python+requests+re匹配抓取猫眼上映电影信息

python+requests抓取猫眼中上映电影，re正则匹配获取对应电影的排名，图片地址，片名，主演及上映时间和评分

import requests
import re, json

def get_html(url):
    """
    获取网页html源码
    :return:
    """
    user_agent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) " \
                 "AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36"
    # 浏览器信息
    headers = {
        "User-Agent": user_agent
    }
    r = requests.get(url, headers=headers)
    html = r.text
    # print(html)
    return html

def parse_one_page(html):
    """
    正则匹配需要内容
    :param html:
    :return:
    """
    # 排名+图片地址+主演+上映时间+评分
    pattern = re.compile('<dd>.*?board-index.*?>(\d+)</i>.*?data-src="(.*?)".*?name"><a'
                         + '.*?>(.*?)</a>.*?star">(.*?)</p>.*?releasetime">(.*?)</p>'
                         + '.*?integer">(.*?)</i>.*?fraction">(.*?)</i>.*?</dd>', re.S)

    items = re.findall(pattern, html)

    for item in items:
        yield {
            "排名": item[0],
            "图片地址": item[1],
            "片名": item[2],
            "主演": item[3].strip()[3:],
            "上映时间": item[4].strip()[4:],
            "分数": item[5] + item[6]
        }

# 数据存储

def write_file(content):
    with open("result.txt", 'a+', encoding='utf-8') as f:
        f.write(json.dumps(content, ensure_ascii=False) + "\n")

def main():
    """
    主函数
    :return:
    """
    url = "http://maoyan.com/board/4"
    html = get_html(url)
    for item in parse_one_page(html):
        print(item)
        write_file(item)

if __name__ == '__main__':
    main()