class_docstr: Test the new VQE syntax of passing the Hamiltonian as an observable.
class_docstr_tok: ["Test","the","new","VQE","syntax","of","passing","the","Hamiltonian","as","an","observable","."]
docstr: Test that the specs of a VQE circuit can be computed
docstr_tok: ["Test","that","the","specs","of","a","VQE","circuit","can","be","computed"]
code: def test_specs(self):
      """Test that the specs of a VQE circuit can be computed"""
      dev = qml.device("default.qubit", wires=2)
      H = qml.Hamiltonian(
          [0.1, 0.2], [qml.PauliZ(0), qml.PauliZ(0) @ qml.PauliX(1)]
      )
  
      @qml.qnode(dev)
      def circuit():
          qml.Hadamard(wires=0)
          qml.CNOT(wires=[0, 1])
          return qml.expval(H)
  
      res = qml.specs(circuit)()
  
      assert res["num_observables"] == 1
      assert res["num_diagonalizing_gates"] == 0
  
imports: import copy
  import numpy
  import pytest
  import pennylane
  from pennylane import numpy
label_desc: Use image node_id 14 for calling the TestNewVQE obj's underlying member method code with example usage: obj.test_specs() and returns: qml