DAGDepNode

class qiskit.dagcircuit.DAGDepNode(type=None, op=None, name=None, qargs=(), cargs=(), successors=None, predecessors=None, reachable=None, matchedwith=None, successorstovisit=None, isblocked=None, qindices=None, cindices=None, nid=-1)

Bases: object

Object to represent the information at a node in the DAGDependency().

It is used as the return value from *_nodes() functions and can be supplied to functions that take a node.

Attributes

type

name

cargs

sort_key

node_id

successors

predecessors

reachable

matchedwith

isblocked

successorstovisit

qindices

cindices

op

Returns the Instruction object corresponding to the op for the node, else None

qargs

Returns list of Qubit, else an empty list.

Methods

copy()

Function to copy a DAGDepNode object. :returns: a copy of a DAGDepNode object. :rtype: DAGDepNode

static semantic_eq(node1, node2)

Check if DAG nodes are considered equivalent, e.g., as a node_match for nx.is_isomorphic.

Parameters:

• node1 (DAGDepNode) – A node to compare.

• node2 (DAGDepNode) – The other node to compare.

Returns:

If node1 == node2

Return type:

Bool