python实现：{ "network_scenarios": "sdn", "dataplanes_config": [ { "name": "default", "network_type": "DATAPLANE", "segmentation_type": "vxlan", "subnets": [ { "start": "166.166.16.10", "end": "166.166.16.166", "cidr": "166.166.16.0/24", "gateway": "", "vlan_id": "" }, { "start": "16.16.16.10", "end": "16.16.16.166", "cidr": "16.16.16.0/24", "gateway": "", "vlan_id": "" } ] } ], "host-192-168-103-110": { }, "host-192-168-103-111": { }, "sdn_manage_vswitch": "" }取以上内容中的“”subnets“为值，以“cidr”为键重新组成字典“””

可以使用如下Python代码实现：

data = {
    "network_scenarios": "sdn",
    "dataplanes_config": [
        {
            "name": "default",
            "network_type": "DATAPLANE",
            "segmentation_type": "vxlan",
            "subnets": [
                {
                    "start": "166.166.16.10",
                    "end": "166.166.16.166",
                    "cidr": "166.166.16.0/24",
                    "gateway": "",
                    "vlan_id": ""
                },
                {
                    "start": "16.16.16.10",
                    "end": "16.16.16.166",
                    "cidr": "16.16.16.0/24",
                    "gateway": "",
                    "vlan_id": ""
                }
            ]
        }
    ],
    "host-192-168-103-110": {},
    "host-192-168-103-111": {},
    "sdn_manage_vswitch": ""
}

subnets_dict = {}
for subnet in data["dataplanes_config"][0]["subnets"]:
    cidr = subnet["cidr"]
    subnets_dict[cidr] = subnet

print(subnets_dict)

输出结果为：

{'166.166.16.0/24': {'start': '166.166.16.10', 'end': '166.166.16.166', 'cidr': '166.166.16.0/24', 'gateway': '', 'vlan_id': ''}, '16.16.16.0/24': {'start': '16.16.16.10', 'end': '16.16.16.166', 'cidr': '16.16.16.0/24', 'gateway': '', 'vlan_id': ''}}

其中，`subnets_dict`即为以`cidr`为键重新组成的字典。