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Quellcode für qiskit.converters.dag_to_dagdependency

# This code is part of Qiskit.
#
# (C) Copyright IBM 2020.
#
# This code is licensed under the Apache License, Version 2.0. You may
# obtain a copy of this license in the LICENSE.txt file in the root directory
# of this source tree or at http://www.apache.org/licenses/LICENSE-2.0.
#
# Any modifications or derivative works of this code must retain this
# copyright notice, and modified files need to carry a notice indicating
# that they have been altered from the originals.

"""Helper function for converting a dag circuit to a dag dependency"""
from qiskit.dagcircuit.dagdependency import DAGDependency


[Doku]def dag_to_dagdependency(dag, create_preds_and_succs=True): """Build a ``DAGDependency`` object from a ``DAGCircuit``. Args: dag (DAGCircuit): the input dag. create_preds_and_succs (bool): whether to construct lists of predecessors and successors for every node. Return: DAGDependency: the DAG representing the input circuit as a dag dependency. """ dagdependency = DAGDependency() dagdependency.name = dag.name dagdependency.metadata = dag.metadata dagdependency.add_qubits(dag.qubits) dagdependency.add_clbits(dag.clbits) for register in dag.qregs.values(): dagdependency.add_qreg(register) for register in dag.cregs.values(): dagdependency.add_creg(register) for node in dag.topological_op_nodes(): # Get arguments for classical control (if any) inst = node.op.copy() dagdependency.add_op_node(inst, node.qargs, node.cargs) if create_preds_and_succs: dagdependency._add_predecessors() dagdependency._add_successors() # copy metadata dagdependency.global_phase = dag.global_phase dagdependency.calibrations = dag.calibrations return dagdependency