code: def __init__(self, out_shape, offset, axis1, axis2):
      self.out_shape = out_shape
      self.offset = offset
      self.axis1 = axis1
      self.axis2 = axis2
  
file_path: chainer/chainer/functions/array/diagonal.py
imports: import numpy
  from chainer import backend
  from chainer import function_node
  from chainer.utils import type_check
label_desc: Use image node_id 1 to create a new DiagonalGrad object from inherited base classes: function_node with example: obj = DiagonalGrad(out_shape, offset, axis1, axis2)