웹스크래핑결과 저장하기에서 MongoDB에 movies에 넣기가 안됩니다. 

작성한 코드 및 에러 메세지

import requests
from bs4 import BeautifulSoup

from pymongo import MongoClient
client = MongoClient('mongodb+srv://0710beach:sparta@cluster0.zhf3zqr.mongodb.net/Cluster0?retryWrites=true&w=majority')
db = client.dbsparta


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)

hello.py 파일 코드입니다.

실행시 아래 뜨는 내용 입니다.