城市经纬度(阿里云)

#encoding:UTF-8
#Python 3.4.3
import urllib
import requests
def get_info():
    city=input('请输入要查询的城市名称：')
    url='http://gc.ditu.aliyun.com/geocoding?a='+urllib.parse.quote(city)
    weather_data = urllib.request.urlopen(url).read()
    weather_data =eval(weather_data.decode('ascii'))
    print('城市:',city)
    print('经度:',weather_data.get('lon'))
    print('纬度:',weather_data.get('lat'))
    f=open('info.txt','a')
    f.writelines(str(city)+'  ')
    f.writelines(str(weather_data.get('lon'))+'  ')
    f.writelines(str(weather_data.get('lat'))+'  ')
    f.writelines("\n")
    f.close()
get_info()
while 1:
    choise = input('是否继续查询，是/否：').lower()
    if choise == "yes":
        get_info()
    elif choise == "no":
        break
    else:
        print ('enter "yes" or "no"')
        continue