---
title: QasmQobj (v1.1)
description: API reference for qiskit.qobj.QasmQobj in qiskit v1.1
source: https://eu-de.quantum.cloud.ibm.com/docs/en/api/qiskit/1.1/qiskit.qobj.QasmQobj
---

# QasmQobj

*class* `qiskit.qobj.QasmQobj(qobj_id=None, config=None, experiments=None, header=None)`

[GitHub](https://github.com/Qiskit/qiskit/tree/stable/1.1/qiskit/qobj/qasm_qobj.py#L543-L656)

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

An OpenQASM 2 Qobj.

Instantiate a new OpenQASM 2 Qobj Object.

Each OpenQASM 2 Qobj object is used to represent a single payload that will be passed to a Qiskit provider. It mirrors the Qobj the published [Qobj specification](https://arxiv.org/abs/1809.03452) for OpenQASM experiments.

**Parameters**

- **qobj\_id** ([*str*](https://docs.python.org/3/library/stdtypes.html#str)) – An identifier for the qobj
- **config** (*QasmQobjRunConfig*) – A config for the entire run
- **header** ([*QobjHeader*](/docs/api/qiskit/1.1/qiskit.qobj.QobjHeader "qiskit.qobj.QobjHeader")) – A header for the entire run
- **experiments** ([*list*](https://docs.python.org/3/library/stdtypes.html#list)) – A list of lists of [`QasmQobjExperiment`](/docs/api/qiskit/1.1/qiskit.qobj.QasmQobjExperiment "qiskit.qobj.QasmQobjExperiment") objects representing an experiment

## Methods

### from\_dict

*classmethod* `from_dict(data)`

[GitHub](https://github.com/Qiskit/qiskit/tree/stable/1.1/qiskit/qobj/qasm_qobj.py#L627-L650)

Create a new QASMQobj object from a dictionary.

**Parameters**

**data** ([*dict*](https://docs.python.org/3/library/stdtypes.html#dict)) – A dictionary representing the QasmQobj to create. It will be in the same format as output by [`to_dict()`](#qiskit.qobj.QasmQobj.to_dict "qiskit.qobj.QasmQobj.to_dict").

**Returns**

The QasmQobj from the input dictionary.

**Return type**

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

### to\_dict

`to_dict()`

[GitHub](https://github.com/Qiskit/qiskit/tree/stable/1.1/qiskit/qobj/qasm_qobj.py#L590-L625)

Return a dictionary format representation of the OpenQASM 2 Qobj.

Note this dict is not in the json wire format expected by IBM and Qobj specification because complex numbers are still of type complex. Also, this may contain native numpy arrays. When serializing this output for use with IBM systems, you can leverage a json encoder that converts these as expected. For example:

```python
import json
import numpy

class QobjEncoder(json.JSONEncoder):
    def default(self, obj):
        if isinstance(obj, numpy.ndarray):
            return obj.tolist()
        if isinstance(obj, complex):
            return (obj.real, obj.imag)
        return json.JSONEncoder.default(self, obj)

json.dumps(qobj.to_dict(), cls=QobjEncoder)
```

**Returns**

A dictionary representation of the QasmQobj object

**Return type**

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