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---
title: circuit_to_dag (v0.29)
description: API reference for qiskit.converters.circuit_to_dag in qiskit v0.29
in_page_toc_min_heading_level: 1
python_api_type: function
python_api_name: qiskit.converters.circuit_to_dag
---
<span id="qiskit-converters-circuit-to-dag" />
# qiskit.converters.circuit\_to\_dag
<Function id="qiskit.converters.circuit_to_dag" isDedicatedPage={true} github="https://github.com/qiskit/qiskit/tree/stable/0.18/qiskit/converters/circuit_to_dag.py" signature="circuit_to_dag(circuit)">
Build a `DAGCircuit` object from a `QuantumCircuit`.
**Parameters**
**circuit** ([*QuantumCircuit*](qiskit.circuit.QuantumCircuit "qiskit.circuit.QuantumCircuit")) the input circuit.
**Returns**
the DAG representing the input circuit.
**Return type**
[DAGCircuit](qiskit.dagcircuit.DAGCircuit "qiskit.dagcircuit.DAGCircuit")
**Example**
```python
from qiskit import QuantumRegister, ClassicalRegister, QuantumCircuit
from qiskit.dagcircuit import DAGCircuit
from qiskit.converters import circuit_to_dag
from qiskit.visualization import dag_drawer
%matplotlib inline
q = QuantumRegister(3, 'q')
c = ClassicalRegister(3, 'c')
circ = QuantumCircuit(q, c)
circ.h(q[0])
circ.cx(q[0], q[1])
circ.measure(q[0], c[0])
circ.rz(0.5, q[1]).c_if(c, 2)
dag = circuit_to_dag(circ)
dag_drawer(dag)
```
![../\_images/qiskit.converters.circuit\_to\_dag\_0\_0.png](/images/api/qiskit/0.29/qiskit.converters.circuit_to_dag_0_0.png)
</Function>