谁能帮我看看我这段程序里面的问题，关于python的小问题

import requests from bs4 import BeautifulSoup

for i in range(0,250,1): url = 'https://movie.douban.com/top250?start='+str(i)+'0&filter=' headers = {'User-Agent':'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.114 Safari/537.36'}

res_films = requests.get(url,headers = headers)
bs_films = BeautifulSoup(res_films.text,'html.parser')

films = bs_films.find_all('div',class_ = 'item')
for film in films:
    num = film.find(class_ = 'pic')
    name = film.find(class_='title')
    comment = film.find('p',class_='quote')
    score = film.find('span',class_='rating_num')
    link = film.find('a')
    print(num.text.strip(),name.text.strip(),comment.text.strip(),score.text.strip(),link['href'])

问题：为什么提取电影信息只能到172，编号173以后没有爬取下来，还有就是为什么循环爬取结果里会有很多重复，谢谢

因为173没有内容介绍

comment = film.find('p',class_='quote') 没有获取成功

import requests
from bs4 import BeautifulSoup

for i in range(0,250,1):
    url = 'https://movie.douban.com/top250?start='+str(i)+'0&filter='
    headers = {'User-Agent':'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.114 Safari/537.36'}
    res_films = requests.get(url,headers = headers)
    bs_films = BeautifulSoup(res_films.text,'html.parser')
    films = bs_films.find_all('div',class_ = 'item')
    for film in films:
        num = film.find(class_ = 'pic')
        name = film.find(class_='title')
        comment = film.find('p',class_='quote')
        score = film.find('span',class_='rating_num')
        link = film.find('a')
        commentText = comment.text.strip() if comment else "（无）"
        print(num.text.strip(),name.text.strip(),commentText,score.text.strip(),link['href'])