---
title: DAGNode (v1.2)
description: API reference for qiskit.dagcircuit.DAGNode in qiskit v1.2
source: https://eu-de.quantum.cloud.ibm.com/docs/en/api/qiskit/1.2/qiskit.dagcircuit.DAGNode
---

# DAGNode

*class* `qiskit.dagcircuit.DAGNode`

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

Parent class for DAGOpNode, DAGInNode, and DAGOutNode.

## Methods

### semantic\_eq

*static* `semantic_eq(node1, node2, bit_indices1, bit_indices2)`

[GitHub](https://github.com/Qiskit/qiskit/tree/stable/1.2/qiskit/dagcircuit/dagnode.py#L181-L237)

Check if DAG nodes are considered equivalent, e.g., as a node\_match for [`rustworkx.is_isomorphic_node_match()`](https://www.rustworkx.org/apiref/rustworkx.is_isomorphic_node_match.html#rustworkx.is_isomorphic_node_match).

**Parameters**

- **node1** ([*DAGOpNode*](/docs/api/qiskit/1.2/qiskit.dagcircuit.DAGOpNode "qiskit.dagcircuit.DAGOpNode")*,* [*DAGInNode*](/docs/api/qiskit/1.2/qiskit.dagcircuit.DAGInNode "qiskit.dagcircuit.DAGInNode")*,* [*DAGOutNode*](/docs/api/qiskit/1.2/qiskit.dagcircuit.DAGOutNode "qiskit.dagcircuit.DAGOutNode")) – A node to compare.
- **node2** ([*DAGOpNode*](/docs/api/qiskit/1.2/qiskit.dagcircuit.DAGOpNode "qiskit.dagcircuit.DAGOpNode")*,* [*DAGInNode*](/docs/api/qiskit/1.2/qiskit.dagcircuit.DAGInNode "qiskit.dagcircuit.DAGInNode")*,* [*DAGOutNode*](/docs/api/qiskit/1.2/qiskit.dagcircuit.DAGOutNode "qiskit.dagcircuit.DAGOutNode")) – The other node to compare.
- **bit\_indices1** ([*dict*](https://docs.python.org/3/library/stdtypes.html#dict)) – Dictionary mapping Bit instances to their index within the circuit containing node1
- **bit\_indices2** ([*dict*](https://docs.python.org/3/library/stdtypes.html#dict)) – Dictionary mapping Bit instances to their index within the circuit containing node2

**Returns**

If node1 == node2

**Return type**

[Bool](/docs/api/qiskit/1.2/circuit_classical#qiskit.circuit.classical.types.Bool "qiskit.circuit.classical.types.Bool")