python抓取某城市全部道路名称信息

f = open('F:\\路名信息.json', 'w+')
#经纬度范围设置，按每次偏移两公里来移动检索圆心
for lat in np.arange(30.895038,31.424064,0.02):
        for long in np.arange(107.183609,107.800848,0.02):
            latstr=str(lat)
            longstr=str(long)
            bounds=latstr+','+longstr
            #query的参数值设为道路，检索半径设置为2公里
            api= "http://api.map.baidu.com/place/v2/search?query=道路&location={0}&radius=2000&output=json&ak={你的开发者秘钥}".format(bounds)
            r = requests.get(api, headers={'User-Agent': 'Mozilla/4.0 (compatible; MSIE 5.5; Windows NT)','Connection': 'close'}, timeout=(5, 5))
            try:
                result=r.json()
                #是否成功返回结果
                if result['status'] == 0:
                    #是否包含路况信息
                    results = result['results']
                    if len(results) != 0:
                        for road in results:
                              #每条路的json文件单独保存
                              print(json.dumps(road, ensure_ascii=False))
                              f.write(json.dumps(road, ensure_ascii=False,indent=4))

            except:
                print('哇塞，出错了')
                continue
f.close()

{
        "name": "踏水桥",
        "location": {
            "lat": 30.908352,
            "lng": 107.244304
        },
        "address": "四川省达州市大竹县",
        "province": "四川省",
        "city": "达州市",
        "area": "大竹县",
        "detail": 0,
        "uid": "ce658bf70958ecccda13183b"
},
{
        "name": "华农街/将军西街(路口)",
        "location": {
            "lat": 30.90876,
            "lng": 107.241049
        },
        "address": "达州市大竹县X168",
        "province": "四川省",
        "city": "达州市",
        "area": "大竹县",
        "detail": 1,
        "uid": "2355baab46ba127551e5c541"
},
{
        "name": "将军西街",
        "location": {
            "lat": 30.911387,
            "lng": 107.243157
        },
        "address": "四川省达州市大竹县",
        "province": "四川省",
        "city": "达州市",
        "area": "大竹县",
        "detail": 0,
        "uid": "09979f7c1c1aa5cb09f5eb47"
},
......