밑에 창에 네임에러가 나왔다는데 'db' 라는 이름을 찾을수 없다는데 똑같이 쳤는데 확인 부탁드립니다!

db.movies.insert_one(doc)

작성한 코드 및 에러 메세지

import requests

from bs4 import BeautifulSoup

from pymongo import MongoClient
import certifi
ca = certifi.where()


headers = {'User-Agent' : 'Mozilla/5.0 (Windows NT 10.0; Win64; x64)AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.86 Safari/537.36'}

data = requests.get('https://movie.naver.com/movie/sdb/rank/rmovie.naver?sel=pnt&date=20210829',headers=headers)

soup = BeautifulSoup(data.text, 'html.parser')

movies = soup.select('#old_content > table > tbody > tr')

for movie in movies:
    a = movie.select_one('td.title > div > a')
    if a is not None:
        title = a.text
        rank = movie.select_one('td:nth-child(1) > img')['alt']
        star = movie.select_one('td.point').text
        doc = {
           'title':title,
           'rank':rank,
           'star':star
        }
        db.movies.insert_one(doc)