code: def dbus_readBytesTwoFDs(self, fd1, fd2, byte_count):
          
          result = bytearray()
          for fd in (fd1, fd2):
              f = os.fdopen(fd, 'rb')
              result.extend(f.read(byte_count))
              f.close()
          return result
docs: Reads byte_count from fd1 and fd2. Returns concatenation.