I have the following code, which runs properly.
from qiskit import * from qiskit.converters import * ghz2 = QuantumCircuit(5, 5) ghz2.h(2) ghz2.cx(2, 1) ghz2.cx(1, 0) ghz2.cx(2, 3) ghz2.cx(3, 4) ghz_dag = circuit_to_dag(ghz2)
How do I access properties of this dag? For instance, I would like to get all the 2-qubit gates using the collect 2qubit gates method (the output is supposed to be a dictionary) or simply draw the DAG but again, dag_drawer(ghz_dag) throws up an error (
'MultiDiGraph' object has no attribute 'number_of_selfloops') even though, that's done in an example here.
Maybe this is just a Python usage question but how does one access the properties of the DAG?