复杂的json数据怎么像python一样读取啊

{
    "PageNumber": 1,
    "TotalCount": 1,
    "PageSize": 10,
    "RequestId": "8DADF6F2-3C20-40A4-B48F-8EE675AD68BB",
    "Instances": {
        "Instance": [{
            "InnerIpAddress": {
                "IpAddress": []
            },
            "ImageId": "m-28ll479ky",
            "InstanceTypeFamily": "ecs.xn4",
            "VlanId": "",
            "NetworkInterfaces": {
                "NetworkInterface": [{
                    "MacAddress": "00:16:3e:05:a3:ef",
                    "PrimaryIpAddress": "192.168.0.131",
                    "NetworkInterfaceId": "eni-m5e6niist70q5667h5nn"
                }]
            },
            "InstanceId": "i-m5ebz1ckaqt75fnzcy9a",
            "EipAddress": {
                "IpAddress": "",
                "AllocationId": "",
                "InternetChargeType": ""
            },
            "InternetMaxBandwidthIn": 500,
            "ZoneId": "cn-qingdao-b",
            "InternetChargeType": "PayByBandwidth",
            "SpotStrategy": "NoSpot",
            "StoppedMode": "Not-applicable",
            "SerialNumber": "3952c3fa-ad4d-4e41-a351-32009ee83901",
            "IoOptimized": true,
            "Memory": 1024,
            "Cpu": 1,
            "VpcAttributes": {
                "NatIpAddress": "",
                "PrivateIpAddress": {
                    "IpAddress": ["192.168.0.131"]
                },
                "VSwitchId": "vsw-m5ev7fvxpi6tno400qxpw",
                "VpcId": "vpc-m5ebc02fkbkrspyt1fwpg"
            },
            "InternetMaxBandwidthOut": 1,
            "DeviceAvailable": true,
            "SecurityGroupIds": {
                "SecurityGroupId": ["sg-m5eb5k5bjprzv1i1hu5t"]
            },
            "SaleCycle": "",
            "SpotPriceLimit": 0.0,
            "AutoReleaseTime": "",
            "StartTime": "2018-04-16T08:26Z",
            "InstanceName": "iZm5ebz1ckaqt75fnzcy9aZ",
            "Description": "",
            "ResourceGroupId": "",
            "OSType": "linux",
            "OSName": "CentOS  6.5 64位",
            "InstanceNetworkType": "vpc",
            "PublicIpAddress": {
                "IpAddress": ["47.104.82.179"]
            },
            "HostName": "iZm5ebz1ckaqt75fnzcy9aZ",
            "InstanceType": "ecs.xn4.small",
            "CreationTime": "2018-04-16T08:25Z",
            "Status": "Running",
            "ClusterId": "",
            "Recyclable": false,
            "RegionId": "cn-qingdao",
            "GPUSpec": "",
            "OperationLocks": {
                "LockReason": []
            },
            "InstanceChargeType": "PostPaid",
            "GPUAmount": 0,
            "ExpiredTime": "2999-09-08T16:00Z"
        }]
    }
}

这个是调阿里api，返回的数据，我怎么才能任意访问里面的数据, 例如我想获取 这个ip地址"IpAddress": ["47.104.82.179"]

尝试使用以下方法，但这个貌似只是打印，没能访问我要的具体值

func print_json(m map[string]interface{}) {
    for k, v := range m {
        switch vv := v.(type) {
        case string:
            fmt.Println(k, "is string", vv)
        case float64:
            fmt.Println(k, "is float", int64(vv))
        case int:
            fmt.Println(k, "is int", vv)
        case []interface{}:
            fmt.Println(k, "is an array:")
            for i, u := range vv {
                fmt.Println(i, u)
            }
        case nil:
            fmt.Println(k, "is nil", "null")
        case map[string]interface{}:
            fmt.Println(k, "is an map:")
            print_json(vv)
        default:
            fmt.Println(k, "is of a type I don't know how to handle ", fmt.Sprintf("%T", v))
        }
    }
}

而且打印结果是这样的。。。

PageNumber is float 1
TotalCount is float 1
PageSize is float 10
RequestId is string D9CA05B0-96B4-43AB-9AAC-77E15A60B4AF
Instances is an map:
Instance is an array:
0 map[IoOptimized:true Memory:1024 SaleCycle: CreationTime:2018-04-16T08:25Z ImageId:m-28ll479ky InternetChargeType:PayByBandwidth OSName:CentOS  6.5 64位 ZoneId:cn-qingdao-b SecurityGroupIds:map[SecurityGroupId:[sg-m5eb5k5bjprzv1i1hu5t]] SpotPriceLimit:0 InstanceName:iZm5ebz1ckaqt75fnzcy9aZ InstanceNetworkType:vpc Status:Running ClusterId: OperationLocks:map[LockReason:[]] InstanceTypeFamily:ecs.xn4 SpotStrategy:NoSpot InternetMaxBandwidthOut:1 StartTime:2018-04-16T08:26Z OSType:linux GPUSpec: GPUAmount:0 EipAddress:map[IpAddress: AllocationId: InternetChargeType:] InternetMaxBandwidthIn:500 VpcAttributes:map[NatIpAddress: PrivateIpAddress:map[IpAddress:[192.168.0.131]] VSwitchId:vsw-m5ev7fvxpi6tno400qxpw VpcId:vpc-m5ebc02fkbkrspyt1fwpg] RegionId:cn-qingdao VlanId: StoppedMode:Not-applicable Cpu:1 Description: InstanceType:ecs.xn4.small NetworkInterfaces:map[NetworkInterface:[map[MacAddress:00:16:3e:05:a3:ef PrimaryIpAddress:192.168.0.131 NetworkInterfaceId:eni-m5e6niist70q5667h5nn]]] InstanceId:i-m5ebz1ckaqt75fnzcy9a PublicIpAddress:map[IpAddress:[47.104.82.179]] Recyclable:false InstanceChargeType:PostPaid ExpiredTime:2999-09-08T16:00Z InnerIpAddress:map[IpAddress:[]] DeviceAvailable:true AutoReleaseTime: ResourceGroupId: HostName:iZm5ebz1ckaqt75fnzcy9aZ SerialNumber:3952c3fa-ad4d-4e41-a351-32009ee83901]