利用百度Api将经纬度转地址时，出现“ KeyError: 'result' ”怎么解决

代码如下：

from bs4 import BeautifulSoup
import requests
import json
lat1 = np.array(df2['经度'])
lng1 = np.array(df2['纬度'])

address1 = []
for i in range(len(lat1)):
    AK = 'tBB0SG06vj3MWDjHj7X1shMxXVgvZOCm'
    url = 'http://api.map.baidu.com/reverse_geocoding/v3/?ak={}&output=json&coordtype=wgs84ll&location={},{}'.format(AK,lat1[i],lng1[i])
    res = requests.get(url)
    address_ = json.loads(res.text)['result']['formatted_address']
    address1.append(address_)

res = requests.get(url)
print(res.text)#打印内容看下，应该是缺少参数或者不正确导致返回了错误信息，没有result属性。根据返回的错误看下api需要什么参数