Source code for pennylane.data.attributes.scalar

# Copyright 2018-2023 Xanadu Quantum Technologies Inc.

# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at

#     http://www.apache.org/licenses/LICENSE-2.0

# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
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"""Contains DatasetAttribute definition for scalars (numbers)."""

from numbers import Number

from pennylane.data.base.attribute import DatasetAttribute
from pennylane.data.base.hdf5 import HDF5Array, HDF5Group


[docs]class DatasetScalar(DatasetAttribute[HDF5Array, Number, Number]): """ Attribute type for numbers. """ type_id = "scalar"
[docs] def hdf5_to_value(self, bind: HDF5Array) -> Number: return bind[()]
[docs] def value_to_hdf5(self, bind_parent: HDF5Group, key: str, value: Number) -> HDF5Array: bind_parent[key] = value return bind_parent[key]