code: def __init__(self, w_shape, ignore_label=None):
      self.w_shape = w_shape
      self.ignore_label = ignore_label
      self._gy_shape = None
  
imports: import chainer
  import numpy
  from chainer import cuda, function_node, link, variable
  from chainer.initializers import normal
  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)