class_docstr: Test the Pauli expectation value function
docstr: Test that the output is 0 if the Pauli word is not present in the recipes
code: def test_word_not_present(self, word, interface):
      """Test that the output is 0 if the Pauli word is not present in the recipes"""
      bits = convert_to_interface(np.array([[0, 0, 0]]), interface)
      recipes = convert_to_interface(np.array([[0, 0, 0]]), interface)
  
      actual = pauli_expval(bits, recipes, np.array([word]))
      assert actual.shape == (1, 1)
      assert actual[0][0] == 0
  
imports: import pytest
  import numpy
  import pennylane
  import pennylane.numpy
  from pennylane.shadows import ClassicalShadow, median_of_means, pauli_expval
label_desc: Use image node_id 1 for calling the TestPauliExpval obj's underlying member method code with example usage: obj.test_word_not_present(word, interface) without return types