网址： http://maoyan.com/board/4?offset=01
爬取所有关键信息

#coding=utf-8
__author__ = 'zhujingwei'

import sys
reload(sys)
sys.setdefaultencoding('utf8')

import requests
from bs4 import BeautifulSoup
from requests.exceptions import RequestException
import json
import codecs
import os
from multiprocessing import Pool

def getOnePage(url):
    head = {'User-Agent':'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36'}
    try:
        response = requests.get(url,headers = head)
        response.encoding = 'utf-8'
        if response.status_code == 200:
            print(response.text)
            return response.text
        return None
    except RequestException:
        return None

def parseOnePage(html):
    indexsoup = BeautifulSoup(html,'html.parser')
    indexlist = indexsoup.select('.board-index') #index

    print(indexlist)

    #cover image
    imagelist = indexsoup.select('img[class="board-img"]')
    movienamelist = indexsoup.select('p[class="name"] > a[data-act="boarditem-click"]')
    print(movienamelist)

    moviestarlist = indexsoup.select('p[class="star"]')
    releasetimelist = indexsoup.select('p[class="releasetime"]')
    scorelist = indexsoup.select('p[class="score"]')

    resultlist = []

    for index in range(len(indexlist)):
        resultdict = {
            'index' : indexlist[index].text,
            'image' : imagelist[index].attrs['data-src'],
            'title' : movienamelist[index].text.strip(),
            'actor' : moviestarlist[index].text.strip().lstrip('主演：'),
            'time'  : releasetimelist[index].text.strip().lstrip('上映时间：'),
            'score' : scorelist[index].text
        }
        writeToFile(resultdict)
        resultlist.append(resultdict)
    return resultlist

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


def delete_file_folder(src):
    '''delete files and folders'''
    if os.path.isfile(src):
        try:
            os.remove(src)
        except:
            pass
    elif os.path.isdir(src):
        for item in os.listdir(src):
            itemsrc = os.path.join(src,item)
            delete_file_folder(itemsrc)
        try:
            os.rmdir(src)
        except:
            pass


def main(offset):

    url = 'http://maoyan.com/board/4?offset=0'+ str(offset)
    parseOnePage(getOnePage(url))


if __name__ == '__main__':
    delete_file_folder('result.txt')

    pool = Pool(processes = 10)
    pool.map(main,[i*10 for i in range(10)])
'''