Circuit and Schedule Assembler (qiskit.assembler)

Circuit Assembler

qiskit.assembler.assemble_circuits(circuits, run_config, qobj_id, qobj_header)

Assembles a list of circuits into a qobj that can be run on the backend.

Paramètres:

• circuits (List[QuantumCircuit]) – circuit(s) to assemble

• run_config (RunConfig) – configuration of the runtime environment

• qobj_id (int) – identifier for the generated qobj

• qobj_header (QobjHeader) – header to pass to the results

Renvoie:

The qobj to be run on the backends

Type renvoyé:

QasmQobj

Exemples

from qiskit.circuit import QuantumRegister, ClassicalRegister, QuantumCircuit
from qiskit.assembler import assemble_circuits
from qiskit.assembler.run_config import RunConfig
# Build a circuit to convert into a Qobj
q = QuantumRegister(2)
c = ClassicalRegister(2)
qc = QuantumCircuit(q, c)
qc.h(q[0])
qc.cx(q[0], q[1])
qc.measure(q, c)
# Assemble a Qobj from the input circuit
qobj = assemble_circuits(circuits=[qc],
                         qobj_id="custom-id",
                         qobj_header=[],
                         run_config=RunConfig(shots=2000, memory=True, init_qubits=True))

Schedule Assembler

qiskit.assembler.assemble_schedules(schedules, qobj_id, qobj_header, run_config)

Assembles a list of schedules into a qobj that can be run on the backend.

Paramètres:

• schedules (List[ScheduleBlock | Schedule | Instruction | Tuple[int, Schedule | Instruction]]) – Schedules to assemble.

• qobj_id (int) – Identifier for the generated qobj.

• qobj_header (QobjHeader) – Header to pass to the results.

• run_config (RunConfig) – Configuration of the runtime environment.

Renvoie:

The Qobj to be run on the backends.

Lève:

QiskitError – when frequency settings are not supplied.

Type renvoyé:

PulseQobj

Exemples

from qiskit import pulse
from qiskit.assembler import assemble_schedules
from qiskit.assembler.run_config import RunConfig
# Construct a Qobj header for the output Qobj
header = {"backend_name": "FakeOpenPulse2Q", "backend_version": "0.0.0"}
# Build a configuration object for the output Qobj
config = RunConfig(shots=1024,
                   memory=False,
                   meas_level=1,
                   meas_return='avg',
                   memory_slot_size=100,
                   parametric_pulses=[],
                   init_qubits=True,
                   qubit_lo_freq=[4900000000.0, 5000000000.0],
                   meas_lo_freq=[6500000000.0, 6600000000.0],
                   schedule_los=[])
# Build a Pulse schedule to assemble into a Qobj
schedule = pulse.Schedule()
schedule += pulse.Play(pulse.Waveform([0.1] * 16, name="test0"),
                       pulse.DriveChannel(0),
                       name="test1")
schedule += pulse.Play(pulse.Waveform([0.1] * 16, name="test1"),
                       pulse.DriveChannel(0),
                       name="test2")
schedule += pulse.Play(pulse.Waveform([0.5] * 16, name="test0"),
                       pulse.DriveChannel(0),
                       name="test1")
# Assemble a Qobj from the schedule.
pulseQobj = assemble_schedules(schedules=[schedule],
                               qobj_id="custom-id",
                               qobj_header=header,
                               run_config=config)

Disassembler

qiskit.assembler.disassemble(qobj)

Disassemble a qobj and return the circuits or pulse schedules, run_config, and user header.

Note

disassemble(assemble(qc)) is not guaranteed to produce an exactly equal circuit to the input, due to limitations in the QasmQobj format that need to be maintained for backend system compatibility. This is most likely to be the case when using newer features of QuantumCircuit. In most cases, the output should be equivalent, if not quite equal.

Paramètres:

qobj (Qobj) – The input qobj object to disassemble

Renvoie:

The disassembled program which consists of:

• programs: A list of quantum circuits or pulse schedules

• run_config: The dict of the run config

• user_qobj_header: The dict of any user headers in the qobj

Type renvoyé:

Union[CircuitModule, PulseModule]

Exemples

from qiskit.circuit import QuantumRegister, ClassicalRegister, QuantumCircuit
from qiskit.compiler.assembler import assemble
from qiskit.assembler.disassemble import disassemble
# Create a circuit to assemble into a qobj
q = QuantumRegister(2)
c = ClassicalRegister(2)
qc = QuantumCircuit(q, c)
qc.h(q[0])
qc.cx(q[0], q[1])
qc.measure(q, c)
# Assemble the circuit into a Qobj
qobj = assemble(qc, shots=2000, memory=True)
# Disassemble the qobj back into a circuit
circuits, run_config_out, headers = disassemble(qobj)

RunConfig

RunConfig([shots, seed_simulator, memory, ...])

Class for Run Configuration.