<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def dbus_readBytesTwoFDs(self, fd1, fd2, byte_count):
 """ Reads byte_count from fd1 and fd2. Returns concatenation. """

        result = bytearray()
        for fd in (fd1, fd2):
            f = os.fdopen(fd, 'rb')
            result.extend(f.read(byte_count))
            f.close()
        return result