Python网络爬虫——我的第二个爬虫（爬取小说信息）

前言

首先感谢https://blog.csdn.net/c406495762/article/details/78123502，在大佬们的帮助下我完成了人生中第二次爬虫的体验，这次爬取的是小说信息，用到的知识点是Request库和BeautifulSoup库。

开始

1.首先还是老样子

# -*- coding:UTF-8 -*-

2.要用到的包

import requests
import sys
from bs4 import BeautifulSoup

3.存放URL等信息的方法

def __init__(self):
self.server = 'http://www.biqukan.com/'
self.target = 'http://www.biqukan.com/1_1094/'
self.names = []  # 存放章节名
self.urls = []  # 存放章节链接
self.nums = 0  # 章节数

4.获取下载链接的方法

def get_download_url(self):
# 获取下载链接
req = requests.get(url=self.target)
html = req.text
div_bf = BeautifulSoup(html,"html.parser")
div = div_bf.find_all('div', class_='listmain')
a_bf = BeautifulSoup(str(div[0]),"html.parser")
a = a_bf.find_all('a')
self.nums = len(a[15:])  #剔除不必要的章节，并统计章节数
for each in a[15:]:
self.names.append(each.string)
self.urls.append(self.server + each.get('href'))

def get_contents(self,target):

# 获取章节内容

req = requests.get(url=target)

html = req.text

bf = BeautifulSoup(html,”html.parser”)

texts = bf.find_all(‘div’, class_=’showtxt’)

texts = texts[0].text.replace(‘\xa0’*8,’\n\n’)

return texts

获取章节内容的方法

6.将获取的内容写入文件的方法

def writer(self, name, path, text):
#写入文件
write_flag = True
with open(path,'a', encoding='utf-8') as f:
f.write(name + '\n')
f.writelines(text)
f.write('\n\n')

7.主函数

if __name__ == "__main__":
dl = downloader()
dl.get_download_url()
print('《一年永恒》开始下载：')
for i in range(dl.nums):
dl.writer(dl.names[i], '一念永恒.txt', dl.get_contents(dl.urls[i]))
sys.stdout.write("  已下载:%.3f%%" % float(i / dl.nums) + '\r')
sys.stdout.flush()
print('《一年永恒》下载完成')

8.完整代码片

# -*- coding:UTF-8 -*-

import requests
import sys
from bs4 import BeautifulSoup

class downloader(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
self.urls = []  # 存放章节链接
self.nums = 0  # 章节数

def get_download_url(self):
# 获取下载链接
req = requests.get(url=self.target)
html = req.text
div_bf = BeautifulSoup(html,"html.parser")
div = div_bf.find_all('div', class_='listmain')
a_bf = BeautifulSoup(str(div[0]),"html.parser")
a = a_bf.find_all('a')
self.nums = len(a[15:])  #剔除不必要的章节，并统计章节数
for each in a[15:]:
self.names.append(each.string)
self.urls.append(self.server + each.get('href'))

def get_contents(self,target):
# 获取章节内容
req = requests.get(url=target)
html = req.text
bf = BeautifulSoup(html,"html.parser")
texts = bf.find_all('div', class_='showtxt')
texts = texts[0].text.replace('\xa0'*8,'\n\n')
return texts

def writer(self, name, path, text):
#写入文件
write_flag = True
with open(path,'a', encoding='utf-8') as f:
f.write(name + '\n')
f.writelines(text)
f.write('\n\n')

if __name__ == "__main__":
dl = downloader()
dl.get_download_url()
print('《一年永恒》开始下载：')
for i in range(dl.nums):
dl.writer(dl.names[i], '一念永恒.txt', dl.get_contents(dl.urls[i]))
sys.stdout.write("  已下载:%.3f%%" % float(i / dl.nums) + '\r')
sys.stdout.flush()
print('《一年永恒》下载完成')=

后记

在大佬们的帮助下完成了第二次爬虫，也对Requests和BeautifulSorp库有了更多的认识，我会自己继续努力，写出一个属于自己的爬虫。