def test_construct_circuit(self, expectation, num_circuits):
"""Test construct circuits returns QuantumCircuits and the right number of them."""
wavefunction = EfficientSU2(2, reps=1)
vqe = VQE(self.h2_op, wavefunction, expectation=expectation)
params = [0] * wavefunction.num_parameters
circuits = vqe.construct_circuit(params)
self.assertEqual(len(circuits), num_circuits)
for circuit in circuits:
self.assertIsInstance(circuit, QuantumCircuit)
# group the operators
qubit_op.to_grouped_paulis()
# get an optimizer
optimizer = AQGD(maxiter=15, disp=True)
# form the algorithm
vqe = VQE(qubit_op, ansatz, optimizer)
# get a backend
backend = Aer.get_backend("statevector_simulator")
# get a quantum instance
qinstance = QuantumInstance(backend, shots=1024)
# ===================
# Do the optimization
# ===================
result = vqe.run(qinstance)
# ================
# Show the results
# ================
# output of the optimization
print(result)
# show the circuit
circuit = vqe.construct_circuit(list(range(8)), backend)[0]
print(circuit)
