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count_ops.py
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/
count_ops.py
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# 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.
"""Count the operations in a DAG circuit."""
from qiskit.transpiler.basepasses import AnalysisPass
class CountOps(AnalysisPass):
"""Count the operations in a DAG circuit.
The result is saved in ``property_set['count_ops']`` as an integer.
"""
def __init__(self, *, recurse=True):
super().__init__()
self.recurse = recurse
def run(self, dag):
"""Run the CountOps pass on `dag`."""
self.property_set["count_ops"] = dag.count_ops(recurse=self.recurse)