这个报错是为什么，要怎么改呀

Question

# -*- codeing = utf-8 -*-
#豆瓣电影前250信息,写入csv/txt文件
import requests, csv, re
from lxml import etree
from bs4 import BeautifulSoup as bs
import urllib
from urllib import request
k = 0
n = 1
movieData250 = []

#读取每一个网页25个电影信息
def info25():
    movieData = []
    for i in range(0,25):
        name = movie[i].find('span',class_="title").string#获得影片名称
        score = movie[i].find('span',class_="rating_num").string#获得影片评分
        num = movie[i].find('div',class_="star").find_all('span')[-1].string.strip('人评价')#获得影片评价人数
        quote = movie[i].find('span',class_="inq")#获得影片短评
        if quote is None:
            quote = "暂无"
        else:
            quote = quote.string
        #movieData[i] = [i+1,name,score,num,quote]
        movieData.append([i+1+k,name,score,num,quote])
    #print(movieData)
    return movieData
    #movieData250 = movieData250 + movieData

while(k == 0):
    h="https://movie.douban.com/top250"
    #设置浏览器代理,它是一个字典
    headers = {
        'User-Agent':'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.164 Safari/537.36'
    }
    request = urllib.request.Request(h, headers=headers)
    resp = urllib.request.urlopen(request)
    html_data = resp.read().decode('utf-8')
    soup = bs(html_data,'lxml')
    #print(soup.prettify())
    #movieList=soup.find('ol')#寻找第一个ol标签，得到所有电影
    #movieList=soup.find('ol',class_="grid_view")#以下两种方法均可
    movieList = soup.find('ol',attrs={'class':"grid_view"})
    movie = movieList.find_all('li')#获取每一个li（每个li是一个电影），以数组方式
    movieData250 +=info25()
    k += 25

while(k<250):

    h = "https://movie.douban.com/top250?start=" + str(k) + "&filter="
    #设置浏览器代理,它是一个字典
    headers = {
        'User-Agent':'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.164 Safari/537.36'
    }
    request = urllib.request.Request(h, headers=headers)
    resp = urllib.request.urlopen(request)
    html_data=resp.read().decode('utf-8')
    soup=bs(html_data,'lxml')
    #print(soup.prettify())
    #movieList=soup.find('ol')#寻找第一个ol标签，得到所有电影
    #movieList=soup.find('ol',class_="grid_view")#以下两种方法均可
    movieList=soup.find('ol',attrs={'class':"grid_view"})
    movie=movieList.find_all('li')#获取每一个li（每个li是一个电影），以数组方式
    movieData250 += info25()
    k+=25
    
#print(movieData250)

#将数组movieData250写入文件txt
import codecs
s ="—————————豆瓣电影top250——————————\r\n"
f = codecs.open("豆瓣电影top250.txt",'w','utf-8')
f.write(s)

for i in movieData250:
    f.write(str(i)+'\r\n')  #\r\n为换行符
f.close()

Answer 1

movieList = soup.find('ol',attrs={'class':"grid_view"})，这一行没有得到内容，movieList 为空，可能是对网页的解析有问题吧