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---
title: QasmQobjInstruction (v0.26)
description: API reference for qiskit.qobj.QasmQobjInstruction in qiskit v0.26
in_page_toc_min_heading_level: 1
python_api_type: class
python_api_name: qiskit.qobj.QasmQobjInstruction
---
<span id="qiskit-qobj-qasmqobjinstruction" />
# qiskit.qobj.QasmQobjInstruction
<Class id="qiskit.qobj.QasmQobjInstruction" isDedicatedPage={true} github="https://github.com/qiskit/qiskit/tree/stable/0.17/qiskit/qobj/qasm_qobj.py" signature="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)" modifiers="class">
A class representing a single instruction in an QasmQobj Experiment.
Instantiate a new QasmQobjInstruction object.
**Parameters**
* **name** (*str*) The name of the instruction
* **params** (*list*) The list of parameters for the gate
* **qubits** (*list*) A list of `int` representing the qubits the instruction operates on
* **register** (*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*) 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*) 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*) The register index of the condition
* **label** (*str*) An optional label assigned to the instruction
* **mask** (*int*) For a `bfunc` instruction the hex value which is applied as an `AND` to the register bits.
* **relation** (*str*) Relational operator for comparing the masked register to the `val` kwarg. Can be either `==` (equals) or `!=` (not equals).
* **val** (*int*) Value to which to compare the masked register. In other words, the output of the function is `(register AND mask)`
* **snapshot\_type** (*str*) For snapshot instructions the type of snapshot to use
### \_\_init\_\_
<Function id="qiskit.qobj.QasmQobjInstruction.__init__" signature="__init__(name, params=None, qubits=None, register=None, memory=None, condition=None, conditional=None, label=None, mask=None, relation=None, val=None, snapshot_type=None)">
Instantiate a new QasmQobjInstruction object.
**Parameters**
* **name** (*str*) The name of the instruction
* **params** (*list*) The list of parameters for the gate
* **qubits** (*list*) A list of `int` representing the qubits the instruction operates on
* **register** (*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*) 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*) 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*) The register index of the condition
* **label** (*str*) An optional label assigned to the instruction
* **mask** (*int*) For a `bfunc` instruction the hex value which is applied as an `AND` to the register bits.
* **relation** (*str*) Relational operator for comparing the masked register to the `val` kwarg. Can be either `==` (equals) or `!=` (not equals).
* **val** (*int*) Value to which to compare the masked register. In other words, the output of the function is `(register AND mask)`
* **snapshot\_type** (*str*) For snapshot instructions the type of snapshot to use
</Function>
## Methods
| | |
| ---------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------- |
| [`__init__`](#qiskit.qobj.QasmQobjInstruction.__init__ "qiskit.qobj.QasmQobjInstruction.__init__")(name\[, params, qubits, register, …]) | Instantiate a new QasmQobjInstruction object. |
| [`from_dict`](#qiskit.qobj.QasmQobjInstruction.from_dict "qiskit.qobj.QasmQobjInstruction.from_dict")(data) | Create a new QasmQobjInstruction object from a dictionary. |
| [`to_dict`](#qiskit.qobj.QasmQobjInstruction.to_dict "qiskit.qobj.QasmQobjInstruction.to_dict")() | Return a dictionary format representation of the Instruction. |
### from\_dict
<Function id="qiskit.qobj.QasmQobjInstruction.from_dict" signature="from_dict(data)" modifiers="classmethod">
Create a new QasmQobjInstruction object from a dictionary.
**Parameters**
**data** (*dict*) A dictionary for the experiment config
**Returns**
The object from the input dictionary.
**Return type**
[QasmQobjInstruction](#qiskit.qobj.QasmQobjInstruction "qiskit.qobj.QasmQobjInstruction")
</Function>
### to\_dict
<Function id="qiskit.qobj.QasmQobjInstruction.to_dict" signature="to_dict()">
Return a dictionary format representation of the Instruction.
**Returns**
The dictionary form of the QasmQobjInstruction.
**Return type**
dict
</Function>
</Class>