# Copyright 2019-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"). You
# may not use this file except in compliance with the License. A copy of
# the License is located at
#
# http://aws.amazon.com/apache2.0/
#
# or in the "license" file accompanying this file. This file is
# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
# ANY KIND, either express or implied. See the License for the specific
# language governing permissions and limitations under the License.
from braket.circuits import Circuit, ResultType
[docs]def validate_circuit_and_shots(circuit: Circuit, shots: int) -> None:
"""
Validates if circuit and shots are correct before running on a device
Args:
circuit (Circuit): circuit to validate
shots (int): shots to validate
Raises:
ValueError: If no result types specified for circuit and shots=0.
See `braket.circuit.result_types. Or, if `StateVector` or `Amplitude`
are specified as result types when shots > 0.
"""
if not shots and not circuit.result_types:
raise ValueError(
"No result types specified for circuit and shots=0. See `braket.circuit.result_types`"
)
elif shots and circuit.result_types:
for rt in circuit.result_types:
if isinstance(rt, ResultType.StateVector) or isinstance(rt, ResultType.Amplitude):
raise ValueError("StateVector or Amplitude cannot be specified when shots>0")