def test_autoregister_no_credentials(self):
"""Test register() with no credentials available."""
with no_file('Qconfig.py'), custom_qiskitrc(), no_envs(CREDENTIAL_ENV_VARS):
with self.assertRaises(IBMQAccountError) as context_manager:
IBMQ.load_account()
self.assertIn('No IBM Q Experience credentials found', str(context_manager.exception))
def _try_login_saved_account(cls) -> bool:
if not QiskitIBMQ.active_account():
try:
QiskitIBMQ.load_account()
except IBMQAccountCredentialsNotFound:
print(f"No saved account found for IBMQ. Only simulator devices will be available. {_IBMQHints.LOGIN}")
return False # Failed login
return True # Successful login
def test_load_account_no_credentials(self) -> None:
"""Test ``load_account()`` with no credentials available."""
with custom_qiskitrc(), no_envs(CREDENTIAL_ENV_VARS):
with self.assertRaises(IBMQAccountError) as context_manager:
IBMQ.load_account()
self.assertIn('No IBM Quantum Experience credentials found',
str(context_manager.exception))
def load_account_oneshot():
try:
IBMQ.load_account()
except IBMQAccountError as e:
print("Couldn't load IBMQ account: {}".format(e))
print("Try again, loading API key from file...")
with open(IBMQ_TOKEN_FILENAME, 'r') as file:
IBMQ.save_account(file.read())
IBMQ.load_account()
def analyze_circuit(circuit: QuantumCircuit):
provider = IBMQ.load_account()
backend = provider.get_backend("ibmq_ourense")
print(circuit)
mapped_circuit = transpile(circuit, backend=backend, optimization_level=0)
qobj = assemble(mapped_circuit, backend=backend, shots=8192)
print(mapped_circuit)
print(qobj)
def get_ibm_qc(n_qubits):
provider = IBMQ.load_account()
backend = provider.backends(
filters=lambda x: x.configuration().n_qubits >= n_qubits and not x.
configuration().simulator and x.status().operational)
if len(backend) == 0:
raise Exception("No backend found with the given constraints")
return least_busy(backend)
def get_provider(hub='ibm-q'):
"""Create an IBMQ provider with Qiskit to be used as a device in qbitkit
Args:
hub (str): The hub to pick IBM Q machines from. (default 'ibm-q')
Returns:
qiskit.providers.BaseProvider: the IBMQ provider"""
# Create a provider object from specified hub name.
provider = __IBMQ__.load_account(hub)
# Return new provider object.
return provider
def run_circuit(circuit: QuantumCircuit):
"""account must be saved first: https://quantum-computing.ibm.com/"""
provider = IBMQ.load_account()
# print(provider.backends(simulator=False, operational=True))
backend = provider.get_backend("ibmq_ourense")
print(backend)
mapped_circuit = transpile(circuit, backend=backend)
qobj = assemble(mapped_circuit, backend=backend, shots=8192)
# print(qobj)
job = backend.run(qobj)
print("Job: ")
print(job)
print(job.status())
print(job.job_id())
result = job.result()
counts = result.get_counts()
print(counts)
register_token()
qubits = 4
circuit = QuantumCircuit(qubits, qubits)
circuit.h(0)
circuit.cx(0, 1)
circuit.cx(1, 2)
circuit.measure([0, 1, 2, 3], [0, 1, 2, 3])
circuit.draw(output='mpl')
simulator = Aer.get_backend('qasm_simulator')
sim_result = execute(circuit, backend=simulator, shots=1024).result()
plot_histogram(sim_result.get_counts(circuit))
IBMQ.load_account()
provider = IBMQ.get_provider(hub='ibm-q')
device = provider.get_backend('ibmqx2')
job = execute(circuit, backend=device, shots=1024)
print("Job ID:", job.job_id())
job_monitor(job)
device_result = job.result()
plot_histogram(device_result.get_counts(circuit))
cal_circuits, state_labels = complete_meas_cal(
qr=circuit.qregs[0], circlabel='measerrormitigationcal')
cal_circuits[2].draw(output='mpl')
qft4.barrier()
for j in range(4):
qft4.measure(j, j)
input_state(qft5, 5)
qft5.barrier()
qft(qft5, 5)
qft5.barrier()
for j in range(5):
qft5.measure(j, j)
print(qft3)
print(qft4)
print(qft5)
###############################################################
# Set up the API and execute the program.
###############################################################
provider = IBMQ.load_account()
# Second version: real device
least_busy_device = least_busy(
provider.backends(simulator=False,
filters=lambda x: x.configuration().n_qubits > 4))
print("Running on current least busy device: ", least_busy_device)
job = execute([qft3, qft4, qft5], least_busy_device, shots=1024)
result = job.result()
print(result.get_counts(qft3))
print(result.get_counts(qft4))
print(result.get_counts(qft5))
def ibmq(qpu_name: str):
provider = IBMQ.load_account()
backend = provider.get_backend(qpu_name)
return CouplingMap(backend.configuration().coupling_map)
