python 爬虫 抓取文字 爬虫爬取文字

注意：只是文字，其他都行，自己实现吧。

1 import requests
  2 from lxml import etree
  3 from urllib.request import urlopen, Request
  4 
  5 import time
  6 class blog():
  7 
  8     def __init__(self,url):
  9         self.base_url = url
 10         self.headers = {"User-Agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.86 Safari/537.36"}#模拟浏览器
 11 
 12     def get_html(self,url):
 13         response = requests.get(url, self.headers, timeout = 5)#因为请求方式位get所以，用get请求
 14         if response.status_code == 200:#访问正常状态码为200
 15             response.encoding = response.apparent_encoding
 16             return response.text
 17         return None
 18     def get_url1(self,html):#获取每个分页内的文章标题和url
 19         url_1 = []
 20         name = []
 21         x_html = etree.HTML(html)
 22         #print(x_html)
 23         url_1 = x_html.xpath('//a[@class="postTitle2"]/@href')
 24         name = x_html.xpath('//a[@class="postTitle2"]/text()')
 25         names = []
 26 
 27         for i in name:
 28             names.append(i.strip())#去除空格
 29         if names:
 30             return names, url_1
 31         else:
 32             return None
 33     def get_url2(self,s):
 34 
 35         url = self.base_url + "default.html?page=" + s
 36         return url
 37     def get_text(self,html):
 38         x_html = etree.HTML(html)
 39         txt = []
 40 
 41         txt = x_html.xpath('//div[@]//p//text()')
 42         return txt
 43     def save_text(self,name,txt):#保存成txt文件，txt是文章内容
 44         print(name + "loading...")
 45         with open("C:/Users/25766/Desktop/sa/" + name + '.txt','w',encoding='utf-8') as f:#文件路径
 46             for i in txt:
 47                 f.write(i)
 48                 f.write('\n')
 49             f.close()
 50         print("finsh")
 51 surl = input("输入爬取博客的首页url:")
 52 c = blog(surl)
 53 for i in range(1,200):#获取其各个分页，通过规律发现
 54     url = c.get_url2(str(i))
 55     ls = c.get_html(url)
 56     #print(ls)
 57     time.sleep(2)
 58     names, urls = c.get_url1(ls)
 59     for name, url in zip(names,urls):
 60         #print(name,":", url)
 61         html = c.get_html(url)
 62         txt = c.get_text(html)
 63         c.save_text(name[:5],txt)#以前5个字符命名
 64 
 65 
 66 
 67

追求吾之所爱