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# This code is part of Qiskit. | ||
# | ||
# (C) Copyright IBM 2024. | ||
# | ||
# 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. | ||
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"""Utilities for working with IBM Quantum backends.""" | ||
import json | ||
from datetime import datetime | ||
from typing import Any | ||
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from qiskit.circuit import ParameterExpression | ||
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class BackendEncoder(json.JSONEncoder): | ||
"""A json encoder for qobj""" | ||
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def default(self, obj: Any) -> Any: # pylint: disable=arguments-differ | ||
"""Default encoding""" | ||
# Convert numpy arrays: | ||
if hasattr(obj, "tolist"): | ||
return obj.tolist() | ||
# Use Qobj complex json format: | ||
if isinstance(obj, complex): | ||
return [obj.real, obj.imag] | ||
if isinstance(obj, ParameterExpression): | ||
return float(obj) | ||
if isinstance(obj, datetime): | ||
return obj.isoformat() | ||
return json.JSONEncoder.default(self, obj) |
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The instances of :class:`FakeBackend` can now be updated from | ||
their real counterpart using the :meth:`FakeBackendV2.refresh`. | ||
To pull the latest real backend data files, access permission is | ||
required. |
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