需要用到两大模块

• requests
• BeautifulSoup

requests

• 安装requests

pip install requests

• 导入requests

import requests

• 具体使用详见 https://fishc.com.cn/thread-95893-1-1.html

BeautifulSoup

• 安装BeautifulSoup

pip install BeautifulSoup  
或
pipenv install BeautifulSoup  

• 导入BeautifulSoup

import bs4
或
from bs4 import BeautifulSoup

• 具体使用
  https://fishc.com.cn/thread-95893-1-1.html

步入正题爬取信息

import requests
from bs4 import BeautifulSoup
def url_open(url):
    # 使用代理
    # proxies = {"http": "127.0.0.1:1080", "https": "127.0.0.1:1080"}
    headers = {'User-Agent':'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36'}
    res = requests.get(url,headers = headers)
    return res
def find_depth(res):
    soup = BeautifulSoup(res.text,'html.parser')
    depth= soup.find('span',class_ = 'next').previous_sibling.previous_sibling.text
    return int(depth)
def find_movies(res):
    soup = BeautifulSoup(res.text,'html.parser')
    # 电影名
    movies = []
    targets = soup.find_all('div',class_ = 'hd')
    for i in targets:
        movies.append(i.a.span.text)
    # 评分
    ranks = []
    targets = soup.find_all('span', class_='rating_num')
    for i in targets:
        ranks.append('评分：%s' % i.text)
    # 资料
    messages = []
    targets = soup.find_all('div', class_='bd')
    for i in targets:
        try:
            messages.append(i.p.text.split('\n')[1].strip()+i.p.text.split('\n')[2].strip())
        except:
            continue
    results = []
    length = len(movies)
    for i in range(length):
        results.append(movies[i]+ranks[i]+messages[i]+'\n')
    return results
def main():
    host = 'https://movie.douban.com/top250'
    res = url_open(host)
    depth = find_depth(res)
    result = []
    for i in range(depth):
        url = host + '?start='+str(25 * i)+'&filter='
        res = url_open(url)
        result.extend(find_movies(res))
    with open('250movies.txt','w',encoding= 'utf-8') as f:

        f.writelines(result)
if __name__ == '__main__':
    main()