Python通过读取网站信息以及BeautifulSoup解析获取到pm2.5数据

qwedc001

大家好，我是一个新人，文笔不好请多多指教。前几个月入手了一个树莓派，又买了一套拓展板，就是为了能学习一下Python编程。最近青岛雾霾比较猖狂，每天上网上查雾霾信息实在是太麻烦了。所以我干脆打算用Python抓取网站信息再显示到我的拓展板上（我只会展示获取PM2.5的代码的）。结果还真成功了。这个程序需要你安装BeautifulSoup来解析网站。简单的看了一下，aqi，pm2.5啥啥都可以获取到。简直是神器！
放一下获取Aqi的代码哈

[Python] 纯文本查看 复制代码

import urllib2
import time
from bs4 import BeautifulSoup
import re
def getPM25(cityname):
    site = 'http://www.pm25.com/city/' + cityname+'.html' 
    try:
        html = urllib2.urlopen(site)
        soup = BeautifulSoup(html,"html5lib")
        city = soup.find("span",{"class":"city_name"})
        aqi = soup.find("a",{"class":"cbol_aqi_num"})
        pm25 = soup.find("span",{"class":"cbol_nongdu_num_1"})
        pm25danwei = soup.find("span",{"class":"cbol_nongdu_num_2"})
        quality = soup.find("span",{"class":re.compile('cbor_gauge_level\d$')})
        result = soup.find("div",{"class":'cbor_tips'})
        replacechar = re.compile("<.*?>") 
        space = re.compile(" ")
        print city.string + " aqi = "+aqi.string
        return int(aqi.string)
    except Exception,e:
        print "catched exception"
        print e
        return -1
if __name__ == '__main__':  
    while True:
        aqi = getPM25('qingdao')#我是青岛人，所以是qingdao，假设你是北京人，你就输入beijing
        if aqi == -1:
            time.sleep(1)
            continue
        

luoky7

BeautifulSoup的确很强大，可结合selenium解析动态网页

CrazyNut

楼主还是努力学学这种基础吧= = 反汇编就放一边吧= =