class_docstr: Test the TensorFlow interface execute function
  integrates well for both forward and backward execution
class_docstr_tok: ["Test","the","TensorFlow","interface","execute","function","integrates","well","for","both","forward","and","backward","execution"]
docstr: Test that a tape with no parameters is correctly
  ignored during the gradient computation
docstr_tok: ["Test","that","a","tape","with","no","parameters","is","correctly","ignored","during","the","gradient","computation"]
code: def test_tape_no_parameters(self, execute_kwargs, tol):
      """Test that a tape with no parameters is correctly
      ignored during the gradient computation"""
      dev = qml.device("default.qubit.legacy", wires=1)
      params = tf.Variable([0.1, 0.2], dtype=tf.float64)
      x, y = 1.0 * params
  
      with tf.GradientTape() as t:
          with qml.queuing.AnnotatedQueue() as q1:
              qml.Hadamard(0)
              qml.expval(qml.PauliX(0))
  
          tape1 = qml.tape.QuantumScript.from_queue(q1)
          with qml.queuing.AnnotatedQueue() as q2:
              qml.RY(0.5, wires=0)
              qml.expval(qml.PauliZ(0))
  
          tape2 = qml.tape.QuantumScript.from_queue(q2)
          with qml.queuing.AnnotatedQueue() as q3:
              qml.RY(params[0], wires=0)
              qml.RX(params[1], wires=0)
              qml.expval(qml.PauliZ(0))
  
          tape3 = qml.tape.QuantumScript.from_queue(q3)
          res = sum(
              execute([tape1, tape2, tape3], dev, **execute_kwargs)
          )
          res = tf.stack(res)
  
      expected = 1 + np.cos(0.5) + np.cos(x) * np.cos(y)
      assert np.allclose(res, expected, atol=tol, rtol=0)
  
      grad = t.gradient(res, params)
      expected = [-np.cos(y) * np.sin(x), -np.cos(x) * np.sin(y)]
      assert np.allclose(grad, expected, atol=tol, rtol=0)
  
imports: import numpy
  import pytest
  import pennylane
  from pennylane.gradients import finite_diff, param_shift
  from pennylane import execute
label_desc: Use image node_id 4 for calling the TestTensorFlowExecuteIntegration obj's underlying member method code with example usage: obj.test_tape_no_parameters(execute_kwargs, tol) without return types