Unroller#

class qiskit.transpiler.passes.Unroller(*args, **kwargs)[source]#

Bases: TransformationPass

Unroll a circuit to a given basis.

Unroll (expand) non-basis, non-opaque instructions recursively to a desired basis, using decomposition rules defined for each instruction.

Unroller initializer.

প্যারামিটার:

  • basis (list[str] or None) -- Target basis names to unroll to, e.g. ['u3', 'cx'] . If None, does not unroll any gate.

  • target (Target) -- The Target representing the target backend, if both basis and this are specified then this argument will take precedence and basis will be ignored.

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

name()#

Return the name of the pass.

run(dag)[source]#

Run the Unroller pass on dag.

প্যারামিটার:

dag (DAGCircuit) -- input dag

রেইজেস:

  • QiskitError -- if unable to unroll given the basis due to undefined

  • decomposition rules (such as a bad basis) or excessive recursion. --

রিটার্নস:

output unrolled dag

রিটার্ন টাইপ:

DAGCircuit