为什么我不能在 function 中使用 websocket

Question

When I try using websocket like this

ws = websocket.WebSocketApp(f"wss://fstream.binance.com/ws/{symbol}@aggTrade",on_message=on_message,on_close=on_close)
ws.run_forever()

it works fine but for some reason I want to use it like this

def func(symbol):
    ws = websocket.WebSocketApp(f"wss://fstream.binance.com/ws/{symbol}@aggTrade",on_message=on_message,on_close=on_close)
    ws.run_forever()
func("btcusdt")

but it's not working why can't I use websocket in func how can I do that

Answer 1

This (minor change to OP's code due to SSL issue) works perfectly on Python 3.9.9

import websocket
import ssl


def on_msg(_, msg):
    print(msg)


def on_err(_, err):
    print(err)


def func(symbol):
    ws = websocket.WebSocketApp(
        f"wss://fstream.binance.com/ws/{symbol}@aggTrade", on_message=on_msg, on_error=on_err)
    ws.run_forever(sslopt={"cert_reqs": ssl.CERT_NONE})


if __name__ == '__main__':
    func('btcusdt')