code: def test_identity_invalid_shape(self):
      init = initializers.Identity()
      shape = (20,)
      with self.assertRaisesRegex(
          ValueError, "requires at least a 2D shape."
      ):
          init(shape, jnp.float32)
  
imports: import itertools
  from absl.testing import absltest
  from absl.testing import parameterized
  from haiku._src import initializers
  from haiku._src import test_utils
  import jax
  from jax import config
  import jax.numpy
  import numpy
label_desc: Use image node_id 7 for calling the InitializersTest obj's underlying member method code with example usage: obj.test_identity_invalid_shape() without return types