code: def irfftn(a, s, axes=None):
      
  
      return pyfftw.interfaces.numpy_fft.irfftn(
          a, s=s, axes=axes, overwrite_input=False,
          planner_effort='FFTW_MEASURE', threads=pyfftw_threads)
docs: Compute the inverse of the multi-dimensional discrete Fourier transform
      for real input. This function is a wrapper for
      :func:`pyfftw.interfaces.numpy_fft.irfftn`, with an interface similar to
      that of :func:`numpy.fft.irfftn`.
  
      Parameters
      ----------
      a : array_like
        Input array
      s : sequence of ints
        Shape of the output along each transformed axis (input is cropped or
        zero-padded to match). This parameter is not optional because, unlike
        :func:`ifftn`, the output shape cannot be uniquely determined from
        the input shape.
      axes : sequence of ints, optional (default None)
        Axes over which to compute the inverse DFT.
  
      Returns
      -------
      af : ndarray
        Inverse DFT of input array