Python爬取百度搜索结果显示0

York_Zhou · 发表于 2024-7-21 11:48:15

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RT，不太懂为什么,基本思路就是直接开爬然后历遍，查了好几次F12也没看出来哪里有问题

import requests
from bs4 import BeautifulSoup
import pandas as pd
from time import sleep
import re
import random
import os
headers = {
"User-Agent": 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36',
"Connection":"keep-alive",
"Accept":"text/html,application/xhtml+xml,application/xml;q=8.9,image/avif.image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9",
"Accept-Encoding":"gzip,deflate",
"Host":"www.baidu.com",
"Cookie": "PSTM=1701005830; BIDUPSID=3847DE4A87F6BBA415E599085D83A664; BAIDUID=15153A5F7368E797908F9D80E823DA32:FG=1; BD_UPN=12314753; H_WISE_SIDS_BFESS=60360; MCITY=-360%3A; BDUSS=lrTlh4NTFOV2d2aVFDTWk0V20ySGNIZDJKT09QMFA0cHFyWkJ5QkxDZkZ1Y0ZtRVFBQUFBJCQAAAAAAAAAAAEAAAAPPSBIWW9ya19oYXBweQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAMUsmmbFLJpmQ2; BDUSS_BFESS=lrTlh4NTFOV2d2aVFDTWk0V20ySGNIZDJKT09QMFA0cHFyWkJ5QkxDZkZ1Y0ZtRVFBQUFBJCQAAAAAAAAAAAEAAAAPPSBIWW9ya19oYXBweQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAMUsmmbFLJpmQ2; H_PS_PSSID=60449_60359_60468_60440_60491_60501; H_WISE_SIDS=60449_60359_60468_60440_60491_60501; BAIDUID_BFESS=15153A5F7368E797908F9D80E823DA32:FG=1; BA_HECTOR=8lah8l8l05a12524ak20a5a1152kgl1j9ovqd1u; ZFY=wQT92WwXTov0LZiyOtHB0sWFAGuHJDp:BwvWiwRx018g:C; delPer=0; BD_CK_SAM=1; PSINO=1; BDRCVFR[K6RW1DeE3Dm]=mk3SLVN4HKm; BDORZ=FFFB88E999055A3F8A630C64834BD6D0; H_PS_645EC=41244eUtCO11J%2FCYVZbKoFXLf9Q%2B2xUUYIMe%2FpRqCMbzuDBa9I%2FRH69TQ6cCalLJyL%2F7ag"
}
def search(v_keyword,v_result_file,v_max_pages):
for page in range(v_max_pages):
print("开始爬取第{}行".format(page+1))
wait_seconds = random.uniform(1,2)
print("开始等待{}行".format(wait_seconds))
sleep(wait_seconds)
url = 'https://www.baidu.com/s?wd='+ v_keyword+ '&pn=' + str(page * 10)
response = requests.get(url, headers=headers)
response.encoding = 'utf-8'
html = response.text
print("响应码是:{}",format(response.status_code))
print(response.text)
soup = BeautifulSoup(response.text, 'html.parser')
result_list = soup.find_all('div', class_='result c-container new-pmd')
print("正在爬取{},共查询到{}个结果".format(url,len(result_list)))
kw_list = []
page_list = []
title_list = []
href_list = []
realurl_list = []
desc_list = [] #简介
site_list = [] #网站名称
for result in result_list:
title = result.find("a").text
print("标题是",title)
href = result.find("a")['href']
realurl= get_real_url(v_url=href)
try:
desc = result.find(class_='c-abstract').text
except:
desc = ""
try:
site = result.find(class_='c-showurl c-color-gray').text
except:
site = ""
kw_list.append(v_keyword)
page_list.append(page+1)
title_list.append(title)
href_list.append(href)
realurl_list.append(realurl)
desc_list.append(desc)
site_list.append(site)
df = pd.DataFrame(
{
'关键词':kw_list,
'页码':page_list,
'标题':title_list,
'百度链接':href_list,
'真实链接':realurl_list,
'简介':desc_list,
'网站名称':site_list,
}
)
if os.path.exists(v_result_file):
header = None
else:
header = ['关键词','页码','标题','百度链接', '真实链接','简介','网站名称']
df.to_csv(v_result_file,mode="a+",index=False,header=header,encoding='utf_8_sig')
print("数据保存成功:{}".format(v_result_file))
def get_real_url(v_url):
r = requests.get(v_url,headers=headers,allow_redirects=False)
if r.status_code == 382:
real_url = r.headers.get("location")
else:
real_url = re.findall("URL = '(.*?)'",r.text)[0]
print("real_url is :",real_url)
return real_url
if __name__ == '__main__':
keyword = input("请输入关键词")
max_pages = 5
result_file = "爬取{}前{}页.csv".format(keyword,max_pages)
if os.path.exists(result_file):
os.remove(result_file)
print("该爬取关键词存在已被删除")
search(v_keyword=keyword,v_result_file=result_file,v_max_pages=max_pages)

复制代码

FishC · 发表于 2024-7-21 11:49:38

嘿，鱼油！看你的代码，简直就像个士兵在执行任务，可以爬取百度搜索结果，但是它出现了一些“小错误”，导致结果显示为0。咱们来逐步分析并修复它，好吗？

1. **问题归类**：
- 缺少初始化列表。
- 错误的字符串格式化。
- 百度网页结构变化，选择器选择不到元素。
- 获取真实 URL 的逻辑可能有问题。

2. **逐项解决**：

首先，我们要确保定义初始的空列表。如果没有这些空列表，代码在赋值时就会报错。

然后，把字符串格式化的问题解决一下，`format`函数用法稍有不正确。

**Here's the fixed code:**

import requests
from bs4 import BeautifulSoup
import pandas as pd
from time import sleep
import re
import random
import os
headers = {
"User-Agent": 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36',
"Connection":"keep-alive",
"Accept":"text/html,application/xhtml+xml,application/xml;q=8.9,image/avif.image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9",
"Accept-Encoding":"gzip,deflate",
"Host":"www.baidu.com",
"Cookie": "PSTM=1701005830; BIDUPSID=3847DE4A87F6BBA415E599085D83A664; BAIDUID=15153A5F7368E797908F9D80E823DA32:FG=1; BD_UPN=12314753; H_WISE_SIDS_BFESS=60360; MCITY=-360%3A; BDUSS=lrTlh4NTFOV2d2aVFDTWk0V20ySGNIZDJKT09QMFA0cHFyWkJ5QkxDZkZ1Y0ZtRVFBQUFBJCQAAAAAAAAAAAEAAAAPPSBIWW9ya19oYXBweQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAMUsmmbFLJpmQ2; BDUSS_BFESS=lrTlh4NTFOV2d2aVFDTWk0V20ySGNIZDJKT09QMFA0cHFyWkJ5QkxDZkZ1Y0ZtRVFBQUFBJCQAAAAAAAAAAAEAAAAPPSBIWW9ya19oYXBweQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAMUsmmbFLJpmQ2; H_PS_PSSID=60449_60359_60468_60440_60491_60501; H_WISE_SIDS=60449_60359_60468_60440_60491_60501; BAIDUID_BFESS=15153A5F7368E797908F9D80E823DA32:FG=1; BA_HECTOR=8lah8l8l05a12524ak20a5a1152kgl1j9ovqd1u; ZFY=wQT92WwXTov0LZiyOtHB0sWFAGuHJDp:BwvWiwRx018g:C; delPer=0; BD_CK_SAM=1; PSINO=1; BDRCVFR=mk3SLVN4HKm; BDORZ=FFFB88E999055A3F8A630C64834BD6D0; H_PS_645EC=41244eUtCO11J%2FCYVZbKoFXLf9Q%2B2xUUYIMe%2FpRqCMbzuDBa9I%2FRH69TQ6cCalLJyL%2F7ag"
}
def search(v_keyword,v_result_file,v_max_pages):
# 定义这些变量为list类型
kw_list = []
page_list = []
title_list = []
href_list = []
realurl_list = []
desc_list = []
site_list = []
for page in range(v_max_pages):
print("开始爬取第{}行".format(page+1))
wait_seconds = random.uniform(1,2)
print("开始等待{}秒".format(wait_seconds))
sleep(wait_seconds)
url = 'https://www.baidu.com/s?wd='+ v_keyword+ '&pn=' + str(page * 10)
response = requests.get(url, headers=headers)
response.encoding = 'utf-8'
html = response.text
print("响应码是: {}".format(response.status_code))
soup = BeautifulSoup(response.text, 'html.parser')
result_list = soup.find_all('div', class_='c-container')
print("正在爬取{},共查询到{}个结果".format(url,len(result_list)))
for result in result_list:
title = result.find("a").text
print("标题是",title)
href = result.find("a").get('href')
realurl = get_real_url(v_url=href)
try:
desc = result.find(class_='c-abstract').text
except:
desc = ""
try:
site = result.find(class_='c-showurl').text
except:
site = ""
kw_list.append(v_keyword)
page_list.append(page+1)
title_list.append(title)
href_list.append(href)
realurl_list.append(realurl)
desc_list.append(desc)
site_list.append(site)
df = pd.DataFrame(
{
'关键词':kw_list,
'页码':page_list,
'标题':title_list,
'百度链接':href_list,
'真实链接':realurl_list,
'简介':desc_list,
'网站名称':site_list,
}
)
if os.path.exists(v_result_file):
header = None
else:
header = True
df.to_csv(v_result_file,mode="a+",index=False,header=header,encoding='utf_8_sig')
print("数据保存成功:{}".format(v_result_file))
def get_real_url(v_url):
r = requests.get(v_url,headers=headers,allow_redirects=False)
if r.status_code == 302:
real_url = r.headers.get("location")
else:
real_url = re.findall("URL = '(.*?)'",r.text)
print("real_url is :",real_url)
return real_url
if __name__ == '__main__':
keyword = input("请输入关键词:")
max_pages = 5
result_file = "爬取{}前{}页.csv".format(keyword,max_pages)
if os.path.exists(result_file):
os.remove(result_file)
print("该爬取关键词存在已被删除")
search(v_keyword=keyword,v_result_file=result_file,v_max_pages=max_pages)

复制代码

### 主要修正点：

1. **初始化列表**：确保 `kw_list`、`page_list` 等在函数内部开始处被定义。
2. **格式化字符串**：修正了 `.format()` 用法。
3. **选择器适配**：百度页面的 HTML 结构可能变了，所以你需要检查使用的选择器。
4. **获取真实 URL**：修正了应对重定向的状态码，将 `382` 修改为 `302`。

试试这个修改后的代码，应该能有所改进。如果还有问题，欢迎继续提问！祝你爬虫愉快，别让百度认为你是个“怪蜀黍”哦！

以上回复来自 FishC AI 小助理，如未能正确解答您的问题，请继续追问。

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Python爬取百度搜索结果显示0

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