【python练手】获取城市天气质量

#!/usr/bin/python
# -*- coding: utf-8 -*-
# get city pm2.5 and ranking
# python2.7

import sys
import urllib2
# import threading
from time import ctime
from bs4 import BeautifulSoup

def get_pm25(cityname):
	site = 'http://www.pm25.com/' + cityname + '.html'
	html = urllib2.urlopen(site)
	soup = BeautifulSoup(html,'html.parser')

	city = soup.find(class_ = 'bi_loaction_city') # city_name
	aqi = soup.find("a", {"class", "bi_aqiarea_num"}) # AQI index
	quality = soup.select(".bi_aqiarea_right span") # area quality
	result = soup.find("div", class_ = 'bi_aqiarea_bottom') # air description
	# print city.text
	print city.text + u'AQI Index: ' + aqi.text + u'\nAir quality: ' + quality[0].text + result.text
	print '*'*20 + ctime() + '*'*20

if __name__ == '__main__':
	#get_pm25('shenzhen') 
	if 1 == len(sys.argv):
		print "usage: ./get_pm25.py beijing guangzhou ..."
	for i in range(1, len(sys.argv)):
		get_pm25(sys.argv[i])

执行结果：