title: FakePeekskill (dev version) description: API reference for qiskit_ibm_runtime.fake_provider.FakePeekskill in the dev version of qiskit-ibm-runtime in_page_toc_min_heading_level: 1 python_api_type: class python_api_name: qiskit_ibm_runtime.fake_provider.FakePeekskill

FakePeekskill

A fake 27 qubit backend.

FakeBackendV2 initializer.

Attributes

backend_name

conf_filename

coupling_map

defs_filename

dirname

dt

This is required to be implemented if the backend supports Pulse scheduling.

**Returns**

The input signal timestep in seconds. If the backend doesn’t define `dt`, `None` will be returned.

dtm

**Returns**

The output signal timestep in seconds.

instruction_durations

instructions

max_circuits

meas_map

This is required to be implemented if the backend supports Pulse scheduling.

**Returns**

The grouping of measurements which are multiplexed

**Raises**

**NotImplementedError** – if the backend doesn’t support querying the measurement mapping

num_qubits

operation_names

operations

options

The options of a backend are the dynamic parameters defining how the backend is used. These are used to control the [`run()`](#qiskit_ibm_runtime.fake_provider.FakePeekskill.run "qiskit_ibm_runtime.fake_provider.FakePeekskill.run") method.

props_filename

provider

**Returns**

the provider responsible for the backend.

**Return type**

provider

target

**Return type**

Target

version

name

description

online_date

backend_version

Methods

check_faulty

**Parameters**

**circuit** ([*QuantumCircuit*](/docs/api/qiskit/qiskit.circuit.QuantumCircuit "(in Qiskit v2.1)")) – Circuit to check.

**Raises**

**ValueError** – If an instruction operating on a faulty qubit or edge is found.

**Return type**

None

configuration

**Return type**

*QasmBackendConfiguration*

defaults

**Parameters**

**refresh** (*bool*) – If `True`, re-retrieve the backend defaults from the local file.

**Returns**

The backend pulse defaults or `None` if the backend does not support pulse.

**Return type**

*PulseDefaults*

properties

**Parameters**

**refresh** (*bool*) – If `True`, re-retrieve the backend properties from the local file.

**Returns**

The backend properties.

**Return type**

*BackendProperties*

qubit_properties

If there are no defined or the backend doesn’t support querying these details this method does not need to be implemented.

**Parameters**

**qubit** (*int | List\[int]*) – The qubit to get the `QubitProperties` object for. This can be a single integer for 1 qubit or a list of qubits and a list of `QubitProperties` objects will be returned in the same order

**Returns**

The `QubitProperties` object for the specified qubit. If a list of qubits is provided a list will be returned. If properties are missing for a qubit this can be `None`.

**Raises**

**NotImplementedError** – if the backend doesn’t support querying the qubit properties

**Return type**

[*QubitProperties*](/docs/api/qiskit/qiskit.providers.QubitProperties "(in Qiskit v2.1)") | *List*\[[*QubitProperties*](/docs/api/qiskit/qiskit.providers.QubitProperties "(in Qiskit v2.1)")]

refresh

This method pulls the latest backend data files from their real counterpart and overwrites the corresponding files in the local installation:

*   `../fake_provider/backends/{backend_name}/conf_{backend_name}.json`
*   `../fake_provider/backends/{backend_name}/defs_{backend_name}.json`
*   `../fake_provider/backends/{backend_name}/props_{backend_name}.json`

The new data files will persist through sessions so the files will stay updated unless they are manually reverted locally or when `qiskit-ibm-runtime` is upgraded or reinstalled.

**Parameters**

**service** ([*QiskitRuntimeService*](qiskit-runtime-service "qiskit_ibm_runtime.qiskit_runtime_service.QiskitRuntimeService")) – A `QiskitRuntimeService` instance

**Raises**

*   **ValueError** – if the provided service is a non-QiskitRuntimeService instance.
*   **Exception** – If the real target doesn’t exist or can’t be accessed

**Return type**

None

run

This method runs circuit jobs (an individual or a list of QuantumCircuit) using BasicSimulator or Aer simulator and returns a [`Job`](/docs/api/qiskit/qiskit.providers.Job "(in Qiskit v2.1)") object.

If qiskit-aer is installed, jobs will be run using AerSimulator with noise model of the fake backend. Otherwise, jobs will be run using BasicSimulator without noise.

Currently noisy simulation of a pulse job is not supported yet in FakeBackendV2.

**Parameters**

*   **run\_input** (*QuantumCircuit or list*) – An individual or a list of [`QuantumCircuit`](/docs/api/qiskit/qiskit.circuit.QuantumCircuit "(in Qiskit v2.1)")
*   **options** – Any kwarg options to pass to the backend for running the config. If a key is also present in the options attribute/object then the expectation is that the value specified will be used instead of what’s set in the options object.

**Returns**

The job object for the run

**Return type**

Job

set_options

This method is used to update the options of a backend. If you need to change any of the options prior to running just pass in the kwarg with the new value for the options.

**Parameters**

**fields** – The fields to update the options

**Raises**

**AttributeError** – If the field passed in is not part of the options

status

**Returns**

The status of the backend.

**Return type**

*BackendStatus*