types-channels

import asyncio from channels.generic.websocket import AsyncWebsocketConsumer from typing import Dict, Any, Union # Example consumer, save as `my_consumer.py` class MyConsumer(AsyncWebsocketConsumer): async def connect(self) -> None: await self.accept() print("WebSocket connected!") async def disconnect(self, close_code: int) -> None: print(f"WebSocket disconnected with code: {close_code}") async def receive(self, text_data: Union[str, None] = None, bytes_data: Union[bytes, None] = None) -> None: if text_data: response: Dict[str, Any] = {"message": f"Received: {text_data}"} await self.send(text_data=str(response)) print("Received data.") async def main(): # This part is just to make the example runnable for demonstration of type hints. # In a real application, connect and disconnect would be called by the ASGI server. consumer = MyConsumer() await consumer.connect() # Simulate a received message for type checking await consumer.receive(text_data="Hello from client!") await consumer.disconnect(1000) if __name__ == '__main__': asyncio.run(main())