How to solve the error ImportError: cannot import name 'AsyncWebsocketConsumer'?

Question

I am using Python 3.6 ,Django 1.11 and chennels=2. I am following this tutorial and it works fine till tutorial part 2: http://channels.readthedocs.io/en/stable/tutorial/part_2.html

When i moved to tutorial part 3 and changed ChatConsumer file accordingly: http://channels.readthedocs.io/en/stable/tutorial/part_3.html

I am facing this issue

ImportError: cannot import name 'AsyncWebsocketConsumer'

Consumer.py:

from channels.generic.websocket import AsyncWebsocketConsumer
import json

class ChatConsumer(AsyncWebsocketConsumer):
    async def connect(self):
        self.room_name = self.scope['url_route']['kwargs']['room_name']
        self.room_group_name = 'chat_%s' % self.room_name

        # Join room group
        await self.channel_layer.group_add(
            self.room_group_name,
            self.channel_name
        )

        await self.accept()

    async def disconnect(self, close_code):
        # Leave room group
        await self.channel_layer.group_discard(
            self.room_group_name,
            self.channel_name
        )

    # Receive message from WebSocket
    async def receive(self, text_data):
        text_data_json = json.loads(text_data)
        message = text_data_json['message']

        # Send message to room group
        await self.channel_layer.group_send(
            self.room_group_name,
            {
                'type': 'chat_message',
                'message': message
            }
        )

    # Receive message from room group
    async def chat_message(self, event):
        message = event['message']

        # Send message to WebSocket
        await self.send(text_data=json.dumps({
            'message': message
        }))

Error: Any kind of will be appreciated!

Answer 1

要将使用者功能更改为异步性质，您需要从channels.generic.websocket导入AsyncWebsocketConsumer

from channels.generic.websocket import AsyncWebsocketConsumer

Answer 2

更新至2.1版频道，此错误已解决！

pip install channels==2.1