Yazılım | Programlama Python selenium kodlamada hatası

Traceback (most recent call last):
  File "C:\Users\User\Desktop\satan\destur.py", line 45, in <module>
    start()
  File "C:\Users\User\Desktop\satan\destur.py", line 23, in start
    soup = bs(wp_source, 'lxml')
NameError: name 'bs' is not defined

from selenium import webdriver
import requests
from bs4 import BeautifulSoup as bs4
from selenium.webdriver.common.keys import Keys
import time
import random

with open('messages.txt', 'r', encoding = 'utf-8') as messages:
 messagelist = list()
 text = messages.read()
 messagelist = text.split('\n')

def start():
    flag = False
    driver = webdriver.Chrome()
    driver.implicitly_wait(3)
    driver.get("https://www.instagram.com/")
    input('harf girin')
    message_area = driver.find_element_by_xpath('//*[@id="react-root"]/section/div/div[2]/div/div/div[2]/div[2]/div/div[2]/div/div/div[2]/textarea')
    while True:
        message_area.click()
        wp_source = driver.page_source
        soup = bs(wp_source, 'lxml')
        search = soup.find_all('div', {'class': ['e9_tN', 'JRTzd']})
        try:
            online = search[0].span.text
            print(online)
            if (online in ['Çevrimiçi', 'online']) and flag == False:
                print('dogru')
                msgToSend = messagelist[random.randit(0,len(messagelist)-1)]
                message_area.send_keys(msgToSend)
                message_area.send_keys(Keys.ENTER)
                flag = True
            elif online not in ['Çevrimiçi', 'online']:
                print('Şuanda çevrimiçi değil')
                flag = False
        except:
            print('Deneme-S')
            flag = False

        
        time.sleep(5)


start()