爬虫项目（12）：正则、多线程抓取腾讯动漫，Flask展示数据

文章目录

- 书籍推荐
- 正则抓取腾讯动漫数据
- Flask展示数据

书籍推荐

如果你对Python网络爬虫感兴趣，强烈推荐你阅读《Python网络爬虫入门到实战》。这本书详细介绍了Python网络爬虫的基础知识和高级技巧，是每位爬虫开发者的必读之作。详细介绍见👉：《Python网络爬虫入门到实战》书籍介绍

正则抓取腾讯动漫数据

import requests
import re
import threading
from queue import Queue


def format_html(html):
    li_pattern = re.compile('<li class="ret-search-item clearfix">[\s\S]+?</li>')

    title_pattern = re.compile('title="(.*?)"')
    img_src_pattern = re.compile('data-original="(.*?)"')
    update_pattern = re.compile('<span class="mod-cover-list-text">(.*?)</span>')
    tags_pattern = re.compile('<span href="/Comic/all/theme/.*?" target="_blank">(.*?)</span>')
    popularity_pattern = re.compile('<span>人气：<em>(.*?)</em></span>')

    items = li_pattern.findall(html)
    for item in items:
        title = title_pattern.search(item).group(1)
        img_src = img_src_pattern.search(item).group(1)
        update_info = update_pattern.search(item).group(1)
        tags = tags_pattern.findall(item)
        popularity = popularity_pattern.search(item).group(1)

        data_queue.put(f'{title},{img_src},{update_info},{"#".join(tags)},{popularity}\n')


def run(index):
    try:
        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'
        }
        response = requests.get(f"https://ac.qq.com/Comic/index/page/{index}", headers=headers)
        html = response.text
        format_html(html)
    except Exception as e:
        print(f"Error occurred while processing page {index}: {e}")
    finally:
        semaphore.release()


if __name__ == "__main__":
    data_queue = Queue()
    semaphore = threading.BoundedSemaphore(5)
    lst_record_threads = []

    for index in range(1, 3):
        print(f"正在抓取{index}")
        semaphore.acquire()
        t = threading.Thread(target=run, args=(index,))
        t.start()
        lst_record_threads.append(t)

    for rt in lst_record_threads:
        rt.join()

    with open("./qq_comic_data.csv", "a+", encoding="gbk") as f:
        while not data_queue.empty():
            f.write(data_queue.get())

    print("数据爬取完毕")

Flask展示数据

上面能够实现爬取数据，但是我希望展示在前端。

main.py代码如下：

# coding= gbk
from flask import Flask, render_template
import csv

app = Flask(__name__)


def read_data_from_csv():
    with open("qq_comic_data.csv", "r", encoding="utf-8") as f:
        reader = csv.reader(f)
        data = list(reader)[1:]  # 跳过标题行

        # 统一转换人气数据为浮点数（单位：亿）
        for row in data:
            popularity = row[4]
            if '亿' in popularity:
                row[4] = float(popularity.replace('亿', ''))
            elif '万' in popularity:
                row[4] = float(popularity.replace('万', '')) / 10000  # 将万转换为亿

        # 按人气排序并保留前10条记录
        data.sort(key=lambda x: x[4], reverse=True)
        return data[:10]

@app.route('/')
def index():
    comics = read_data_from_csv()
    return render_template('index.html', comics=comics)

if __name__ == '__main__':
    app.run(debug=True)

templates/index.html如下：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>漫画信息</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            background-color: #f4f4f4;
            color: #333;
            line-height: 1.6;
            padding: 20px;
        }
        .container {
            width: 80%;
            margin: auto;
            overflow: hidden;
        }
        h1 {
            text-align: center;
            color: #333;
        }
        .comic {
            background: #fff;
            margin-bottom: 20px;
            padding: 15px;
            border-radius: 10px;
            box-shadow: 0 5px 10px rgba(0,0,0,0.1);
        }
        .comic h2 {
            margin-top: 0;
        }
        .comic p {
            line-height: 1.25;
        }
        .comic:nth-child(even) {
            background: #f9f9f9;
        }
    </style>
</head>
<body>
    <div class="container">
        <h1>人气前10的漫画</h1>
        {% for comic in comics %}
            <div class="comic">
                <h2>{{ comic[0] }}</h2>
                <p><strong>更新信息：</strong>{{ comic[2] }}</p>
                <p><strong>类型：</strong>{{ comic[3] }}</p>
                <p><strong>人气：</strong>{{ comic[4] }}</p>
            </div>
        {% endfor %}
    </div>
</body>
</html>