基础爬虫，翻译爬虫，小说爬虫

分手后的思念是犯贱 2023-06-21 10:20 43阅读 0赞

基础爬虫：

# -*- coding: utf-8 -*-
    
    import requests
    
    url = 'https://www.baidu.com'  # 注释1
    headers = {
        
        # 注释2
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) \
        AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36'
    }
    response = requests.get(url=url, headers=headers)  # 注释3
    content = response.content.decode()  # 注释4
    print(content)  # 注释5

翻译爬虫：

from urllib import request, parse
    import json
    
    if __name__ == '__main__':
        baseurl = "https://fanyi.baidu.com/sug"
        word = input("请输入您想输入的单词:")
        # 我们需要传送过去的数据
        datas = {
        
            'kw': word
        }
        # 对数据进行编码
        data = parse.urlencode(datas).encode()
        # 写ｈｔｔｐ头部，至少需要Content-Length
        headers = {
        
            # 此处为编码后的长度
            'Content-Length': len(data),
        }
        # 将数据传送
        req = request.Request(url=baseurl, data=data, headers=headers)
        res = request.urlopen(req)
    
        json_data = res.read()
        json_data = json_data.decode()
        json_data = json.loads(json_data)
        # data里面是一个list
        data_list = json_data.get('data')
        for item in data_list:
            print(item['k'], '---', item['v'])

小说爬虫：

# -*- coding:UTF-8 -*-
    from bs4 import BeautifulSoup
    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
    """
    class downloader(object):
    
        def __init__(self):
            self.server = 'https://www.biqukan.com/'
            self.target = 'https://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')
            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)
                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')