Perfect question! Let's break down how to check if your Python Telegram Bot is an admin of a channel, using the channel ID you extract from a forwarded message. I'll cover implementations for both of the most widely used bot libraries: python-telegram-bot (version 20+, the latest stable) and pyTelegramBotAPI.

Step 1: Extract Channel ID from Forwarded Messages #

First, you need to pull the channel ID from the forwarded message sent to your bot. The exact property to access depends on which library you're using:

Example with python-telegram-bot v20 #

from telegram import Update
from telegram.ext import ApplicationBuilder, MessageHandler, filters, ContextTypes

async def handle_forwarded_msg(update: Update, context: ContextTypes.DEFAULT_TYPE):
    # Verify the message is forwarded from a channel
    if update.message.forward_origin and update.message.forward_origin.type == "channel":
        channel_id = update.message.forward_origin.chat.id
        print(f"Extracted Channel ID: {channel_id}")
        
        # Check admin status and reply to user
        is_admin = await check_bot_admin(context, channel_id)
        reply_text = "I'm an admin of this channel!" if is_admin else "I'm not an admin here (or haven't joined the channel yet)."
        await update.message.reply_text(reply_text)

# Initialize your bot
app = ApplicationBuilder().token("YOUR_BOT_TOKEN").build()
app.add_handler(MessageHandler(filters.FORWARDED, handle_forwarded_msg))
app.run_polling()

Example with pyTelegramBotAPI #

import telebot

bot = telebot.TeleBot("YOUR_BOT_TOKEN")

@bot.message_handler(func=lambda msg: msg.forward_from_chat is not None)
def handle_forwarded_msg(msg):
    channel_id = msg.forward_from_chat.id
    print(f"Extracted Channel ID: {channel_id}")
    
    # Check admin status and reply
    is_admin = check_bot_admin(bot, channel_id)
    reply_text = "I'm an admin of this channel!" if is_admin else "I'm not an admin here (or haven't joined the channel yet)."
    bot.reply_to(msg, reply_text)

bot.polling()

Step 2: Implement the Admin Check Function #

The core logic uses Telegram's get_chat_administrators API method to fetch all admins in the channel, then checks if your bot is in that list. You can also verify specific admin permissions if needed.

For python-telegram-bot v20 #

async def check_bot_admin(context: ContextTypes.DEFAULT_TYPE, channel_id: int) -> bool:
    try:
        # Get your bot's own user ID
        bot_user = await context.bot.get_me()
        bot_id = bot_user.id
        
        # Fetch all channel administrators
        admins = await context.bot.get_chat_administrators(channel_id)
        
        # Check if bot is in the admins list
        for admin in admins:
            if admin.user.id == bot_id:
                # Optional: Verify specific permissions (e.g., delete messages)
                # if admin.can_delete_messages:
                #     return True
                return True
        return False
    except Exception as e:
        # Errors here mean the bot isn't a member of the channel, or has no access
        print(f"Admin check error: {e}")
        return False

For pyTelegramBotAPI #

def check_bot_admin(bot: telebot.TeleBot, channel_id: int) -> bool:
    try:
        # Get your bot's own user ID
        bot_user = bot.get_me()
        bot_id = bot_user.id
        
        # Fetch all channel administrators
        admins = bot.get_chat_administrators(channel_id)
        
        # Check if bot is in the admins list
        for admin in admins:
            if admin.user.id == bot_id:
                # Optional: Verify specific permissions (e.g., post messages)
                # if admin.can_post_messages:
                #     return True
                return True
        return False
    except Exception as e:
        # Errors here mean the bot isn't a member of the channel, or has no access
        print(f"Admin check error: {e}")
        return False

Key Notes #

• Error Handling: If the bot hasn't joined the channel, calling get_chat_administrators will throw an exception (like ChatNotFound or Forbidden). We catch this and return False to indicate the bot isn't a member/admin.
• Specific Permissions: If you need to ensure the bot has certain admin rights (e.g., deleting messages, pinning posts), use the properties of the ChatMemberAdministrator object (like can_delete_messages or can_pin_messages).
• Channel ID Format: Channel IDs are always negative integers (e.g., -1001234567890), so make sure you're using the full numeric ID without any extra characters.

内容的提问来源于stack exchange，提问作者OuzKagan