1.一个简单的爬虫：爬取豆瓣的热门电影的信息
写在前面：如何创建本来存在的文件夹并写入
1 t_path = "d:/py/inn" #本来不存在inn，先定义路径，然后如果不存在，则创建目录，下面就能用了 2 if not os.path.exists(t_path): 3 os.makedirs(t_path) 4 f = open(r'd:/py/inn/info.txt','a')
技能：获取网页源码，正则表达式，函数调用，全局变量的定义
1 #! /usr/bin/env python 2 # -*- coding=utf-8 -*- 3 import requests 4 import json 5 import re 6 import sys 7 reload(sys) 8 sys.setdefaultencoding("utf-8") 9 classinfo = [] 10 f = open('info.txt','w') 11 12 num = 0 13 def write(htm): 14 titl = re.findall('data-tit(.*?)data-enough',htm.text,re.S) 15 for each in titl: 16 #print each 17 info = {} 18 #print each 19 info['title'] = re.search('le="(.*?)"',each,re.S).group(1) 20 info['year'] = re.search('data-release="(.*?)" data',each,re.S).group(1) 21 info['Rating']= re.findall('data-rate="(.*?)" data-star',each,re.S)[0] 22 info['time'] = re.findall('data-duration="(.*?)" data-re',each,re.S)[0] 23 info['reg'] = re.findall('data-region="(.*?)" data-dir',each,re.S)[0] 24 info['act'] = re.findall('data-actors="(.*?)" data-in',each,re.S)[0] 25 global num #全局的定义 26 num = num + 1 27 f.writelines('%d ' %num) 28 f.writelines(u'电影名：'+info['title'] + ' ') 29 f.writelines(u'主演：'+info['act'] + ' ') 30 f.writelines(u'电影地区：' + info['reg']+' ') 31 f.writelines(u'上映年份：' + info['year']+' ') 32 f.writelines(u'电影时长：' + info['time']+' ') 33 f.writelines(u'评分：' + info['Rating']+' ') 34 def getremen(): 35 # html = requests.get('http://movie.douban.com/') 36 url = 'http://movie.douban.com/' 37 html = requests.get(url) 38 html.encoding = 'utf-8' 39 # print html.text 40 write(html) 41 if __name__ == "__main__": 42 getremen()