为什么这个python代码只能抓取豆瓣top250最后一页的内容

import requests
import re
#爬取十个页面
url="https://movie.douban.com/top250?start={}"
for i in range(10):
    start = i * 25
    a = url.format(start)
    headers={"user-agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.107 Safari/537.36 Edg/92.0.902.55"}
    r=requests.get(a,headers=headers)
    b=r.text
# 解析网页
obj=re.compile(r'<li>.*?<div class="item">.*?<span class="title">(?P<name>.*?)</span>',re.S)
result=obj.finditer(b)
for it in result:
     print(it.group("name"))

因为解析语句没有在for循环当中，下面这样就可以
有帮助，望采纳！

#!/usr/bin/python
# -*- coding: UTF-8 -*-
"""
@author: YangPC
@QQ:327844761
@微信公众号：ewbang
"""

import requests
import re

# 爬取十个页面
url = "https://movie.douban.com/top250?start={}"
for i in range(10):
    start = i * 25
    a = url.format(start)
    headers = {
        "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.107 Safari/537.36 Edg/92.0.902.55"}
    r = requests.get(a, headers=headers)
    b = r.text
    # 解析网页
    obj = re.compile(r'<li>.*?<div class="item">.*?<span class="title">(?P<name>.*?)</span>', re.S)
    result = obj.finditer(b)
    for it in result:
        print(it.group("name"))

你这个代码有问题吧，解析网页下面的代码块要和上面的for..range对齐

import requests
import re
#爬取十个页面
url="https://movie.douban.com/top250?start={}"
index=1
for i in range(10):
    start = i * 25
    a = url.format(start)
    headers={"user-agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.107 Safari/537.36 Edg/92.0.902.55"}
    r=requests.get(a,headers=headers)
    b=r.text
    # 解析网页
    obj=re.compile(r'<li>.*?<div class="item">.*?<span class="title">(?P<name>.*?)</span>',re.S)
    result=obj.finditer(b)
    for it in result:
       print(str(index)+"."+it.group("name"))
       index+=1