class_docstr: Test that the class is intialized correctly.
class_docstr_tok: ["Test","that","the","class","is","intialized","correctly","."]
docstr: Test that a hamiltonian must have atleast 2 terms to be supported.
docstr_tok: ["Test","that","a","hamiltonian","must","have","atleast","2","terms","to","be","supported","."]
code: def test_error_hamiltonian(self):
      """Test that a hamiltonian must have atleast 2 terms to be supported."""
      msg = "There should be atleast 2 terms in the Hamiltonian."
      with pytest.raises(ValueError, match=msg):
          h = qml.Hamiltonian([1.0], [qml.PauliX(0)])
          qml.QDrift(h, 1.23, n=2, seed=None)
  
imports: import copy
  from functools import reduce
  import pytest
  import pennylane
  from pennylane import numpy
  from pennylane.math import allclose, isclose
  from pennylane.templates.subroutines.qdrift import _sample_decomposition
label_desc: Use image node_id 5 for calling the TestInitialization obj's underlying member method code with example usage: obj.test_error_hamiltonian() without return types