用python写的抓取天气预报的脚本

用python写的抓取天气预报的脚本

http://blog.chinaunix.net/u2/82009/showart_2166843.html

 

从昨天开始的看关于网络抓取的东西，而且自己的用的是awesome ，所以写了这个天气预报的脚本给我的awesome，这个天气脚本直接取下来的话是七天的天气预报从中国天气网上，我后面对它做了处理，用到了我的awesome上
效果：1日星期一夜间 阴 低温 4℃ 无持续风向 微风 | 2日星期二 小雨 --> 雨夹雪 3℃ --> 6℃ | 3日星期三 雨夹雪 1℃ --> 5℃
我只取了三天的预报，三天已经够了，下面程序的注释 英文实在有点过不了关

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#!/usr/bin/env python
# weather html parser

from HTMLParser import HTMLParser
import sys,urllib2,string,re

# define a class to parser a html
class HtmlParser(HTMLParser):
    def __init__(self):
        self.data=''
        self.readingdata=0
        HTMLParser.__init__(self)

    def handle_starttag(self,tag,attrs):
        if tag == 'td':
            self.readingdata=1
    def handle_data(self,chars):
        if self.readingdata:
            self.data+=chars

    def handle_endtag(self,tag):
        if tag=='td':
            self.readingdata=0
    def cleanse(self):
        self.data = re.sub('/s+',' ', self.data)
    def getdata(self):
        self.cleanse()
        return self.data

# this url is a place where you want to know the weather forecast
url="http://www.weather.com.cn/html/weather/101210501.shtml"
req=urllib2.Request(url)
fd=urllib2.urlopen(req)
tp=HtmlParser()
tp.feed(fd.read())
weather=tp.getdata()
# when you are getting a weather after parsering
# this weather string have 7 days weather forecast
# the following if for my awesome format
weather=weather.split()
tag=[weather.index(i) for i in weather if '/xe6/x97/xa5' in i]
first=weather[:tag[1]]
second=weather[tag[1]:tag[2]]
if second[1]!=second[7]:second[1]+=' --> '+second[7]
second[2]=second[9]+' --> '+second[3]
second[0]=second[0][:-6]
second=second[:3]
third=weather[tag[2]:tag[3]]
if third[1]!=third[7]:third[1]+=' --> '+third[7]
third[2]=third[9]+' --> '+third[3]
third[0]=third[0][:-6]
third=third[:3]
weather=['    Weather:']+first+['|']+second+['|']+third
for i in weather:print i,