code: def window_chebwin(N, attenuation=50):
      
      import scipy.signal
      return scipy.signal.chebwin(N, attenuation)
docs: Cheb window
  
      :param N: window length
  
      .. plot::
          :width: 80%
          :include-source:
  
          from spectrum import window_visu
          window_visu(64, 'chebwin', attenuation=50)
  
      .. seealso:: scipy.signal.chebwin, :func:`create_window`, :class:`Window`