class_docstr: Unit tests for the LazyDotPytree class.
class_docstr_tok: ["Unit","tests","for","the","LazyDotPytree","class","."]
docstr: Test the __rmul__ method
docstr_tok: ["Test","the","__rmul__","method"]
code: def test_rmul(self):
      """Test the __rmul__ method"""
  
      coeffs = [1, 2, 3]
      ops = [qml.PauliX(0), qml.PauliY(0), qml.PauliZ(0)]
      mats = [qml.matrix(o) for o in ops]
      D = LazyDotPytree(coeffs=coeffs, mats=mats)
  
      assert isinstance(3 * D, LazyDotPytree)
      assert isinstance(D * 3, LazyDotPytree)
  
      with pytest.raises(TypeError, match="unsupported operand type"):
          _ = jnp.array([[1], [2]]) * D
  
file_path: pennylane/tests/pulse/test_parametrized_hamiltonian_pytree.py
imports: import numpy
  import pytest
  import pennylane
label_desc: Use image node_id 3 for calling the TestLazyDotPytree obj's underlying member method code with example usage: obj.test_rmul() without return types