python-爬虫篇-爬取百度贴吧，段友之家的图片和视频

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在这里插入图片描述


#!/usr/bin/env python
# -*- coding: utf-8 -*-"""
爬取百度贴吧，段友之家的图片和视频
author: cuizy
time：2018-05-19
"""import requests
import bs4
import osdef write_file(file_url, file_type):"""写入文件"""res = requests.get(file_url)res.raise_for_status()# 文件类型分文件夹写入if file_type == 1:file_folder = 'nhdz\\jpg'elif file_type == 2:file_folder = 'nhdz\\mp4'else:file_folder = 'nhdz\\other'folder = os.path.exists(file_folder)# 文件夹不存在，则创建文件夹if not folder:os.makedirs(file_folder)# 打开文件资源，并写入file_name = os.path.basename(file_url)str_index = file_name.find('?')if str_index > 0:file_name = file_name[:str_index]file_path = os.path.join(file_folder, file_name)print('正在写入资源文件：', file_path)image_file = open(file_path, 'wb')for chunk in res.iter_content(100000):image_file.write(chunk)image_file.close()print('写入完成！')def download_file(web_url):"""获取资源的url"""# 下载网页print('正在下载网页： %s...' % web_url)result = requests.get(web_url)soup = bs4.BeautifulSoup(result.text, "html.parser")# 查找图片资源img_list = soup.select('.vpic_wrap img')if img_list == []:print('未发现图片资源！')else:# 找到资源，开始写入for img_info in img_list:file_url = img_info.get('bpic')write_file(file_url, 1)# 查找视频资源video_list = soup.select('.threadlist_video a')if video_list == []:print('未发现视频资源！')else:# 找到资源，开始写入for video_info in video_list:file_url = video_info.get('data-video')write_file(file_url, 2)print('下载资源结束：', web_url)next_link = soup.select('#frs_list_pager .next')if next_link == []:print('下载资料结束！')else:url = next_link[0].get('href')download_file('https:' + url)# 主程序入口
if __name__ == '__main__':web_url = 'https://tieba.baidu.com/f?ie=utf-8&kw=段友之家'download_file(web_url)