Collect2qBlocks
class qiskit.transpiler.passes.Collect2qBlocks(*args, **kwargs)
Bases: AnalysisPass
Collect two-qubit subcircuits.
Parameters
filter_fn – An optional function that filters collected two-qubit blocks.
Attributes
is_analysis_pass
Check if the pass is an analysis pass.
If the pass is an AnalysisPass, that means that the pass can analyze the DAG and write the results of that analysis in the property set. Modifications on the DAG are not allowed by this kind of pass.
is_transformation_pass
Check if the pass is a transformation pass.
If the pass is a TransformationPass, that means that the pass can manipulate the DAG, but cannot modify the property set (but it can be read).
Methods
execute
execute(passmanager_ir, state, callback=None)
Execute optimization task for input Qiskit IR.
Parameters
- passmanager_ir (Any) – Qiskit IR to optimize.
- state (PassManagerState) – State associated with workflow execution by the pass manager itself.
- callback (Callable | None) – A callback function which is called per execution of optimization task.
Returns
Optimized Qiskit IR and state of the workflow.
Return type
name
run
run(dag)
Run the Collect2qBlocks pass on dag.
The blocks contain “op” nodes in topological order such that all gates in a block act on the same qubits, are adjacent in the circuit, and satisfy the filtering condition (when specified).
After the execution, property_set['block_list'] is set to a list of tuples of “op” node.
update_status
update_status(state, run_state)
Update workflow status.
Parameters
- state (PassManagerState) – Pass manager state to update.
- run_state (RunState) – Completion status of current task.
Returns
Updated pass manager state.
Return type