# -*- coding: utf-8 -*-
# This code is part of Qiskit.
#
# (C) Copyright IBM 2017, 2019.
#
# 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.
"""Return the longest path in a DAGcircuit as a list of DAGNodes."""
from qiskit.transpiler.basepasses import AnalysisPass
[docs]class DAGLongestPath(AnalysisPass):
"""Return the longest path in a DAGcircuit as a list of DAGNodes."""
[docs] def run(self, dag):
"""Run the DAGLongestPath pass on `dag`."""
self.property_set['dag_longest_path'] = dag.longest_path()