详解用python实现爬取CSDN热门评论URL并存入redis

下面是“详解用python实现爬取CSDN热门评论URL并存入redis”的完整攻略。

一、需求分析

1. 爬取CSDN热门评论的URL
2. 将爬取的URL存入Redis中

二、技术选型

1. 爬取CSDN热门评论的URL：我们可以使用Python的requests和BeautifulSoup库来实现
2. 将爬取的URL存入Redis中：我们可以使用Python的redis库来实现

三、实现步骤

1. 导入所需的库和模块

import requests
from bs4 import BeautifulSoup
import redis

1. 连接Redis

r = redis.Redis(host='localhost', port=6379)

1. 爬取热门评论的URL

url = 'https://www.csdn.net/nav/it'
headers = {
    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3'}

response = requests.get(url, headers=headers)
soup = BeautifulSoup(response.text, 'html.parser')
divs = soup.find_all('div', class_='content')
for div in divs:
    a = div.find('a')
    if a:
        url = a['href']
        if 'blog.csdn.net' in url and '/article/details/' in url:
            print(url)
            # 存入Redis
            r.lpush('csdn_hot_urls', url)

1. 完整代码

import requests
from bs4 import BeautifulSoup
import redis

r = redis.Redis(host='localhost', port=6379)

url = 'https://www.csdn.net/nav/it'
headers = {
    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3'}

response = requests.get(url, headers=headers)
soup = BeautifulSoup(response.text, 'html.parser')
divs = soup.find_all('div', class_='content')
for div in divs:
    a = div.find('a')
    if a:
        url = a['href']
        if 'blog.csdn.net' in url and '/article/details/' in url:
            print(url)
            # 存入Redis
            r.lpush('csdn_hot_urls', url)

四、示例说明

1. 示例1：爬取CSDN热门评论的URL并打印输出

url = 'https://www.csdn.net/nav/it'
headers = {
    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3'}

response = requests.get(url, headers=headers)
soup = BeautifulSoup(response.text, 'html.parser')
divs = soup.find_all('div', class_='content')
for div in divs:
    a = div.find('a')
    if a:
        url = a['href']
        if 'blog.csdn.net' in url and '/article/details/' in url:
            print(url)

1. 示例2：将爬取的URL存入Redis中

import redis

r = redis.Redis(host='localhost', port=6379)

url = 'https://www.csdn.net/nav/it'
headers = {
    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3'}

response = requests.get(url, headers=headers)
soup = BeautifulSoup(response.text, 'html.parser')
divs = soup.find_all('div', class_='content')
for div in divs:
    a = div.find('a')
    if a:
        url = a['href']
        if 'blog.csdn.net' in url and '/article/details/' in url:
            r.lpush('csdn_hot_urls', url)

以上是“详解用python实现爬取CSDN热门评论URL并存入redis”的攻略，希望能够对你有所帮助。