---
title: QasmQobjInstruction (v1.4)
description: API reference for qiskit.qobj.QasmQobjInstruction in qiskit v1.4
source: https://eu-de.quantum.cloud.ibm.com/docs/en/api/qiskit/1.4/qiskit.qobj.QasmQobjInstruction
---

# QasmQobjInstruction

*class* `qiskit.qobj.QasmQobjInstruction(name, params=None, qubits=None, register=None, memory=None, condition=None, conditional=None, label=None, mask=None, relation=None, val=None, snapshot_type=None)`

[GitHub](https://github.com/Qiskit/qiskit/tree/stable/1.4/qiskit/qobj/qasm_qobj.py#L24-L202)

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

A class representing a single instruction in an QasmQobj Experiment.

Instantiate a new QasmQobjInstruction object.

> **Deprecated since version 1.2**
>
> The class `qiskit.qobj.qasm_qobj.QasmQobjInstruction` is deprecated as of qiskit 1.2. It will be removed in the 2.0 release. The Qobj class and related functionality are part of the deprecated BackendV1 workflow, and no longer necessary for BackendV2. If a user workflow requires Qobj it likely relies on deprecated functionality and should be updated to use BackendV2.

**Parameters**

- **name** ([*str*](https://docs.python.org/3/library/stdtypes.html#str)) – The name of the instruction
- **params** ([*list*](https://docs.python.org/3/library/stdtypes.html#list)) – The list of parameters for the gate
- **qubits** ([*list*](https://docs.python.org/3/library/stdtypes.html#list)) – A list of `int` representing the qubits the instruction operates on
- **register** ([*list*](https://docs.python.org/3/library/stdtypes.html#list)) – If a `measure` instruction this is a list of `int` containing the list of register slots in which to store the measurement results (must be the same length as qubits). If a `bfunc` instruction this is a single `int` of the register slot in which to store the result.
- **memory** ([*list*](https://docs.python.org/3/library/stdtypes.html#list)) – If a `measure` instruction this is a list of `int` containing the list of memory slots to store the measurement results in (must be the same length as qubits). If a `bfunc` instruction this is a single `int` of the memory slot to store the boolean function result in.
- **condition** ([*tuple*](https://docs.python.org/3/library/stdtypes.html#tuple)) – A tuple of the form `(int, int)` where the first `int` is the control register and the second `int` is the control value if the gate has a condition.
- **conditional** ([*int*](https://docs.python.org/3/library/functions.html#int)) – The register index of the condition
- **label** ([*str*](https://docs.python.org/3/library/stdtypes.html#str)) – An optional label assigned to the instruction
- **mask** ([*int*](https://docs.python.org/3/library/functions.html#int)) – For a `bfunc` instruction the hex value which is applied as an `AND` to the register bits.
- **relation** ([*str*](https://docs.python.org/3/library/stdtypes.html#str)) – Relational operator for comparing the masked register to the `val` kwarg. Can be either `==` (equals) or `!=` (not equals).
- **val** ([*int*](https://docs.python.org/3/library/functions.html#int)) – Value to which to compare the masked register. In other words, the output of the function is `(register AND mask)`
- **snapshot\_type** ([*str*](https://docs.python.org/3/library/stdtypes.html#str)) – For snapshot instructions the type of snapshot to use

## Methods

### from\_dict

*classmethod* `from_dict(data)`

[GitHub](https://github.com/Qiskit/qiskit/tree/stable/1.4/qiskit/qobj/qasm_qobj.py#L185-L196)

Create a new QasmQobjInstruction object from a dictionary.

**Parameters**

**data** ([*dict*](https://docs.python.org/3/library/stdtypes.html#dict)) – A dictionary for the experiment config

**Returns**

The object from the input dictionary.

**Return type**

[QasmQobjInstruction](#qiskit.qobj.QasmQobjInstruction "qiskit.qobj.QasmQobjInstruction")

### to\_dict

`to_dict()`

[GitHub](https://github.com/Qiskit/qiskit/tree/stable/1.4/qiskit/qobj/qasm_qobj.py#L106-L140)

Return a dictionary format representation of the Instruction.

**Returns**

The dictionary form of the QasmQobjInstruction.

**Return type**

[dict](https://docs.python.org/3/library/stdtypes.html#dict)