抓取猫眼电影简介

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

'''
Request+正则表达式抓取猫眼电影
'''

'''
获取第一页的内容
'''
def getOneContent(url,headers):
try:
 response = requests.get(url,headers=headers)
 if response.status_code == 200:
 return response.text
 return None
except RequestException:
 return None

'''
解析内容，根据正则表达式
'''
def parserContent(content):
if content:
 # pattern = re.compile('<dd.*?board-index.*?>(\d+).*?data-src="(.*?)".*?</a>.*?<a.*?data-val.*?>(.*?)</a>.*?star.*?>(.*?)'
 # +'.*?releasetime.*?>(.*?).*?integer.*?>(.*?).*?fraction.*?>(\d+).*?<dd>',re.S)

 # 字符串换行不需要添加“+”，上面这种写法是错误的。
 pattern = re.compile('<dd.*?board-index.*?>(\d+).*?data-src="(.*?)".*?</a>.*?<a.*?data-val.*?>(.*?)</a>.*?star.*?>(.*?).*?releasetime.*?>(.*?)'
 '.*?integer.*?>(.*?).*?fraction.*?>(\d+).*?</dd>',re.S)
 results = re.findall(pattern,content)
 # print(results)
 return results

def processData(results):
for result in results:
 yield {
 'index':result[0],
 'imgurl':result[1],
 'name':result[2],
 'star':result[3].strip()[3:],
 'releasetime':result[4].strip()[5:],
 'score':result[5]+result[6]
 }
 # print(result)

def storeData(data):
'''
为了防止出现unicode码
:param data: 需要写入文本的数据
:return: 无返回值
'''
with open("mmovie.txt",'a',encoding='utf-8') as f:
 f.write(json.dumps(data,ensure_ascii=False)+'\n')
 f.close()

def main(offset):
url = 'http://maoyan.com/board/4?offset='+str(offset)
headers = {'User-Agent':'Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.167 Safari/537.36'}
html = getOneContent(url,headers=headers)
# print(html)
results = parserContent(html)
for item in processData(results):
 storeData(item)

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

首发：传智播客人工智能+pathon培训学院
作者：http://python.itcast.cn/

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