爬虫——爬取猫眼电影网

import json
from multiprocessing import Pool
import requests
from requests.exceptions import RequestException
import re


def get_one_page(url):
    try:
        headers={"user-agent":'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.94 Safari/537.36'}
        response = requests.get(url,headers=headers)
        if response.status_code == 200:
            return response.text
        return None
    except RequestException:
        return None

def parse_one_page(html):
    pattern = re.compile('
.*?board-index.*?>(\d+).*?data-src="(.*?)".*?name">                         +'.*?>(.*?).*?star">(.*?)
.*?releasetime">(.*?)
'
                          +'.*?integer">(.*?).*?fraction">(.*?).*?
', re.S)
    items = re.findall(pattern, html)
    for item in items:
        yield {
            'index': item[0],
            'image': item[1],
            'title': item[2],
            'actor': item[3].strip()[3:],
            'time': item[4].strip()[5:],
            'score': item[5]+item[6]
        }

def write_to_file(content):
    with open('E:\\doc\\bawei\\pachong\\maoyan_movie_result.txt', 'a', encoding='utf-8') as f: #路径
        f.write(json.dumps(content, ensure_ascii=False) + '\n')
        f.close()

def main(offset):
    url = 'http://maoyan.com/board/4?offset='+str(offset)
    url='http://www.baidu.com'
    html = get_one_page(url)
    # print(html)
    for item in parse_one_page(html):
        print(item)
        write_to_file(item)

if __name__ == '__main__':
    for i in range(10):
        main(i*10)
    pool = Pool()  # 建立进程池
    pool.map(main, (i * 10 for i in range(10)))  # 映射到主函数中进行循环