class Environment:
    """
    A wrapper object for the test environment.
    """
    def __init__(self, ip, browser, user='root', password='chr0n0s', radius_ip = "", tftp_ip = "", dhcp_ip = "", snmp_ip=""):
        self.ip = ip
        self.browser = browser
        self.user = user
        self.password = password

        # Empty IPs mean test suite will have to provision VMs as required.
        # You may nominate an IP if you have you own test machine.
        # Only IPs are required. Username and port is assumed.
        # TODO: make these services a list e.g. radius_ips = [ ]
        if self.radius_ip == "":
		    # provision radius vm
		def get_radius_ip:
		   return somehow radius ip

		 ....  and the same for other ips





###############################
in class TestUserAuthentication


in __init__
      self.environment.radius_ip = env.get_radius_ip