code: def pyfftw_rfftn_empty_aligned(shape, axes, dtype, order='C', n=None):
      
  
      ashp = list(shape)
      raxis = axes[-1]
      ashp[raxis] = ashp[raxis] // 2 + 1
      cdtype = complex_dtype(dtype)
      return pyfftw.empty_aligned(ashp, cdtype, order, n)
docs: Construct an empty byte-aligned array for efficient use by :mod:`pyfftw`
      functions :func:`pyfftw.interfaces.numpy_fft.rfftn` and
      :func:`pyfftw.interfaces.numpy_fft.irfftn`. The shape of the
      empty array is appropriate for the output of
      :func:`pyfftw.interfaces.numpy_fft.rfftn` applied
      to an array of the shape specified by parameter `shape`, and for the
      input of the corresponding :func:`pyfftw.interfaces.numpy_fft.irfftn`
      call that reverses this operation.
  
      Parameters
      ----------
      shape : sequence of ints
        Output array shape
      axes : sequence of ints
        Axes on which the FFT will be computed
      dtype : dtype
        Real dtype from which the complex dtype of the output array is derived
      order : {'C', 'F'}, optional (default 'C')
        Specify whether arrays should be stored in row-major (C-style) or
        column-major (Fortran-style) order
      n : int, optional (default None)
        Output array should be aligned to n-byte boundary
  
      Returns
      -------
      a :  ndarray
        Empty array with required byte-alignment