code: def rfftn(a, s=None, axes=None, norm=None):
      a = ivy.asarray(a, dtype=ivy.complex128)
      return ivy.rfftn(a, s=s, axes=axes, norm=norm)
  
file_path: ivy/ivy/functional/frontends/numpy/fft/discrete_fourier_transform.py
imports: import ivy
  from ivy.functional.frontends.numpy.func_wrapper import to_ivy_arrays_and_back
  from ivy.func_wrapper import with_unsupported_dtypes
label_desc: Use image node_id 12 for calling a global function with example usage: rfftn(a, s, axes, norm) and returns: ivy