class Device(object):
    """ Connects to a Cisco device through telnet """

    def __init__(self, host=None, password=None, username=None, enable_password=None):
        self.host = host
        self.username = username
        self.password = password
        self.enable_password = enable_password

        self.connected = False
        self._connection = None

        if self.username == '':
            self.username = None


    def connect(self, host=None, port=23, timeout=5):
        if host is None:
            host = self.host

        self._connection = telnetlib.Telnet(host, port, timeout)
        self._authenticate()
        self._get_hostname()

        self.cmd("term len 0")

        self.connected = True