[Python知识库]爬虫实战项目

豆瓣TOP250电影

听说所有爬虫学习都是从这开始的？

import requests
import re
from bs4 import BeautifulSoup

header = {
    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.54 Safari/537.36 Edg/95.0.1020.30',
    'Host': 'movie.douban.com'
}
r = requests.get('https://movie.douban.com/top250', headers=header)
titlehtml = re.findall('<span class="title">.+</span>', r.text)

for i in range(0, 10):
    r = requests.get('https://movie.douban.com/top250?start=' + str(i * 25), headers=header)
    title_html = re.findall('<span class="title">[\u4E00-\u9FFF]+</span>', r.text)
    for j in title_html:
        title = j[20:len(j) - 7:1]
        print(title)

请求头信息用来通过反爬虫机制，匹配任意中文的正则用? [\u4E00-\u9FFF]+

爬取某小说网站动物庄园，分章节存为txt文件

# 创建并写入文件函数
def write(name, text):
    f = open(name + '.txt', 'x')
    f.write(text)
    f.close()


r = requests.get('https://www.kanunu8.com/book3/6879/')
r.encoding = 'gb2312'
# 获取分章节链接
mainBody = re.findall('正文(.*?)</tbody>', r.text, re.S)
link = re.findall('<a href=".+.html">[\u4E00-\u9FFF]+</a>', mainBody[0])

# 构建章节名-链接字典
linkDic = {}
for str in link:
    where = re.search('[0-9]+.html', str).group()
    name = re.search('[\u4E00-\u9FFF]+', str).group()
    linkDic.update({name: where})

# 提取章节网页正文，存于字典中
mainText = {}
for name in linkDic:
    rr = requests.get('https://www.kanunu8.com/book3/6879/' + linkDic[name])
    rr.encoding = 'GBK'
    paragraph = re.search('<p>(.*?)</p>', rr.text, re.S).group(1)
    paragraph = paragraph.replace('<br />', '')
    mainText.update({name: paragraph})
    write(name, paragraph)