import timeimport requests# 爬虫三部曲# 1.发送请求def get_page(url):    response = requests.get(url)    return response # 2.解析数据import redef parse_index(html):#     findall匹配所有#     re.findall('正则匹配规则','匹配文本','匹配模式')#     re.S:对全部文本进行搜索匹配      detail_urls = re.findall('
     
      ',html,re.S)    # print(movie_url)    if movie_url:        return  movie_url[0] #只返回视频的详细网址# 3.保存数据import uuid# uuid.uuid4() 根据时间def save_video(content):    with open('{}.mp4'.format(uuid.uuid4()),'wb') as f:        f.write(content)        print('视频下载完毕')# main + 回车键if __name__ == '__main__':    for line in range(6):        url = 'http://www.xiaohuar.com/list-3-{}.html'.format(line)        # 发送请求        response = get_page(url)        # print(response)        #返回响应状态码        # print(response.status_code)        # 返回响应文本        #print(response.text)        #解析主页页面        detail_urls = parse_index(response.text)        #循环遍历详情页url        for detail_url in detail_urls:            print(detail_url)            # 往每一个详情页发送请求            detail_response = get_page(detail_url)            #print(response.text)            #解析详情页获取视频url            movie_url = parse_detail(detail_response.text)            #判断视频url存在则打印            if movie_url:                print(movie_url)                #往视频url发送请求获取视频二进制流                movie_response = get_page(movie_url)                #把视频的二进制流传给save_video函数去保存到本地                save_video(movie_response.content)