code: def istype(arr, typeclass):
      return issubclass(arr.dtype.type, typeclass)
  
imports: from __future__ import division, print_function, absolute_import
  from numpy import swapaxes, zeros
  import numpy
  from .None import _fftpack
  from scipy.fftpack.helper import _init_nd_shape_and_axes_sorted
  import atexit
label_desc: Use image node_id 1 for calling a global function with example usage: istype(arr, typeclass) and returns: issubclass