记一次简单爬虫(豆瓣/dytt)

 

磕磕绊绊学python一个月,这次到正则表达式终于能写点有趣的东西,在此作个记录:

 

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1.爬取豆瓣电影榜前250名单

 

运行环境:

pycharm-professional-2018.2.4

3.7.0 (v3.7.0:1bf9cc5093, Jun 27 2018, 04:59:51) [MSC v.1914 64 bit (AMD64)]   

 

成品效果:

 

相关代码:

 1 from urllib.request import urlopen
 2 import re
 3 # import ssl  # 若有数字签名问题可用
 4 # ssl._create_default_https_context = ssl._create_unverified_context
 5 
 6 
 7 # 写正则规则
 8 obj = re.compile(r'<div class="item">.*?<span class="title">(?P<name>.*?)</span>.*?导演:(?P<daoyan>.*?)&nbsp;.*?'
 9                  r'主演:(?P<zhuyan>.*?)<br>\n                            (?P<shijian>.*?)&nbsp;/&nbsp;(?P<diqu>.*?)&nbsp;'
10                  r'/&nbsp;(?P<leixing>.*?)\n.*?<span class="rating_num" property="v:average">(?P<fen>.*?)</span>.*?<span>'
11                  r'(?P<renshu>.*?)评价</span>.*?<span class="inq">(?P<jianping>.*?)</span>',re.S)  # re.S 干掉换行
12 
13 # 转码 获取内容
14 def getContent(url):
15     content = urlopen(url).read().decode("utf-8")
16     return content
17 
18 # 匹配页面内容 返回一个迭代器
19 def parseContent(content):
20     iiter = obj.finditer(content)
21     for el in iiter:
22         yield {
23             "name":el.group("name"),
24             "daoyan":el.group("daoyan"),
25             "zhuyan":el.group("zhuyan"),
26             "shijian":el.group("shijian"),
27             "diqu":el.group("diqu"),
28             "leixing":el.group("leixing"),
29             "fen":el.group("fen"),
30             "renshu":el.group("renshu"),
31             "jianping":el.group("jianping")
32         }
33 
34 
35 for i in range(10):
36     url = "https://movie.douban.com/top250?start=%s&filter=" % (i*25)  # 循环页面10
37     print(url)
38     g = parseContent(getContent(url))  # 匹配获取的内容返回给g
39     f = open("douban_movie.txt",mode="a",encoding="utf-8")
40     for el in g:
41         f.write(str(el)+"\n")  # 写入到txt 注意加上换行
42 
43     # f.write("==============================================")  # 测试分页
44     f.close()

 

 

2.爬取某站最新电影和下载地址

 

运行环境:

pycharm-professional-2018.2.4

3.7.0 (v3.7.0:1bf9cc5093, Jun 27 2018, 04:59:51) [MSC v.1914 64 bit (AMD64)]   

 

成品效果:

 

相关代码:

 1 from urllib.request import urlopen
 2 import json
 3 import re
 4 
 5 # 获取主页面内容
 6 url = "https://www.dytt8.net/"
 7 content = urlopen(url).read().decode("gbk")
 8 # print(content)
 9 
10 # 正则
11 obj = re.compile(r'.*?最新电影下载</a>]<a href=\'(?P<url1>.*?)\'>', re.S)
12 obj1 = re.compile(r'.*?<div id="Zoom">.*?<br />◎片  名(?P<name>.*?)<br />.*?bgcolor="#fdfddf"><a href="(?P<download>.*?)">', re.S)
13 
14 
15 def get_content(content):
16     res = obj.finditer(content)
17     f = open('movie_dytt.json', mode='w', encoding='utf-8')
18     for el in res:
19         res = el.group("url1")
20         res = url + res  # 拼接子页面网址
21 
22         content1 = urlopen(res).read().decode("gbk")  # 获取子页面内容
23         lst = obj1.findall(content1)  # 匹配obj1返回一个列表
24         # print(lst)  # 元组
25         name = lst[0][0]
26         download = lst[0][1]
27         s = json.dumps({"name":name,"download":download},ensure_ascii=False)
28         f.write(s+"\n")
29     f.flush()
30     f.close()
31 
32 
33 get_content(content)  # 调用函数 执行

 

posted @ 2018-11-19 19:55  刹那灯火明  阅读(1016)  评论(0编辑  收藏  举报