qiskit.dagcircuit.DAGDepNode

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

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.

__init__(type=None, op=None, name=None, qargs=None, cargs=None, condition=None, successors=None, predecessors=None, reachable=None, matchedwith=None, successorstovisit=None, isblocked=None, qindices=None, cindices=None, nid=- 1)

Initialize self. See help(type(self)) for accurate signature.

Methods

__init__([type, op, name, qargs, cargs, …])	Initialize self.
copy()	Function to copy a DAGDepNode object.
semantic_eq(node1, node2)	Check if DAG nodes are considered equivalent, e.g., as a node_match for nx.is_isomorphic.

Attributes

cargs
cindices
condition
isblocked
matchedwith
name
node_id
op	Returns the Instruction object corresponding to the op for the node, else None
predecessors
qargs	Returns list of Qubit, else an empty list.
qindices
reachable
sort_key
successors
successorstovisit
type

copy()

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

property op

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

property qargs

Returns list of Qubit, else an empty list.

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