class_docstr: Fast Fourier transform.
class_docstr_tok: ["Fast","Fourier","transform","."]
code: def check_type_forward(self, in_types):
      type_check._argname(in_types, ("real", "imag"))
      r_type, i_type = in_types
      type_check.expect(
          r_type.dtype.kind == "f",
          r_type.ndim > 0,
          r_type.shape == i_type.shape,
          r_type.dtype == i_type.dtype,
      )
  
file_path: chainer/chainer/functions/math/fft.py
imports: from chainer import backend
  from chainer import function_node
  from chainer.utils import type_check
label_desc: Use image node_id 2 for calling the FFT obj's underlying member method code with example usage: obj.check_type_forward(in_types) without return types