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python - Getting no data from the server when scraping a site

问题描述

I have extracted the items from a particular website and now want to write them to an .xls file.

I expected a full excel sheet with the headings and rows of information, but get a sheet with only the headings. 

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

res = requests.get('https://www.raywhite.com/contact/?type=People&target=people&suburb=Sydney%2C+NSW+2000&radius=50%27%27&firstname=&lastname=&_so=contact')
soup = bs(res.content, 'lxml')

names=[]
positions=[]
phone=[]
emails=[]
links=[]

nlist = soup.find_all('li', class_='agent-name')
plist= soup.find_all('li',class_='agent-role')
phlist = soup.find_all('li', class_='agent-officenum')
elist = soup.find_all('a',class_='val withicon')

for n1 in nlist:
    names.append(n1.text)
    links.append(n1.get('href'))
for p1 in plist:
    positions.append(p1.text)
for ph1 in phlist:
    phone.append(ph1.text)
for e1 in elist:
    emails.append(e1.get('href'))


df = pd.DataFrame(list(zip(names,positions,phone,emails,links)),columns=['Names','Position','Phone','Email','Link'])
df.to_excel(r'C:\Users\laptop\Desktop\RayWhite.xls', sheet_name='MyData2', index = False, header=True)

This is what the resulting DataFrame looks like:

enter image description here

标签： pythonweb-scrapingbeautifulsoup

解决方案

例如，我尝试打印您的汤调用的结果，nlist = soup.find_all('li', class_='agent-name')并且正在返回空数组。汤函数没有找到任何数据。

进一步看，soup 请求是空的：

soup = bs(res.content, 'lxml')
print(soup)

给出：

<html>
<head><title>429 Too Many Requests</title></head>
<body bgcolor="white">
<center><h1>429 Too Many Requests</h1></center>
<hr/><center>nginx</center>
</body>
</html>

看起来该网站将您检测为机器人并且不允许您抓取。您可以按照此处的答案假装自己是网络浏览器：Web scraping with Python using BeautifulSoup 429 error

更新：

向请求中添加用户代理可以解决问题：

res = requests.get('https://www.raywhite.com/contact/?type=People&target=people&suburb=Sydney%2C+NSW+2000&radius=50%27%27&firstname=&lastname=&_so=contact', headers = {'User-agent': 'Super Bot 9000'})

您现在可以获得所需的输出。

在此处输入图像描述

一些网站拒绝没有用户代理的请求，而且这个网站似乎这样做了。添加用户代理使您的请求看起来更正常，因此站点允许它通过。这个或任何东西实际上没有任何标准，它因站点而异。

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