C贸digo fuente para qiskit.execute_function

# This code is part of Qiskit.
# (C) Copyright IBM 2017, 2019.
# This code is licensed under the Apache License, Version 2.0. You may
# obtain a copy of this license in the LICENSE.txt file in the root directory
# of this source tree or at http://www.apache.org/licenses/LICENSE-2.0.
# Any modifications or derivative works of this code must retain this
# copyright notice, and modified files need to carry a notice indicating
# that they have been altered from the originals.

Executing Experiments (:mod:`qiskit.execute_function`)

.. currentmodule:: qiskit.execute_function

.. autofunction:: execute
import logging
from time import time

from qiskit.compiler import transpile, schedule
from qiskit.providers.backend import Backend
from qiskit.pulse import Schedule, ScheduleBlock
from qiskit.exceptions import QiskitError
from qiskit.utils.deprecation import deprecate_arg

logger = logging.getLogger(__name__)

def _log_submission_time(start_time, end_time):
    log_msg = "Total Job Submission Time - %.5f (ms)" % ((end_time - start_time) * 1000)

[documentos]@deprecate_arg("qobj_id", since="0.21.0", additional_msg="This argument has no effect anymore.") @deprecate_arg("qobj_header", since="0.21.0", additional_msg="This argument has no effect anymore.") def execute( experiments, backend, basis_gates=None, coupling_map=None, # circuit transpile options backend_properties=None, initial_layout=None, seed_transpiler=None, optimization_level=None, pass_manager=None, qobj_id=None, qobj_header=None, shots=None, # common run options memory=None, seed_simulator=None, default_qubit_los=None, default_meas_los=None, # schedule run options qubit_lo_range=None, meas_lo_range=None, schedule_los=None, meas_level=None, meas_return=None, memory_slots=None, memory_slot_size=None, rep_time=None, rep_delay=None, parameter_binds=None, schedule_circuit=False, inst_map=None, meas_map=None, scheduling_method=None, init_qubits=None, **run_config, ): """Execute a list of :class:`qiskit.circuit.QuantumCircuit` or :class:`qiskit.pulse.Schedule` on a backend. The execution is asynchronous, and a handle to a job instance is returned. Args: experiments (QuantumCircuit or list[QuantumCircuit] or Schedule or list[Schedule]): Circuit(s) or pulse schedule(s) to execute backend (Backend): Backend to execute circuits on. Transpiler options are automatically grabbed from backend.configuration() and backend.properties(). If any other option is explicitly set (e.g. coupling_map), it will override the backend's. basis_gates (list[str]): List of basis gate names to unroll to. e.g: ``['u1', 'u2', 'u3', 'cx']``. If ``None``, do not unroll. coupling_map (CouplingMap or list): Coupling map (perhaps custom) to target in mapping. Multiple formats are supported: #. :class:`.CouplingMap` instance #. ``list``: must be given as an adjacency matrix, where each entry specifies all two-qubit interactions supported by backend e.g: ``[[0, 1], [0, 3], [1, 2], [1, 5], [2, 5], [4, 1], [5, 3]]`` backend_properties (BackendProperties): Properties returned by a backend, including information on gate errors, readout errors, qubit coherence times, etc. Find a backend that provides this information with: ``backend.properties()`` initial_layout (Layout or dict or list): Initial position of virtual qubits on physical qubits. If this layout makes the circuit compatible with the coupling_map constraints, it will be used. The final layout is not guaranteed to be the same, as the transpiler may permute qubits through swaps or other means. Multiple formats are supported: #. :class:`qiskit.transpiler.Layout` instance #. ``dict``: * virtual to physical:: {qr[0]: 0, qr[1]: 3, qr[2]: 5} * physical to virtual:: {0: qr[0], 3: qr[1], 5: qr[2]} #. ``list``: * virtual to physical:: [0, 3, 5] # virtual qubits are ordered (in addition to named) * physical to virtual:: [qr[0], None, None, qr[1], None, qr[2]] seed_transpiler (int): Sets random seed for the stochastic parts of the transpiler optimization_level (int): How much optimization to perform on the circuits. Higher levels generate more optimized circuits, at the expense of longer transpilation time. * 0: no optimization * 1: light optimization * 2: heavy optimization * 3: even heavier optimization If None, level 1 will be chosen as default. pass_manager (PassManager): The pass manager to use during transpilation. If this arg is present, auto-selection of pass manager based on the transpile options will be turned off and this pass manager will be used directly. qobj_id (str): DEPRECATED: String identifier to annotate the Qobj. This has no effect and the :attr:`~.QuantumCircuit.name` attribute of the input circuit(s) should be used instead. qobj_header (QobjHeader or dict): DEPRECATED: User input that will be inserted in Qobj header, and will also be copied to the corresponding :class:`qiskit.result.Result` header. Headers do not affect the run. Headers do not affect the run. This kwarg has no effect anymore and the :attr:`~.QuantumCircuit.metadata` attribute of the input circuit(s) should be used instead. shots (int): Number of repetitions of each circuit, for sampling. Default: 1024 memory (bool): If True, per-shot measurement bitstrings are returned as well (provided the backend supports it). For OpenPulse jobs, only measurement level 2 supports this option. Default: False seed_simulator (int): Random seed to control sampling, for when backend is a simulator default_qubit_los (Optional[List[float]]): List of job level qubit drive LO frequencies in Hz. Overridden by ``schedule_los`` if specified. Must have length ``n_qubits``. default_meas_los (Optional[List[float]]): List of job level measurement LO frequencies in Hz. Overridden by ``schedule_los`` if specified. Must have length ``n_qubits``. qubit_lo_range (Optional[List[List[float]]]): List of job level drive LO ranges each of form ``[range_min, range_max]`` in Hz. Used to validate ``qubit_lo_freq``. Must have length ``n_qubits``. meas_lo_range (Optional[List[List[float]]]): List of job level measurement LO ranges each of form ``[range_min, range_max]`` in Hz. Used to validate ``meas_lo_freq``. Must have length ``n_qubits``. schedule_los (list): Experiment level (ie circuit or schedule) LO frequency configurations for qubit drive and measurement channels. These values override the job level values from ``default_qubit_los`` and ``default_meas_los``. Frequencies are in Hz. Settable for qasm and pulse jobs. If a single LO config or dict is used, the values are set at job level. If a list is used, the list must be the size of the number of experiments in the job, except in the case of a single experiment. In this case, a frequency sweep will be assumed and one experiment will be created for every list entry. Not every channel is required to be specified. If not specified, the backend default value will be used. meas_level (int or MeasLevel): Set the appropriate level of the measurement output for pulse experiments. meas_return (str or MeasReturn): Level of measurement data for the backend to return For ``meas_level`` 0 and 1: ``"single"`` returns information from every shot. ``"avg"`` returns average measurement output (averaged over number of shots). memory_slots (int): Number of classical memory slots used in this job. memory_slot_size (int): Size of each memory slot if the output is Level 0. rep_time (int): Time per program execution in seconds. Must be from the list provided by the backend (``backend.configuration().rep_times``). Defaults to the first entry. rep_delay (float): Delay between programs in seconds. Only supported on certain backends (``backend.configuration().dynamic_reprate_enabled`` ). If supported, ``rep_delay`` will be used instead of ``rep_time`` and must be from the range supplied by the backend (``backend.configuration().rep_delay_range``). Default is given by ``backend.configuration().default_rep_delay``. parameter_binds (list[dict]): List of Parameter bindings over which the set of experiments will be executed. Each list element (bind) should be of the form ``{Parameter1: value1, Parameter2: value2, ...}``. All binds will be executed across all experiments, e.g. if parameter_binds is a length-:math:`n` list, and there are :math:`m` experiments, a total of :math:`m \\times n` experiments will be run (one for each experiment/bind pair). schedule_circuit (bool): If ``True``, ``experiments`` will be converted to :class:`qiskit.pulse.Schedule` objects prior to execution. inst_map (InstructionScheduleMap): Mapping of circuit operations to pulse schedules. If None, defaults to the ``instruction_schedule_map`` of ``backend``. meas_map (list(list(int))): List of sets of qubits that must be measured together. If None, defaults to the ``meas_map`` of ``backend``. scheduling_method (str or list(str)): Optionally specify a particular scheduling method. init_qubits (bool): Whether to reset the qubits to the ground state for each shot. Default: ``True``. run_config (dict): Extra arguments used to configure the run (e.g. for Aer configurable backends). Refer to the backend documentation for details on these arguments. Note: for now, these keyword arguments will both be copied to the Qobj config, and passed to backend.run() Returns: Job: returns job instance derived from Job Raises: QiskitError: if the execution cannot be interpreted as either circuits or schedules Example: Construct a 5-qubit GHZ circuit and execute 4321 shots on a backend. .. code-block:: from qiskit import QuantumCircuit, execute, BasicAer backend = BasicAer.get_backend('qasm_simulator') qc = QuantumCircuit(5, 5) qc.h(0) qc.cx(0, range(1, 5)) qc.measure_all() job = execute(qc, backend, shots=4321) """ del qobj_id del qobj_header if isinstance(experiments, (Schedule, ScheduleBlock)) or ( isinstance(experiments, list) and isinstance(experiments[0], (Schedule, ScheduleBlock)) ): # do not transpile a schedule circuit if schedule_circuit: raise QiskitError("Must supply QuantumCircuit to schedule circuit.") elif pass_manager is not None: # transpiling using pass_manager _check_conflicting_argument( optimization_level=optimization_level, basis_gates=basis_gates, coupling_map=coupling_map, seed_transpiler=seed_transpiler, backend_properties=backend_properties, initial_layout=initial_layout, ) experiments = pass_manager.run(experiments) else: # transpiling the circuits using given transpile options experiments = transpile( experiments, basis_gates=basis_gates, coupling_map=coupling_map, backend_properties=backend_properties, initial_layout=initial_layout, seed_transpiler=seed_transpiler, optimization_level=optimization_level, backend=backend, ) if schedule_circuit: experiments = schedule( circuits=experiments, backend=backend, inst_map=inst_map, meas_map=meas_map, method=scheduling_method, ) if isinstance(backend, Backend): start_time = time() run_kwargs = { "shots": shots, "memory": memory, "seed_simulator": seed_simulator, "qubit_lo_freq": default_qubit_los, "meas_lo_freq": default_meas_los, "qubit_lo_range": qubit_lo_range, "meas_lo_range": meas_lo_range, "schedule_los": schedule_los, "meas_level": meas_level, "meas_return": meas_return, "memory_slots": memory_slots, "memory_slot_size": memory_slot_size, "rep_time": rep_time, "rep_delay": rep_delay, "init_qubits": init_qubits, } for key in list(run_kwargs.keys()): if not hasattr(backend.options, key): if run_kwargs[key] is not None: logger.info( "%s backend doesn't support option %s so not passing that kwarg to run()", backend.name, key, ) del run_kwargs[key] elif run_kwargs[key] is None: del run_kwargs[key] if parameter_binds: run_kwargs["parameter_binds"] = parameter_binds run_kwargs.update(run_config) job = backend.run(experiments, **run_kwargs) end_time = time() _log_submission_time(start_time, end_time) else: raise QiskitError("Invalid backend type %s" % type(backend)) return job
def _check_conflicting_argument(**kargs): conflicting_args = [arg for arg, value in kargs.items() if value] if conflicting_args: raise QiskitError( "The parameters pass_manager conflicts with the following " "parameter(s): {}.".format(", ".join(conflicting_args)) )