python--爬取豆瓣热门国产电视剧保存为文件

# -*- coding: utf-8 -*-
__author__ = 'Frank Li'
import requests
import json

class HotSpider(object):
    def __init__(self):
        self.url = "https://m.douban.com/rexxar/api/v2/subject_collection/filter_tv_domestic_hot/items?os=android&for_mobile=1&start={}&count=18&loc_id=108288"
        self.session = requests.session()
        self.headers = {"Referer": "https://m.douban.com/tv/chinese",
                        "User-Agent": "Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA58N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Mobile Safari/537.36"}

    def parse_2_list_from_str(self,url):
        return json.loads(self.session.get(url,headers=self.headers).content.decode())['subject_collection_items']

    def save_as_file(self,content_list,file):
        with open(file,'a',encoding='utf-8') as f:
            for content in content_list:
                f.write(json.dumps(content,ensure_ascii=False))
                f.write('\n')

    def run(self):
        url = self.url.format(0)
        num = 0
        total = 500
        while num<total+18:
            print(url)
            self.save_as_file(self.parse_2_list_from_str(url),'hot.json')
            num+=18
            url=self.url.format(num)

if __name__ == '__main__':
    hot_spider = HotSpider()
    hot_spider.run()

使用 xpath 爬取正在热映的 电影保存为 json 文件

# -*- coding: utf-8 -*-
__author__ = 'Frank Li'
import requests
from lxml import etree
import json

url = "https://movie.douban.com/cinema/nowplaying/changsha/"
headers = {"Referer":"https://movie.douban.com/cinema/nowplaying/changsha/",
           "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36"}
sess = requests.session()
response = sess.get(url,headers=headers)
html_str = response.content.decode()
element = etree.HTML(html_str)
movie_img_list = element.xpath("//div[@class='mod-bd']/ul[@class='lists']//li[@class='poster']//img/@src")
movie_name_list = element.xpath("//div[@class='mod-bd']/ul[@class='lists']//li[@class='stitle']/a/@title")
movie_addr_list = element.xpath("//div[@class='mod-bd']/ul[@class='lists']//li[@class='stitle']/a/@href")
movie_score_list = element.xpath("//div[@class='mod-bd']/ul[@class='lists']//li[@class='srating']/span[@class='subject-rate']/text()")

for name,img,addr,score in zip(movie_name_list,movie_img_list,movie_addr_list,movie_score_list):
    item = {}
    item['name'] = name
    item['img'] = img
    item['addr'] = addr
    item['score'] = score
    with open('movie.json','a',encoding='utf-8') as f:
        item_json = json.dumps(item, ensure_ascii=False, indent=2)
        print(item_json)
        f.write(item_json)
        f.write('\n')
        f.flush()

保存下来的 movie.json 文件

{
  "name": "碟中谍6：全面瓦解",
  "img": "https://img3.doubanio.com/view/photo/s_ratio_poster/public/p2529365085.jpg",
  "addr": "https://movie.douban.com/subject/26336252/?from=playing_poster",
  "score": "8.3"
}
{
  "name": "阿尔法：狼伴归途",
  "img": "https://img1.doubanio.com/view/photo/s_ratio_poster/public/p2530871439.jpg",
  "addr": "https://movie.douban.com/subject/26810318/?from=playing_poster",
  "score": "6.5"
}
{
  "name": "蚁人2：黄蜂女现身",
  "img": "https://img1.doubanio.com/view/photo/s_ratio_poster/public/p2529389608.jpg",
  "addr": "https://movie.douban.com/subject/26636712/?from=playing_poster",
  "score": "7.5"
}
{
  "name": "传奇的诞生",
  "img": "https://img1.doubanio.com/view/photo/s_ratio_poster/public/p2531286907.jpg",
  "addr": "https://movie.douban.com/subject/3073268/?from=playing_poster",
  "score": "7.6"
}
{
  "name": "快把我哥带走",
  "img": "https://img3.doubanio.com/view/photo/s_ratio_poster/public/p2531080870.jpg",
  "addr": "https://movie.douban.com/subject/30122633/?from=playing_poster",
  "score": "7.0"
}
{
  "name": "道高一丈",
  "img": "https://img1.doubanio.com/view/photo/s_ratio_poster/public/p2530863118.jpg",
  "addr": "https://movie.douban.com/subject/26954268/?from=playing_poster",
  "score": "5.7"
}
{
  "name": "李宗伟：败者为王",
  "img": "https://img3.doubanio.com/view/photo/s_ratio_poster/public/p2530870325.jpg",
  "addr": "https://movie.douban.com/subject/27195119/?from=playing_poster",
  "score": "7.1"
}
{
  "name": "西虹市首富",
  "img": "https://img1.doubanio.com/view/photo/s_ratio_poster/public/p2529206747.jpg",
  "addr": "https://movie.douban.com/subject/27605698/?from=playing_poster",
  "score": "6.7"
}
{
  "name": "一出好戏",
  "img": "https://img3.doubanio.com/view/photo/s_ratio_poster/public/p2529571873.jpg",
  "addr": "https://movie.douban.com/subject/26985127/?from=playing_poster",
  "score": "7.3"
}
{
  "name": "精灵旅社3：疯狂假期",
  "img": "https://img3.doubanio.com/view/photo/s_ratio_poster/public/p2530591543.jpg",
  "addr": "https://movie.douban.com/subject/26630714/?from=playing_poster",
  "score": "6.9"
}
{
  "name": "苏丹",
  "img": "https://img3.doubanio.com/view/photo/s_ratio_poster/public/p2529570494.jpg",
  "addr": "https://movie.douban.com/subject/26728641/?from=playing_poster",
  "score": "7.0"
}
{
  "name": "巨齿鲨",
  "img": "https://img3.doubanio.com/view/photo/s_ratio_poster/public/p2530572643.jpg",
  "addr": "https://movie.douban.com/subject/26426194/?from=playing_poster",
  "score": "6.0"
}
{
  "name": "藏北秘岭-重返无人区",
  "img": "https://img3.doubanio.com/view/photo/s_ratio_poster/public/p2532522676.jpg",
  "addr": "https://movie.douban.com/subject/30208007/?from=playing_poster",
  "score": "6.2"
}
{
  "name": "那些女人",
  "img": "https://img3.doubanio.com/view/photo/s_ratio_poster/public/p2530146643.jpg",
  "addr": "https://movie.douban.com/subject/26574965/?from=playing_poster",
  "score": "5.3"
}
{
  "name": "草戒指",
  "img": "https://img1.doubanio.com/view/photo/s_ratio_poster/public/p2531782507.jpg",
  "addr": "https://movie.douban.com/subject/27204180/?from=playing_poster",
  "score": "5.6"
}
{
  "name": "吻隐者",
  "img": "https://img3.doubanio.com/view/photo/s_ratio_poster/public/p2531980221.jpg",
  "addr": "https://movie.douban.com/subject/26928809/?from=playing_poster",
  "score": "7.6"
}
{
  "name": "禹神传之寻找神力",
  "img": "https://img3.doubanio.com/view/photo/s_ratio_poster/public/p2532781444.jpg",
  "addr": "https://movie.douban.com/subject/30227727/?from=playing_poster",
  "score": "6.6"
}
{
  "name": "大师兄",
  "img": "https://img1.doubanio.com/view/photo/s_ratio_poster/public/p2528842218.jpg",
  "addr": "https://movie.douban.com/subject/27201353/?from=playing_poster",
  "score": "6.2"
}

简单多线程 图片下载

import requests
from bs4 import BeautifulSoup
import os
import threading

def download_img(src,target=None):
    parent_dir = './img'
    os.makedirs(parent_dir,exist_ok=True)
    r = requests.get(src,stream=True)
    target = src.split('/')[-1]
    target = os.path.join(parent_dir,target)
    print(threading.current_thread(),' start to download img: ',target)
    with open(target,'wb') as tar_file:
        for chunk in r.iter_content(chunk_size=128):
            tar_file.write(chunk)
        print('saved {}'.format(target))
        

        
if __name__ == '__main__':
    URL = 'https://tieba.baidu.com/p/6034793219'
    html = requests.get(URL).text
    soup = BeautifulSoup(html,'lxml')
    # print(html)
    imgs = []
    srcs = soup.find_all('img',{'class':'BDE_Image'})
    for src in srcs:
        imgs.append(src['src'])
    
    threads = []
    for i,img in enumerate(imgs):
        t = threading.Thread(target=download_img,args=(img,),name='Thread-{}'.format(i))
        t.start()
        threads.append(t)
    for t in threads:
        t.join()