hosts = [
## Arista
    {
        "ip_address": "fc00:169:254:255::A",
        "nos": "arista-eos",
        "port": 57400,
        "username": "aaa",
        "password": "aaa"
    },
## Nokia
    {
        "ip_address": "169.254.255.11",
        "nos": "nokia-sros",
        "port": 57400,
        "username": "admin",
        "password": "admin"
    }
]