code: def __init__(self, w_shape, ignore_label=None):
      self.w_shape = w_shape
      self.ignore_label = ignore_label
  
imports: import numpy
  import six
  import chainer
  from chainer import backend
  from chainer.backends import cuda
  from chainer import function_node
  from chainer import utils
  from chainer.utils import type_check
label_desc: Use image node_id 1 to create a new EmbedIDGrad object from inherited base classes: function_node with example: obj = EmbedIDGrad(w_shape, ignore_label)