code: def check_initializer(self, w):
      initializer = initializers.Identity(scale=self.scale)
      initializer(w)
      testing.assert_allclose(
          w,
          self.scale * numpy.identity(len(self.shape)),
          **self.check_options,
      )
  
imports: import unittest
  import numpy
  import chainer
  from chainer import backend
  from chainer import initializers
  from chainer import testing
label_desc: Use image node_id 2 for calling the TestIdentity obj's underlying member method code with example usage: obj.check_initializer(w) without return types