python 实现自主查询实时天气

用到了urllib2 json  很简单的一个应用 如下 

      

获取城市编号

#coding=utf-8
import urllib2

url1 = 'http://m.weather.com.cn/data3/city.xml'
content1 = urllib2.urlopen(url1).read()
provinces = content1.split(',')
print content1 # 输出content1可以查看全部省份代码
result = ''
url = 'http://m.weather.com.cn/data3/city%s.xml'
for p in provinces:
    p_code = p.split('|')[0]
    url2 = url % p_code
    content2 = urllib2.urlopen(url2).read() # 输出content2可以查看此省份下所有城市代码
    cities = content2.split(',')
    print content2
    for c in cities:
        c_code = c.split('|')[0]
        url3 = url % c_code
        content3 = urllib2.urlopen(url3).read()
        print content3  #content3是此城市下所有地区代码
        districts = content3.split(',')
        for d in districts: # 对于每个地区，我们把它的名字记录下来，然后再发送一次请求，得到它的最终代码：
            d_pair = d.split('|')
            d_code = d_pair[0] #
            if 5 == len(d_code):
                continue
                temp=[d_code]
                temp.insert(4,0)
                d_code ="".join(temp)
            name = d_pair[1] # 名字
            url4 = url % d_code
            content4 = urllib2.urlopen(url4).read()
            print content4
            code = content4.split('|')[1]
            line = "%s:%s
" % (name, code)
            result += line
            print name + ':' + code
f = file('./city', 'w')
f.write(result)
f.close()

findweather

# -*- coding: utf-8 -*-
import urllib2
import json
city = {}
f =file('city','r')
src = f.readlines()
for line in src:
    line = line.split('
')[0]
    name = line.split(':')[0]
    code = line.split(':')[1]
    city[name] = code
cityname = raw_input('请输入你要查询的城市名称:
')
citycode = city.get(cityname)
print cityname
if citycode:
    try:
        url = ('http://www.weather.com.cn/data/cityinfo/%s.html' % citycode)
        content = urllib2.urlopen(url).read()
        data = json.loads(content)
        result = data['weatherinfo']
        str_temp = ('%s
%s ~ %s') % (result['weather'],result['temp1'],result['temp2'])
        print str_temp
    except:
        print '查询失败'
else:
    print '没有找到该城市'

运行 findweather 即可