熊猫只将最后一个bs4元素打印到CSV文件中

如何解决熊猫只将最后一个bs4元素打印到CSV文件中

我正在从zoopla.co.uk抓取房屋数据

数据框似乎可以正确打印，但是pandas仅将最后一个元素（最后一个房子）打印到csv文件中。

我还尝试将每个对象转换为pd.DataFrame（{}）语句中的列表，但这并没有更改csv输出。

代码

import requests
from bs4 import BeautifulSoup
import re
import pandas as pd

my_url = 'https://www.zoopla.co.uk/for-sale/property/b23/?page_size=100&q=B23&radius=0&results_sort=newest_listings&search_source=refine'
res = requests.get(my_url)
soup = BeautifulSoup(res.text,"html.parser")
lis = soup.find("ul",class_="listing-results clearfix js-gtm-list").find_all("li",class_="srp clearfix")

for li in lis:
    bedrooms = li.find("span",class_="num-beds")
    bathrooms = li.find("span",class_="num-baths")

    price = li.find("a",class_="text-price")
    house_price = re.findall('\£(\d+)',str(price))

    style = li.find("h2",class_="listing-results-attr")
    house_type = re.findall('(?<=bed ).*(?= for)',str(style))

    distance = li.find("li",class_="clearfix")
    station_distance = re.findall('\d+\.?\d*',str(distance))

    if bedrooms:
        bedrooms = bedrooms.get_text(strip=True)
    if bathrooms:
        bathrooms = bathrooms.get_text(strip=True)
    if house_price:
        house_price = house_price
    if house_type:
        house_type = house_type
    if station_distance:
        station_distance = station_distance

    df = pd.DataFrame({'house_price': house_price,'house_type': house_type,'station_distance': station_distance,'bedrooms': bedrooms,'bathrooms': bathrooms})
    print(df)

    df.to_csv('zoopla.csv')

输出

house_price house_type station_distance bedrooms bathrooms
0          90       flat              0.2        1         1
  house_price      house_type station_distance bedrooms bathrooms
0         210  detached house              0.6        3      None
  house_price         house_type station_distance bedrooms bathrooms
0         160  end terrace house              0.7        2         1
  house_price      house_type station_distance bedrooms bathrooms
0         325  detached house              1.2        4         1
  house_price           house_type station_distance bedrooms bathrooms
0         195  semi-detached house              1.1        3         1
  house_price      house_type station_distance bedrooms bathrooms
0          24  terraced house              0.9        3      None
  house_price house_type station_distance bedrooms bathrooms
0         115       flat              0.2        2         1

Excel输出-熊猫仅输出网站上的最后一个元素（房屋）

解决方法

您每次迭代都覆盖数据框。

使用：

result = []
for li in lis:
    ...

    result.append({'house_price': house_price,'house_type': house_type,'station_distance': station_distance,'bedrooms': bedrooms,'bathrooms': bathrooms})
    
df = pd.DataFrame(result)
print(df)

df.to_csv('zoopla.csv')