Inverse fast Fourier transform.

Parameters:x (tuple) – (real, imag) where real is a Variable storing the real part and imag is a Variable storing the imaginary part.
Returns:Returns (ry, ri) where ry is the real part of the result and ri is the imaginary part of the result.
Return type:tuple


Currently this function supports a tuple as input. It will support a complex numbers directly in the future.