variable "amis_in" {
    type = "map"
    default = {
        "us-west-1" = "ami-123456"
        "us-west-2" = "ami-456789"
        "eu-west-1" = "ami-789012"
        "eu-west-2" = "ami-989484"
    }
}

module "test" {
    source = "./amodule"

    amis = "${var.amis_in}"
}

output "amis_from_module" {
    value = "${module.test.amis_out}"
}