code: def rfft2(a, s=None, axes=(-2, -1), norm=None):
      
  
      return rfftn(a, s, axes, norm)
docs: Compute the 2-dimensional FFT of a real array.
  
      Parameters
      ----------
      a : array
          Input array, taken to be real.
      s : sequence of ints, optional
          Shape of the FFT.
      axes : sequence of ints, optional
          Axes over which to compute the FFT.
      norm : {None, "ortho"}, optional
          .. versionadded:: 1.10.0
          Normalization mode (see `numpy.fft`). Default is None.
  
      Returns
      -------
      out : ndarray
          The result of the real 2-D FFT.
  
      See Also
      --------
      rfftn : Compute the N-dimensional discrete Fourier Transform for real
              input.
  
      Notes
      -----
      This is really just `rfftn` with different default behavior.
      For more details see `rfftn`.