qiskit.transpiler.passes.BasicSwap
class BasicSwap(*args, **kwargs)
Map (with minimum effort) a DAGCircuit onto a coupling_map adding swap gates.
The basic mapper is a minimum effort to insert swap gates to map the DAG onto a coupling map. When a cx is not in the coupling map possibilities, it inserts one or more swaps in front to make it compatible.
BasicSwap initializer.
Parameters
coupling_map (CouplingMap) – Directed graph represented a coupling map.
__init__
__init__(coupling_map)
BasicSwap initializer.
Parameters
coupling_map (CouplingMap) – Directed graph represented a coupling map.
Methods
__init__(coupling_map) | BasicSwap initializer. |
name() | Return the name of the pass. |
run(dag) | Run the BasicSwap pass on dag. |
Attributes
is_analysis_pass | Check if the pass is an analysis pass. |
is_transformation_pass | Check if the pass is a transformation pass. |
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).
name
name()
Return the name of the pass.
run
run(dag)
Run the BasicSwap pass on dag.
Parameters
dag (DAGCircuit) – DAG to map.
Returns
A mapped DAG.
Return type
Raises
- TranspilerError – if the coupling map or the layout are not
- compatible with the DAG. –