如何使用Python在Redis中存储复杂的嵌套JSON

Question

由于我是Redis的新手，因此我需要一些有关如何在REDIS中存储以下复杂json的指导，以便我们可以从REDIS中访问JSON的元素-

"Reservations": [
        {
            "Instances": [
                {
                    "Monitoring": {
                        "State": "disabled"
                    },
                    "PublicDnsName": "",
                    "State": {
                        "Code": 16,
                        "Name": "running"
                    },
                    "EbsOptimized": "false",
                    "LaunchTime": "xxxxxxxxx",
                    "PrivateIpAddress": "x.x.x.x",
                    "ProductCodes": [],
                    "VpcId": "xxxxx",
                    "StateTransitionReason": "",
                    "InstanceId": "i-xxxxxxx",
                    "EnaSupport": "true",
                    "ImageId": "ami-xxxxx",
                    "PrivateDnsName": "ip-xxxxxx.ec2.internal",
                    "KeyName": "xxxxxxv",
                    "SecurityGroups": [
                        {
                            "GroupName": "xxx",
                            "GroupId": "sg-xxxx"
                        },
                        {
                            "GroupName": "xxxxxx",
                            "GroupId": "sg-xxxxx"
                        },
                        {
                            "GroupName": "xxxxx",
                            "GroupId": "sg-xxxxxx"
                        },
                        {
                            "GroupName": "xxxxx",
                            "GroupId": "sg-xxxxxx"
                        }
                    ],
                    "ClientToken": "xxxxx",
                    "SubnetId": "subnet-xxxxx",
                    "InstanceType": "t2.micro",
                    "NetworkInterfaces": [
                        {
                            "Status": "in-use",
                            "MacAddress": "xxxxxxxx",
                            "SourceDestCheck": "true",
                            "VpcId": "vpc-xxxxx",
                            "Description": "",
                            "NetworkInterfaceId": "eni-xxxxx",
                            "PrivateIpAddresses": [
                                {
                                    "PrivateDnsName": "ip-xx-ec2.internal",
                                    "Primary": "true",
                                    "PrivateIpAddress": "xxxxx"
                                }
                            ],
                            "PrivateDnsName": "ip-xxxx-xx.ec2.internal",
                            "Attachment": {
                                "Status": "attached",
                                "DeviceIndex": 0,
                                "DeleteOnTermination": "true",
                                "AttachmentId": "eni-attach-xxxxx",
                                "AttachTime": "2017-0xxxxx"
                            },
                            "Groups": [
                                {
                                    "GroupName": "xx",
                                    "GroupId": "sg-xxxx"
                                },
                                {
                                    "GroupName": "xxxx",
                                    "GroupId": "sg-xxx"
                                },
                                {
                                    "GroupName": "xxxx",
                                    "GroupId": "sg-xxx"
                                },
                                {
                                    "GroupName": "xxxx",
                                    "GroupId": "sg-xxxx"
                                }
                            ],
                            "Ipv6Addresses": [],
                            "OwnerId": "xxx",
                            "SubnetId": "subnet-xxxx",
                            "PrivateIpAddress": "1xxxx"
                        }
                    ],
                    "SourceDestCheck": "true",
                    "Placement": {
                        "Tenancy": "default",
                        "GroupName": "",
                        "AvailabilityZone": "us-xxxxxxx"
                    },
                    "Hypervisor": "xen",
                    "BlockDeviceMappings": [
                        {
                            "DeviceName": "/dev/xxxxxx",
                            "Ebs": {
                                "Status": "attached",
                                "DeleteOnTermination": "true",
                                "VolumeId": "vol-xxxxxx",
                                "AttachTime": "2017-xxxxxxx"
                            }
                        }
                    ],
                    "Architecture": "x86_64",
                    "RootDeviceType": "ebs",
                    "IamInstanceProfile": {
                        "Id": "xxxxxxxx",
                        "Arn": "arn:aws:iam::xxxxxxx"
                    },
                    "RootDeviceName": "/dev/xxxxx",
                    "VirtualizationType": "hvm",
                    "Tags": [
                        {
                            "Value": "xxxxxx",
                            "Key": "aws:cloudformation:stack-name"
                        },
                        {
                            "Value": "xxxxxxx",
                            "Key": "aws:cloudformation:logical-id"
                        },
                        {
                            "Value": "arn:aws:cloudformation:xxxxxx",
                            "Key": "aws:cloudformation:stack-id"
                        }
                    ],
                    "AmiLaunchIndex": 0
                }
            ],
            "ReservationId": "r-xxxxx",
            "RequesterId": "xxxxx",
            "Groups": [],
            "OwnerId": "xxxxxx"
        }
    ] 
}

我需要以一种查询IP /主机名/ InstanceID的方式来存储它，以获取JSON中存在的所有元素。

我需要上述指导。

Answer 1

您无法直接做到这一点，但是幸运的是，有一个名为ReJSON的新Redis模块可以完全满足您的需求，并且它还具有不错的Python绑定。您需要使用redis
4.0，然后编译并安装ReJSON并配置redis来加载它，并且它添加了用于JSON操作的本机命令。

它使您可以将JSON文档存储在redis中，然后获取或修改文档树中的特定元素，而无需检索（或在内部甚至解析）该文档。它的Python客户端甚至允许您存储python字典并将其自动转换为JSON。

ReJSON模块：http：//rejson.io

Python客户端：https：//pypi.python.org/pypi/rejson

例：

from rejson import Client, Path

rj = Client(host='localhost', port=6379)

# Set the key `obj` to some object
obj = {
    'answer': 42,
    'arr': [None, True, 3.14],
    'truth': {
        'coord': 'out there'
    }
}
rj.jsonset('obj', Path.rootPath(), obj)

# Get something
print 'Is there anybody... {}?'.format(
    rj.jsonget('obj', Path('.truth.coord'))
)