Why does this error pop up?

Question

Python

RuntimeError: There is no current event loop in thread 'WorkerThread1'.

here is my code:

import telebot, sqlite3, requests, time
from telebot import types
from datetime import datetime
# -*- coding: utf-8 -*-
from telethon import TelegramClient, events, sync
from telethon.tl.types import InputPhoneContact
from telethon import functions, types
import random, string

client = TelegramClient()
client.connect()
if not client.is_user_authorized():
    client.send_code_request('')
    client.sign_in('+1214', input('Enter code: '))

TOKEN = 
bot = telebot.TeleBot(TOKEN)

def sex(message):
    num = message.text
    randoma = random.choice(string.ascii_letters)
    randomb = random.choice(string.ascii_letters)
    contact = InputPhoneContact(client_id = 0, phone = num, first_name=randoma, last_name=randomb)
    contacts = client(functions.contacts.ImportContactsRequest([contact]))
    username = contacts.to_dict()['users'][0]['username']
    bot.send_message(message.chat.id, f'@{username}')

@bot.message_handler(content_types=['text'])
def referer(message):
        a = bot.send_message(message.chat.id, '''отправь мне номер: ''')
        bot.register_next_step_handler(a, sex)

while True:
    try:
        bot.infinity_polling(interval=0)
    except:
        bot.infinity_polling(interval=0)

Answer 1

From documentation :

The default policy defines context as the current thread, and manages
an event loop per thread that interacts with asyncio. If the current
thread doesn't already have an event loop associated with it, the
default policy's get_event_loop() method creates one when called from
the main thread, but raises RuntimeError otherwise.

That is, something in your code is trying to use asyncio on threads. I suspect that you did not show us the full code.