Source code for qiskit_aer.aerprovider

# This code is part of Qiskit.
#
# (C) Copyright IBM 2018, 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.

# pylint: disable=invalid-name
"""Provider for Aer backends."""


from qiskit.providers import ProviderV1 as Provider
from qiskit.providers.providerutils import filter_backends

from .backends.aer_simulator import AerSimulator
from .backends.qasm_simulator import QasmSimulator
from .backends.statevector_simulator import StatevectorSimulator
from .backends.unitary_simulator import UnitarySimulator


[docs]class AerProvider(Provider): """Provider for Aer backends.""" _BACKENDS = None @staticmethod def _get_backends(): if AerProvider._BACKENDS is None: # Populate the list of Aer simulator backends. methods = AerSimulator().available_methods() devices = AerSimulator().available_devices() backends = [] for method in methods: name = "aer_simulator" if method not in [None, "automatic"]: name += f"_{method}" device_name = "CPU" backends.append((name, AerSimulator, method, device_name)) # Add GPU device backends if method in ["statevector", "density_matrix", "unitary"]: for device in devices: if device != "CPU": new_name = f"{name}_{device}".lower() device_name = device backends.append((new_name, AerSimulator, method, device_name)) # Add legacy backend names backends += [ ("qasm_simulator", QasmSimulator, None, None), ("statevector_simulator", StatevectorSimulator, None, None), ("unitary_simulator", UnitarySimulator, None, None), ] AerProvider._BACKENDS = backends return AerProvider._BACKENDS
[docs] def get_backend(self, name=None, **kwargs): return super().get_backend(name=name, **kwargs)
[docs] def backends(self, name=None, filters=None, **kwargs): # pylint: disable=arguments-differ # Instantiate a new backend instance so if config options # are set they will only last as long as that backend object exists backends = [] # pylint: disable=not-an-iterable # pylint infers _get_backends to always return None for backend_name, backend_cls, method, device in self._get_backends(): opts = {"provider": self} if method is not None: opts["method"] = method if device is not None: opts["device"] = device if name is None or backend_name == name: backends.append(backend_cls(**opts)) return filter_backends(backends, filters=filters)
def __str__(self): return "AerProvider"