code: def _is_pauli_word(observable):  # pylint:disable=unused-argument
      """
      Private implementation of is_pauli_word, to prevent all of the
      registered functions from appearing in the Sphinx docs.
      """
      return False
  
imports: from functools import lru_cache, reduce, singledispatch
  from itertools import product
  from typing import List, Union
  from warnings import warn
  import numpy
  import pennylane
  from pennylane.operation import Tensor
  from pennylane.ops import Hamiltonian, Identity, PauliX, PauliY, PauliZ, Prod, SProd
  from pennylane.tape import OperationRecorder
  from pennylane.wires import Wires
label_desc: Use image node_id 3 for calling a global function with example usage: _is_pauli_word(observable) and returns: False