任务:爬取B站上最爱欢迎的编程课程
打开网页的代码模块,如下图:

标题均位于class_="bili-video-card__info--tit"的h3标签中,下面通过代码来实现,需要说明的是URL中的中文写到程序中,已自动转义:
python
import requests
from bs4 import BeautifulSoup
url = 'https://search.bilibili.com/all?keyword=%E7%BC%96%E7%A8%8B&from_source=banner_search&order=show&duration=0&tids_1=0'
headers = {
'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36'
}
# 设置请求头,模拟浏览器访问
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"
}
# 发送GET请求
response = requests.get(url, headers=headers)
# 检查请求是否成功
if response.status_code == 200:
# 解析HTML内容
soup = BeautifulSoup(response.text, "html.parser")
# 查找所有<h3>标签
h3_tags = soup.find_all("h3", class_="bili-video-card__info--tit")
# 遍历所有<h3>标签,提取title属性值
for index, h3_tag in enumerate(h3_tags, start=1):
title = h3_tag.get("title")
if title:
print(f"Title {index}: {title}")
else:
print(f"Title {index}: 无title属性")
else:
print("请求失败,状态码:", response.status_code)
输出:

需要注意的是:网页的代码并非一成不变,爬取时一定要使用F12分析其代码结构。