How to call a async function contained in a class?
Finally I could find the right way to do it (special thanks to @dirn)
#!/usr/bin/env python3import sys, jsonimport asynciofrom websockets import connectclass EchoWebsocket: async def __aenter__(self): self._conn = connect('wss://ws.binaryws.com/websockets/v3') self.websocket = await self._conn.__aenter__() return self async def __aexit__(self, *args, **kwargs): await self._conn.__aexit__(*args, **kwargs) async def send(self, message): await self.websocket.send(message) async def receive(self): return await self.websocket.recv()class mtest: def __init__(self): self.wws = EchoWebsocket() self.loop = asyncio.get_event_loop() def get_ticks(self): return self.loop.run_until_complete(self.__async__get_ticks()) async def __async__get_ticks(self): async with self.wws as echo: await echo.send(json.dumps({'ticks_history': 'R_50', 'end': 'latest', 'count': 1})) return await echo.receive()
And this in main.py:
from testws import *a = mtest()foo = a.get_ticks()print (foo)print ("async works like a charm!")foo = a.get_ticks()print (foo)
This is the output:
root@ubupc1:/home/dinocob# python3 test.py{"count": 1, "end": "latest", "ticks_history": "R_50"}async works like a charm!{"count": 1, "end": "latest", "ticks_history": "R_50"}
Any tip to improve it is welcomed! ;)
Your question and answer are great!They helped me a lot!
Based on your code I was able to create the following class,better matching my need:
import asynciofrom websockets import connectclass TestClient: def __init__(self, URL): self.URL = URL self.conn = None self.loop = asyncio.get_event_loop() async def send(self, message): if self.conn == None: self.conn = await connect(self.URL) await self.conn.send(message) async def receive(self): return await self.conn.recv() def ping(self): return self.loop.run_until_complete(self._ping()) async def _ping(self): await self.send("Hello World") return await self.receive()test = TestClient("wss://echo.websocket.org")print(test.ping())