code: def _ifft_grad(_, grad):
      rsize = _math_ops.cast(
          1.0
          / _math_ops.cast(
              _fft_size_for_grad(grad, 1), grad.dtype.real_dtype
          ),
          grad.dtype,
      )
      return fft(grad) * rsize
  
imports: import re
  import numpy
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import tensor_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import array_ops_stack
  from tensorflow.python.ops import gen_spectral_ops
  from tensorflow.python.ops import manip_ops
  from tensorflow.python.ops import math_ops
  from tensorflow.python.util import dispatch
  from tensorflow.python.util.tf_export import tf_export
label_desc: Use image node_id 16 for calling a global function with example usage: _ifft_grad(_, grad) and returns: unknown