python 爬虫入门之爬小说

##第一步 导包
from bs4 import BeautifulSoup
import requests
import sys

##准备
class downloder(object):
    def __init__(self):
        self.server = 'http://www.biqukan.com'
        self.target = 'http://www.biqukan.com/1_1094/'
        self.names = []  #存放章节名字
        self.urls = [] #存放章节链接
        self.nums = 0 # 章节数量
    def get_download_url(self):
        req = requests.get(url=self.target)
        html = req.text
        div_bf = BeautifulSoup(html)
        div = div_bf.find_all('div',class_='listmain')
        a_bf = BeautifulSoup(str(div[0]))
        a = a_bf.find_all('a')
        self.nums = len(a[15:])
        for eatch in a[15:]:
            self.names.append(eatch.string)
            self.urls.append(self.server +eatch.get('href'))
    def writer(self ,name,path,text):
        write_flag = True
        with open(path,'a',encoding='utf-8') as f:
            f.write(name +'
')
            f.writelines(text)
            f.writelines('

')
    def get_contents(self,target):
        req = requests.get(url=target)
        html = req.text
        bf = BeautifulSoup(html)
        texts = bf.find_all('div',class_ = 'showtxt')
        texts = texts[0].text.replace( 'xa0'*8,'

')
        return texts



if __name__ == '__main__':
    dl = downloder()
    dl.get_download_url()
    print('开始下载')
    for i in range(dl.nums):
        dl.writer(dl.names[i],'用点.txt',dl.get_contents(dl.urls[i]))
    print("下载完成")




参考华哥的内容... 还有好多不懂
http://cuijiahua.com/blog/2017/10/spider_tutorial_1.html