code: def _generate_MAC(segments=6, segment_length=2, delimiter=":", charset="0123456789abcdef"):
          
          addr = []
          for _ in range(segments):
              sub = ''.join(random.choice(charset) for _ in range(segment_length))
              addr.append(sub)
          return delimiter.join(addr)
docs: generate a non-guaranteed-unique mac address