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,' ') # .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 + ' ') 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(' ') #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) + ' ') #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% ' '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+' '*2+text) return full_text def writer(self,path,text): with open(path, 'a') as f: f.write(text+' ') 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 + ' ') sys.stdout.flush()