python爬取房源，可以运行，但是每次只爬出一条是什么原因？

from lxml import etree
import requests
import csv
import time
 
 
def spider():
    headers = {
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.81 Safari/537.36 SE 2.X MetaSr 1.0'
    }
 
    
    pre_url = 'https://hefei.qfang.com/rent/f'
    for x in range(1, 13):
        html = requests.get(pre_url + str(x), headers=headers)
        time.sleep(2)  # 在每一次GET后，等待2秒
        selector = etree.HTML(html.text)
    # 先获取房源列表
    house_list = selector.xpath("//*[@id='cycleListings']/ul/li")
    for house in house_list:
        xiaoqu = house.xpath("div[2]/div[3]/div/a/text()")[0]
        huxing = house.xpath("div[2]/div[2]/p[1]/text()")[0]
        area = house.xpath("div[2]/div[2]/p[2]/text()")[0]
        month_price = house.xpath("div[3]/p/span[1]/text()")[0]
        
    item = [xiaoqu, huxing, area, month_price]
    data_writer(item)
    print('正在抓取', xiaoqu)
 
 
def data_writer(item):
    with open('qfang_chuzufang.csv','a+',encoding='utf-8',newline='')as csvfile:
        writer = csv.writer(csvfile)
        writer.writerow(item)
 
 
if __name__ == '__main__':
    spider()
 
 

已修改，爬到不止一页，就是你信息提取包括了一些其他符号，自己再处理一下就好了

from lxml import etree
import requests
import csv
import time


def spider():
    print("stater")
    headers = {
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.81 Safari/537.36 SE 2.X MetaSr 1.0'
    }

    pre_url = 'https://hefei.qfang.com/rent/f'
    for x in range(1, 13):
        html = requests.get(pre_url + str(x), headers=headers)
        time.sleep(2)  # 在每一次GET后，等待2秒
        selector = etree.HTML(html.text)
    # 先获取房源列表
        house_list = selector.xpath("//*[@id='cycleListings']/ul/li")
        for house in house_list:
            xiaoqu = house.xpath("div[2]/div[3]/div/a/text()")[0]
            huxing = house.xpath("div[2]/div[2]/p[1]/text()")[0]
            area = house.xpath("div[2]/div[2]/p[2]/text()")[0]
            month_price = house.xpath("div[3]/p/span[1]/text()")[0]

            item = [xiaoqu, huxing, area, month_price]
            print(item)
            # data_writer(item)
            print('正在抓取', xiaoqu)


# def data_writer(item):
#     with open('qfang_chuzufang.csv', 'a+', encoding='utf-8', newline='') as csvfile:
#         writer = csv.writer(csvfile)
#         writer.writerow(item)


if __name__ == '__main__':
    spider()

这三行往右缩进就行了
item = [xiaoqu, huxing, area, month_price]
data_writer(item)
print('正在抓取', xiaoqu

你这只爬了一页内容，你要分析那个负责页码的那个参数例如page之类的，然后仿造这个参数，不断for循环请求每一页呀。
翻页爬取一个 for 循环不就行，它的 URL ，前面的路径都是一样的，只不过是有一个参数在控制页码，例如 page 之类的，你每次只不过需要构造这个参数，用 range 生成就行， for i in range (1,51)，像这样是不是已经构造出了一道50?，这就是一到五十页呀，你把构造出来的这个i加到循环里面加到
那个 url 里的 page 参数后不就行了，然后 request 不就好了。