python并发编程-爬虫

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import re
from urllib.request import urlopen
from multiprocessing import Pool

def get_page(url,pattern):
    response=urlopen(url).read().decode('utf-8')
    return pattern,response   # 正则表达式编译结果 网页内容

def parse_page(info):
    pattern,page_content=info
    res=re.findall(pattern,page_content)
    for item in res:
        dic={
            'index':item[0].strip(),
            'title':item[1].strip(),
            'actor':item[2].strip(),
            'time':item[3].strip(),
        }
        print(dic)
if __name__ == '__main__':
    regex = r'<dd>.*?<.*?class="board-index.*?>(\d+)</i>.*?title="(.*?)".*?class="movie-item-info".*?<p class="star">(.*?)</p>.*?<p class="releasetime">(.*?)</p>'
    pattern1=re.compile(regex,re.S)
    url_dic={'http://maoyan.com/board/7':pattern1}
    p=Pool()
    res_l=[]
    for url,pattern in url_dic.items():
        res=p.apply_async(get_page,args=(url,pattern),callback=parse_page)
        res_l.append(res)

    for i in res_l:
        i.get()