network_device = {
    "ip_address": "172.1.1",
    "Vendor": "juniper",
    "username": "myuser",
    "password": "cisco234"
}

# print(network_device["ip_address"])


for key ,value in network_device.items():
        if key.casefold() == "vendor":
            if value.casefold() == "cisco":
                network_device.update({"plataform": "ios"})
            if value.casefold() == "juniper":
                network_device.update({"plataform": "junos"})