<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def real_out_dtype(self):
 """The real dtype corresponding to this space's `out_dtype`."""

        if self.__real_out_dtype is None:
            raise AttributeError(
                'no real variant of output dtype {} defined'
                ''.format(dtype_repr(self.scalar_out_dtype)))
        else:
            return self.__real_out_dtype