code: def test_apply_variables_bad_pytree(self):
      def f(scope):
          scope.param("kernel", nn.initializers.ones_init(), (4,))
  
      params = freeze(
          {
              "params": {
                  "kernel": np.ones((4,)),
              },
          }
      )
      apply(f)(params)  # Valid.
      msg = "but got a dict with an extra params layer"
      with self.assertRaisesRegex(
          errors.ApplyScopeInvalidVariablesStructureError, msg
      ):
          apply(f)({"params": params})
  
imports: import jax
  import numpy
  from absl.testing import absltest
  from jax import numpy
  from jax import random
  from flax import errors
  from flax.configurations import temp_flip_flag
  from flax.core import Scope, apply, freeze, init, lazy_init, nn, scope
  from flax.core.scope import LazyRng
label_desc: Use image node_id 8 for calling the ScopeTest obj's underlying member method code with example usage: obj.test_apply_variables_bad_pytree() without return types