Python實戰---使用正則表達式爬取古詩文網

使用正則表達式爬取古詩文網

爬取目標

具體字段爲：

• title 標題
• dynasty 朝代
• author 作者
• content 內容
• tag 標籤

實現代碼

'''
@Description: 使用正則表達式爬取古詩詞網
@Author: sikaozhifu
@Date: 2020-06-09 14:55:44
@LastEditTime: 2020-06-09 15:55:47
@LastEditors: Please set LastEditors
'''
import requests
import re
from lxml import etree
poems = []


def parse_url(url):  # 解析url返回的文檔
    headers = {
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36'
    }
    response = requests.get(url, headers=headers)
    text = response.text
    titles = re.findall(r'<div\sclass="cont">.*?<b>(.*?)</b>', text, re.DOTALL)
    dynasties = re.findall(r'<p\sclass="source">.*?<a.*?>(.*?)</a>', text, re.DOTALL)
    authors = re.findall(r'<p\sclass="source">.*?<a.*?>.*?</a>.*?<a.*?>(.*?)</a>', text, re.DOTALL)
    contents_temp = re.findall(r'<div\sclass="contson".*?>(.*?)</div>', text, re.DOTALL)
    contents = []
    for content in contents_temp:
        contents.append(re.sub('<.*?>', '', content).strip())
    # 使用lxml解析
    html = etree.HTML(text)
    tag_element = html.xpath('//div[@class = "tag"]')
    tags = []
    for tag_temp in tag_element:
        tag = tag_temp.xpath('string(.)')
        # 去掉標籤字段中的空格、回車、換行等。
        tag = tag.replace('\n', '').replace('\r', '').replace(' ', '')
        tags.append(tag)
    for value in list(zip(titles, dynasties, authors, contents, tags)):
        title, dynasty, author, content, tag = value
        poem = {
            'title': title,
            'dynasty': dynasty,
            'author': author,
            'content': content,
            'tag': tag
        }
        poems.append(poem)


def main():
    for x in range(1, 11):# 共有10頁
        url = 'https://www.gushiwen.org/default_%s.aspx' % x
        parse_url(url)
    print(poems)


if __name__ == "__main__":
    main()

結果展示