I got an error with websocket and json (Discord Gateway)

Question

when i finished the code there was MULTIPLE ERRORS and i was personally confused.

import os
import websocket #pip install websocket-client
import json
import time
import threading

def send_json_req(ws, request):
    ws.send(json.dumps(request))

def recieve_json_response(ws):
    response = ws.recv()
    if response:
        return json.loads(response)

def heartbeat(interval, ws):
    print('Heartbeat Began')
    while True:
        time.sleep(interval)
        heartbeatJSON = {
            "op": 1,
            "d": "null"
        }
        send_json_req(ws, heartbeatJSON)
        print("Heartbeat sent")

ws = websocket.WebSocket("wss://gateway.discord.gg/?v=6&encoding=json")
event = recieve_json_response(ws)

heartbeat_interval = event['d']['heartbear_interval'] / 1000
threading._start_new_thread(heartbeat, (heartbeat_interval, ws))

authtoken = Discord_Token
payload = {
    'op':1,
    "d": {
        "token": authtoken,
        "properties": {
            "$os": "linux",
            "$browser": "chrome",
            "$device": "pc"
        }
    }
}
send_json_req(ws, payload)

while True:
    event = recieve_json_response(ws)

    try:
        print(f"{event['d']['author']['username']}: {event['d']['content']}")
        op_code = event('op')
        if op_code == 11:
            print('Heartbeat received')
    except:
        pass

Theres been a bunch of errors about the websocket directory? and idk what it means. Can someone help?? and the error is kinda confusing me a lot i dont really know what to do?

the please add some details is annoying me also im new to stackoverflow.