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qiskit.visualization.dag_drawer

qiskit.visualization.dag_drawer(dag, scale=0.7, filename=None, style='color') GitHub(opens in a new tab)

Plot the directed acyclic graph (dag) to represent operation dependencies in a quantum circuit.

This function calls the graphviz_draw()(opens in a new tab) function from the rustworkx package to draw the DAG.

Parameters

Returns

if in Jupyter notebook and not saving to file,

otherwise None.

Return type

PIL.Image

Raises

Example

from qiskit import QuantumRegister, ClassicalRegister, QuantumCircuit
from qiskit.dagcircuit import DAGCircuit
from qiskit.converters import circuit_to_dag
from qiskit.visualization import dag_drawer
 
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)
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