BlockCollapser
class qiskit.dagcircuit.BlockCollapser(dag)
Bases: object
This class implements various strategies of consolidating blocks of nodes in a DAG (directed acyclic graph). It works both with the DAGCircuit and DAGDependency DAG representations.
Parameters
dag (Union[DAGCircuit, DAGDependency]) – The input DAG.
Raises
DAGCircuitError – the input object is not a DAG.
Methods
collapse_to_operation
collapse_to_operation(blocks, collapse_fn)
For each block, constructs a quantum circuit containing instructions in the block, then uses collapse_fn to collapse this circuit into a single operation.
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