大家好，我是天空之城，今天教大家利用python来爬取豆瓣电影并保存为表格文件。话不多说，上代码。

import requests,lxml
from lxml import etree
import csv

header = {
      'Referer': 'https://movie.douban.com/top250?start=1&filter=',
      'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; rv:46.0) Gecko/20100101 Firefox/46.0'}

url='https://movie.douban.com/top250?start={}&filter='

def getdata(url):
    response = requests.get(url,headers=header)
    response.encoding='utf-8'
    return response.text

def getitem(source):
    html=etree.HTML(source)
    filmlist=html.xpath('//div[@class="whol"]')
    list_all = []
    for film in filmlist:
        filmdict={}
        title=film.xpath('div[@class="hd"]/a/span[@class="title"][1]/text()')[0]
        link=film.xpath('div[@class="hd"]/a/@href')[0]
        pingfen=film.xpath('div[@class="bd"]/div[@class="star"]/span[@class="rating_num"]/text()')[0]
        #daoyan = film.xpath('div[@class="bd"]/p[@class=""]/text()')
        pinglun=film.xpath('div[@class="bd"]/p/span[@class="inq"]/text()')

        if pinglun:
            pinglun=pinglun[0]
        else:
            pinglun=''

        filmdict['title']=title
        filmdict['link'] =link
        filmdict['pingfen'] =pingfen
        filmdict['pinglun'] =pinglun
        list_all.append(filmdict)
        #print(list_all)
    return list_all
        #print(title + '\n' + link + '\n' + pingfen + '\n' + pinglun)
        #print(title,link,pingfen,pinglun)
        #list_all.append(title+'\n'+link+'\n'+pingfen+'\n'+pinglun)


def writedata(list_all):
    with open('douban2.csv','w',newline="",encoding='utf-8') as file:

        writer=csv.DictWriter(file,fieldnames=['title', 'link', 'pingfen', 'pinglun'])
        writer.writeheader()
        for each in list_all:
            writer.writerow(each)

if __name__ == '__main__':
    list_all=[]
    for i in range(10):
        pagelink=url.format(i*25)
        source=getdata(pagelink)
        list_all+=getitem(source)
    writedata(list_all)
    print(list_all)