def mac_addr(address):
    """Convert a MAC address to a readable/printable string
       Args:
           address (str): a MAC address in hex form (e.g. '\x01\x02\x03\x04\x05\x06')
       Returns:
           str: Printable/readable MAC address
    """
    return ':'.join('%02x' % ord(b) for b in address)