code: def test_real_fft_axis0(self, xp, scp):
      x = testing.shaped_random(self.shape, xp, self.dtype)
      if x.dtype.kind == "c":
          # skip: can't use rfft on complex-valued x
          return x
      return self._test_real_nd(xp, scp, x, 0)
  
imports: import cupy
  import numpy
  import pytest
  from cupy import testing
  import cupyx.scipy.fft
  import cupyx.scipy.fftpack
  import cupyx.scipy.ndimage
label_desc: Use image node_id 2 for calling the TestFourierGaussian obj's underlying member method code with example usage: obj.test_real_fft_axis0(xp, scp) and returns: self, x