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Quellcode für qiskit.transpiler.passes.optimization.remove_reset_in_zero_state

# 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.

"""Remove reset gate when the qubit is in zero state."""

from qiskit.circuit import Reset
from qiskit.dagcircuit import DAGInNode
from qiskit.transpiler.basepasses import TransformationPass


[Doku]class RemoveResetInZeroState(TransformationPass): """Remove reset gate when the qubit is in zero state."""
[Doku] def run(self, dag): """Run the RemoveResetInZeroState pass on `dag`. Args: dag (DAGCircuit): the DAG to be optimized. Returns: DAGCircuit: the optimized DAG. """ resets = dag.op_nodes(Reset) for reset in resets: predecessor = next(dag.predecessors(reset)) if isinstance(predecessor, DAGInNode): dag.remove_op_node(reset) return dag