class_docstr: Unit tests for the ParametrizedHamiltonianPytree class.
class_docstr_tok: ["Unit","tests","for","the","ParametrizedHamiltonianPytree","class","."]
docstr: Test the tree_unflatten method.
docstr_tok: ["Test","the","tree_unflatten","method","."]
code: def test_unflatten_method(self, H, fn):
      """Test the tree_unflatten method."""
      H_pytree = ParametrizedHamiltonianPytree.from_hamiltonian(
          H, dense=False, wire_order=[2, 3, 1, 0]
      )
  
      flat_tree = H_pytree.tree_flatten()
  
      new_H_pytree = H_pytree.tree_unflatten(
          flat_tree[1], flat_tree[0], flat_tree[2]
      )
  
      assert new_H_pytree.mat_fixed == H_pytree.mat_fixed
      assert (
          new_H_pytree.mats_parametrized == H_pytree.mats_parametrized
      )
      assert (
          new_H_pytree.coeffs_parametrized
          == H_pytree.coeffs_parametrized
      )
      assert new_H_pytree.reorder_fn == fn
  
file_path: pennylane/tests/pulse/test_parametrized_hamiltonian_pytree.py
imports: import numpy
  import pytest
  import pennylane
label_desc: Use image node_id 5 for calling the TestParametrizedHamiltonianPytree obj's underlying member method code with example usage: obj.test_unflatten_method(H, fn) without return types