# Copyright (c) Microsoft Corporation. All rights reserved.
# Licensed under the MIT License.

from botbuilder.core import ActivityHandler, TurnContext
from botbuilder.schema import ChannelAccount


class MyBot(ActivityHandler):
    async def on_members_added_activity(
        self,
        members_added: ChannelAccount,
        turn_context: TurnContext
    ):
        for member_added in members_added:
            if member_added.id != turn_context.activity.recipient.id:
                await turn_context.send_activity("Hello world!")