PassManagerConfig

class qiskit.transpiler.PassManagerConfig(initial_layout=None, basis_gates=None, coupling_map=None, layout_method=None, routing_method=None, translation_method=None, scheduling_method=None, instruction_durations=None, approximation_degree=None, seed_transpiler=None, timing_constraints=None, unitary_synthesis_method='default', unitary_synthesis_plugin_config=None, target=None, hls_config=None, init_method=None, optimization_method=None, qubits_initially_zero=True)

Bases: object

Pass Manager Configuration.

Initialize a PassManagerConfig object

Parameters

• initial_layout (Layout | None) – Initial position of virtual qubits on physical qubits.
• basis_gates (list[str] | None) – List of basis gate names to unroll to.
• coupling_map (CouplingMap | None) – Directed graph representing a coupling map.
• layout_method (str | None) – the pass to use for choosing initial qubit placement. This will be the plugin name if an external layout stage plugin is being used.
• routing_method (str | None) – the pass to use for routing qubits on the architecture. This will be a plugin name if an external routing stage plugin is being used.
• translation_method (str | None) – the pass to use for translating gates to basis_gates. This will be a plugin name if an external translation stage plugin is being used.
• scheduling_method (str | None) – the pass to use for scheduling instructions. This will be a plugin name if an external scheduling stage plugin is being used.
• instruction_durations (InstructionDurations | None) – Dictionary of duration (in dt) for each instruction.
• approximation_degree (float | None) – Heuristic dial used for circuit approximation, where 1.0 means no approximation (up to numerical tolerance) and 0.0 means the maximum approximation. If target is available, a value of None indicates that approximation is allowed up to the reported error rate for an operation in the target.
• seed_transpiler (int | None) – Sets random seed for the stochastic parts of the transpiler.
• timing_constraints (TimingConstraints | None) – Hardware time alignment restrictions.
• unitary_synthesis_method (str) – The string method to use for the UnitarySynthesis pass. Will search installed plugins for a valid method. You can see a list of installed plugins with unitary_synthesis_plugin_names().
• unitary_synthesis_plugin_config (dict | None) – The configuration dictionary that will be passed to the specified unitary synthesis plugin. Refer to the plugin documentation for how to use this.
• target (Target | None) – The backend target
• hls_config (HLSConfig | None) – An optional configuration class to use for HighLevelSynthesis pass. Specifies how to synthesize various high-level objects.
• init_method (str | None) – The plugin name for the init stage plugin to use
• optimization_method (str | None) – The plugin name for the optimization stage plugin to use.
• qubits_initially_zero (bool) – Indicates whether the input circuit is zero-initialized.

Methods

from_backend