messages from the chat
  api_url = f"https://graph.microsoft.com/v1.0/me/chats/{target_chat_id}/messages"
  headers = {"Authorization": f"Bearer {access_token}"}
  
  response = requests.get(api_url, headers=headers)
  chat_messages = response.json()
  
  # Check each message for assignment keywords
  for msg in chat_messages.get("value", []):
      message_content = msg["body"]["content"].lower()
      if "assignment" in message_content or "homework" in message_content:
          print(f"Alert: New assignment found!\n{msg['body']['content']}")
  

• Real-Time Monitoring: Instead of polling the API every few minutes (which can hit rate limits), set up a Graph API subscription to get webhook notifications whenever new messages are added. This gives you instant alerts without repeated API calls.

If you only need to watch a specific class channel (not direct messages), an outgoing webhook is a simpler alternative:

• In Teams, go to your target channel, add an outgoing webhook, and point it to a public endpoint hosted by your Python script (using Flask or FastAPI, for example).
• Whenever a new message is posted in the channel, Teams will send an HTTP POST request to your endpoint with the message details.
• Your script can parse the incoming request, check for assignment-related keywords, and trigger a reminder (like a desktop notification).

If you can't use the official APIs (e.g., no admin approval for app permissions), you can automate the Teams desktop/web app with tools like pyautogui or selenium:

• Use pyautogui to locate the Teams window, navigate to your target chat, and scrape text from the chat interface.
• Or use selenium to control the Teams web app, log in, and extract message elements from the DOM.
• Important: This approach is fragile—any UI update to Teams will break your script, and it requires the app to stay open. Only use this if the other options aren't feasible.

内容的提问来源于stack exchange，提问作者Galviger