实例——查询天气

# -*- coding: utf-8 -*-
import requests

import sys
reload(sys)
sys.setdefaultencoding('utf8')

def get_weather_data():
    while True:
        city = raw_input('请输入您想查询的城市名称：')
        if city:
            break
    url = 'http://wthrcdn.etouch.cn/weather_mini?city=' + city
    r = requests.get(url)
    weather = r.json()
    if weather['desc'] == 'OK':
        print '城市：' + weather['data']['city']
        print '温度：' + weather['data']['wendu'] + '℃'
        print '感冒：' + weather['data']['ganmao']
        print '风向：' + weather['data']['forecast'][0]['fengxiang']
        print '风级：' + weather['data']['forecast'][0]['fengli']
        print '高温：' + weather['data']['forecast'][0]['high']
        print '低温：' + weather['data']['forecast'][0]['low']
        print '天气：' + weather['data']['forecast'][0]['type']
        print '日期：' + weather['data']['forecast'][0]['date']
        print '*' * 50
        while True:
            key = raw_input('是否显示未来四天的天气情况？（Y/N）')
            if key == 'Y':
                break
            elif key == 'N':
                exit()
        for i in range(1, 5):
            print '日期：' + weather['data']['forecast'][i]['date']
            print '风向：' + weather['data']['forecast'][i]['fengxiang']
            print '风级：' + weather['data']['forecast'][i]['fengli']
            print '高温：' + weather['data']['forecast'][i]['high']
            print '低温：' + weather['data']['forecast'][i]['low']
            print '天气：' + weather['data']['forecast'][i]['type']
            print('-' * 50)
    else:
        print '您输入的城市有误，或者天气中心未收录您输入的城市。'
        
if __name__ == '__main__':
    get_weather_data()