Add DAGCircuit method to replace block of nodes with another set of nodes #9863
+101
−2
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Summary
When optimizing circuits one often knows a transformation of a subcircuit into a more desirable form. If the initial subcircuit is listed as a set of nodes of a DAGCircuit this can be replaced by another set of nodes.
Details and comments
This works by using
DAGCirucit.replace_block_with_op
and thenDAGCircuit.substitute_node_with_dag
to apply the transformation.