def validate_circuit_and_shots()

in src/braket/circuits/circuit_helpers.py [0:0]

• 13 lines of code
• 10 McCabe index (conditional complexity)

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 circuit has no instructions; if no result types
            specified for circuit and `shots=0`. See `braket.circuit.result_types`;
            if circuit has observables that cannot be simultaneously measured and `shots>0`;
            or, if `StateVector` or `Amplitude` are specified as result types when `shots>0`.
    """
    if not circuit.instructions:
        raise ValueError("Circuit must have instructions to run on a device")
    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:
        if not circuit.observables_simultaneously_measurable:
            raise ValueError("Observables cannot be sampled simultaneously")
        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")