---
title: NoiseLearner (latest version)
description: API reference for qiskit_noise_learning.noise_learner.NoiseLearner in the latest version of qiskit-noise-learning
source: https://quantum.cloud.ibm.com/docs/en/api/qiskit-noise-learning/generated/noise-learner-noise-learner
---

# qiskit\_noise\_learning.noise\_learner.NoiseLearner

*class* `qiskit_noise_learning.noise_learner.NoiseLearner(backend: BackendV2, options: LearningOptions | None = None, executor: ProgramExecutor | None = None)`

[GitHub](https://github.com/Qiskit/qiskit-noise-learning/tree/stable/0.1/qiskit_noise_learning/noise_learner/noise_learner.py)

Bases: [`object`](https://docs.python.org/3/library/functions.html#object)

A noise learner.

> **Note**
>
> The arguments `backend` and `executor` are redundant. This is a temporary measure to enable simulated execution with an [`AerExecutor`](/docs/api/qiskit-noise-learning/generated/aer-executor-aer-executor "qiskit_noise_learning.aer_executor.AerExecutor") instance, and is not a stable interface.

**Parameters**

- **backend** – The backend supplying the compilation target: the gate set, coupling map and qubit count that generated circuits are built against. When `executor` is given, this need not be the device the programs actually run on.
- **options** – Learning options. If `None`, default options are used.
- **executor** – Where generated programs are submitted. If `None` (default), a [`Executor`](/docs/api/qiskit-ibm-runtime/executor "(in Qiskit Runtime IBM Client)") in `backend`’s execution mode is used, so that programs run on `backend` itself.

### \_\_init\_\_

`__init__(backend: BackendV2, options: LearningOptions | None = None, executor: ProgramExecutor | None = None)`

## Methods

|                                                                                                                                                                     |                                                            |
| ------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------- |
| [`__init__`](#qiskit_noise_learning.noise_learner.NoiseLearner.__init__ "qiskit_noise_learning.noise_learner.NoiseLearner.__init__")(backend\[, options, executor]) |                                                            |
| [`run`](#qiskit_noise_learning.noise_learner.NoiseLearner.run "qiskit_noise_learning.noise_learner.NoiseLearner.run")(instructions)                                 | Submit a job to learn the noise of the given instructions. |

## Attributes

|                                                                                                                                   |                       |
| --------------------------------------------------------------------------------------------------------------------------------- | --------------------- |
| [`backend`](#qiskit_noise_learning.noise_learner.NoiseLearner.backend "qiskit_noise_learning.noise_learner.NoiseLearner.backend") | The backend.          |
| [`options`](#qiskit_noise_learning.noise_learner.NoiseLearner.options "qiskit_noise_learning.noise_learner.NoiseLearner.options") | The learning options. |

### backend

Type: [`BackendV2`](/docs/api/qiskit/qiskit.providers.BackendV2)

The backend.

### options

Type: [`LearningOptions`](/docs/api/qiskit-noise-learning/generated/noise-learner-learning-options "qiskit_noise_learning.noise_learner.learning_options.LearningOptions")

The learning options.

### run

`run(instructions: Sequence[CircuitInstruction]) → NoiseLearnerJob`

Submit a job to learn the noise of the given instructions.

**Parameters**

**instructions** – The instructions to learn the noise of. Each instruction should contain a [`BoxOp`](/docs/api/qiskit/qiskit.circuit.BoxOp) operation.

**Returns**

The submitted job. The result of the job is a [`NoiseLearnerResult`](/docs/api/qiskit-noise-learning/generated/noise-learner-noise-learner-result "qiskit_noise_learning.noise_learner.NoiseLearnerResult").

**Raises**

[**ValueError**](https://docs.python.org/3/library/exceptions.html#ValueError) – If any instruction does not contain a `BoxOp`.