import json
    import re
    import requests
    from requests.exceptions import RequestException
    import time
    
    # 获取html
    def get_one_page(url):
        try:
            headers={
                'User-Agent':'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.164 Safari/537.36'
            }
            response=requests.get(url,headers=headers)
            if response.status_code==200:
                return response.text
            return None
        except RequestException:
            return None
    
    # 正则表达式提取
    def parse_one_page(html):
        pattern=re.compile(
            '<dd>.*?board-index.*?>(.*?)</i>.*?data-src="(.*?)".*?name.*?a.*?>(.*?)</a>.*?star">(.*?)</p>.*?releasetime.*?>(.*?)</p>.*?integer.*?>(.*?)</i>.*?fraction.*?>(.*?)</i>.*?</dd>'
        ,re.S)
        items=re.findall(pattern,html)
        # print(items) #打印 正则表达式匹配的每页的数据
        for item in items:
            print(item) # 打印每个电影的数据
            # for ii in item: # 打印每条 像 index title 等内容
            #     print(ii)
            yield{
                'index':item[0],
                'image': item[1],
                'title': item[2],
                'actor': item[3].strip(),
                'time': item[4].strip()[5:],
                'score': item[5]+item[6]
            }
    def write_to_file(content):
        with open('result.txt','a',encoding='utf-8') as f: # 因为是循环main所以要打开多次，需要a
            # print(content) # 打印要写入的json内容
            # print(type(json.dumps(content))) # 打印jso类型
            f.write(json.dumps(content,ensure_ascii=False)+'\n')
    
    def main(offset):
        url="https://maoyan.com/board/4?offset="+str(offset)
        # print(url) # 打印url
        html=get_one_page(url)
        # print(html) #打印原始html网页
        for item in parse_one_page(html):
            write_to_file(item)
    
    if __name__ == '__main__':
        for i in range(10):
            main(offset=i*10)
            time.sleep(1)