1.
# -*- coding:UTF-8 -*-
from bs4 import BeautifulSoup #BeautifulSoup就是处理字符串的工具
import requests, sys """
类说明:下载《笔趣看》网小说《一念永恒》
Parameters:
无
Returns:
无
Modify:
2017-09-13
代码出处
https://zhuanlan.zhihu.com/p/29809609
"""
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 """
函数说明:获取下载链接
Parameters:
无
Returns:
无
Modify:
2017-09-13
"""
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:]) #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')) """
函数说明:获取章节内容
Parameters:
target - 下载连接(string)
Returns:
texts - 章节内容(string)
Modify:
2017-09-13
"""
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,'\n\n') # .text去掉非文字的符号,是bs4的标签属性 .text属性包含了标签内的子标签的内容
return texts """
函数说明:将爬取的文章内容写入文件
Parameters:
name - 章节名称(string)
path - 当前路径下,小说保存名称(string)
text - 章节内容(string)
Returns:
无
Modify:
2017-09-13
"""
def writer(self, name, path, text):
write_flag = True
with open(path, 'a', encoding='utf-8') as f:
f.write(name + '\n')
f.writelines(text) #file.writelines(sequence)的参数是序列，比如列表，它会迭代帮你写入文件。
f.write('\n\n') #file.write(str)的参数是一个字符串，就是你要写入文件的内容 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') #其中%.3f表示精确到3位， 后面的2个%表示字符”%“，在3位小数后面会显示出来一个% '\r'表示换行符
sys.stdout.flush() #刷新stdout缓存，这样会实时的显示输出。https://zhidao.baidu.com/question/575650032.html
print('《一年永恒》下载完成')
2. 用pquery改写代码如下，增加了可以定量下载小说的功能，并且在动态输出进程改写为 类似 50%的格式，而不是0.50 %，
# 爬取笔趣阁小说
# encoding: utf-8
from pyquery import PyQuery as pq
import sys class downloader(): def __init__(self):
self.base_server = 'http://www.biqukan.com'
self.base_url = 'http://www.biqukan.com/1_1094/'
self.url_list = []
self.full_urls = []
self.nums = 0
self.wanted_pages_num = 0 def get_url(self):
doc = pq(self.base_url)
target_a = doc('dd a').items()
for each_a in target_a:
each_url = each_a.attr.href
self.url_list.append(each_url)
self.nums= len(self.url_list)
for each in self.url_list[15:]:
each_full_url = self.base_server + each
self.full_urls.append(each_full_url) def get_content(self,target):
content = pq(target)
text = content('#content').text()
head = content('h1').text()
full_text = (head+'\n'*2+text)
return full_text def writer(self,path,text):
with open(path, 'a') as f:
f.write(text+'\n') def choose_page(self):
begin = input('please input your starting page: ')
end = input('please input your ending page: ')
self.wanted_pages_num = int(end)-int(begin)
return self.wanted_pages_num if __name__ == "__main__":
dl = downloader()
dl.get_url()
print("总章节数: ", dl.nums) number = dl.choose_page()
for i in range(number1):
each_url = dl.full_urls[i]
each_text = dl.get_content(each_url)
dl.writer('321.txt',each_text) x = (i / number * 100)
sys.stdout.write("已下载:%.2f %% " % x + '\r')
sys.stdout.flush()