Requests+正则表达式抓取猫眼电影TOP100

spider.py

# -*- coding:utf-8 -*-
import requests
import re
import json
import codecs
from requests.exceptions import RequestException
from multiprocessing import Pool

headers = {
    'User-Agent':'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.221 Safari/537.36 SE 2.X MetaSr 1.0'
}

def get_one_page(url):
    try:
        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('<dd>.*?board-index.*?>(d+)</i>.*?data-src="(.*?)".*?<a.*?>(.*?)</a>.*?star">(.*?)</p>.*?releasetime">(.*?)</p>.*?integer">(.*?)</i>.*?fraction">(.*?)</i>.*?</dd>', 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 save_to_file(content):
    with codecs.open('result.txt', 'a', 'utf-8') as f:
        f.write(json.dumps(content, ensure_ascii=False) + '
')

def main(offset):
    url = 'http://maoyan.com/board/4?offset=' + str(offset)
    html = get_one_page(url)
    for item in parse_one_page(html):
        print json.dumps(item, ensure_ascii=False, encoding='utf-8')
        save_to_file(item)

if __name__ == '__main__':
    pool = Pool()
    pool.map(main, [i*10 for i in range(10)])