114 lines
4.8 KiB
Plaintext
114 lines
4.8 KiB
Plaintext
---
|
||
title: UnrollForLoops (v1.2)
|
||
description: API reference for qiskit.transpiler.passes.UnrollForLoops in qiskit v1.2
|
||
in_page_toc_min_heading_level: 1
|
||
python_api_type: class
|
||
python_api_name: qiskit.transpiler.passes.UnrollForLoops
|
||
---
|
||
|
||
# UnrollForLoops
|
||
|
||
<Class id="qiskit.transpiler.passes.UnrollForLoops" isDedicatedPage={true} github="https://github.com/Qiskit/qiskit/tree/stable/1.2/qiskit/transpiler/passes/utils/unroll_forloops.py#L21-L68" signature="qiskit.transpiler.passes.UnrollForLoops(*args, **kwargs)" modifiers="class">
|
||
Bases: [`TransformationPass`](qiskit.transpiler.TransformationPass "qiskit.transpiler.basepasses.TransformationPass")
|
||
|
||
`UnrollForLoops` transpilation pass unrolls for-loops when possible.
|
||
|
||
Things like `for x in {0, 3, 4} {rx(x) qr[1];}` will turn into `rx(0) qr[1]; rx(3) qr[1]; rx(4) qr[1];`.
|
||
|
||
<Admonition title="Note" type="note">
|
||
The `UnrollForLoops` unrolls only one level of block depth. No inner loop will be considered by `max_target_depth`.
|
||
</Admonition>
|
||
|
||
**Parameters**
|
||
|
||
**max\_target\_depth** ([*int*](https://docs.python.org/3/library/functions.html#int "(in Python v3.13)")) – Optional. Checks if the unrolled block is over a particular subcircuit depth. To disable the check, use `-1` (Default).
|
||
|
||
## Attributes
|
||
|
||
### is\_analysis\_pass
|
||
|
||
<Attribute id="qiskit.transpiler.passes.UnrollForLoops.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.
|
||
</Attribute>
|
||
|
||
### is\_transformation\_pass
|
||
|
||
<Attribute id="qiskit.transpiler.passes.UnrollForLoops.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).
|
||
</Attribute>
|
||
|
||
## Methods
|
||
|
||
### execute
|
||
|
||
<Function id="qiskit.transpiler.passes.UnrollForLoops.execute" github="https://github.com/Qiskit/qiskit/tree/stable/1.2/qiskit/transpiler/basepasses.py#L189-L211" signature="execute(passmanager_ir, state, callback=None)">
|
||
Execute optimization task for input Qiskit IR.
|
||
|
||
**Parameters**
|
||
|
||
* **passmanager\_ir** ([*Any*](https://docs.python.org/3/library/typing.html#typing.Any "(in Python v3.13)")) – Qiskit IR to optimize.
|
||
* **state** ([*PassManagerState*](qiskit.passmanager.PassManagerState "qiskit.passmanager.compilation_status.PassManagerState")) – State associated with workflow execution by the pass manager itself.
|
||
* **callback** ([*Callable*](https://docs.python.org/3/library/collections.abc.html#collections.abc.Callable "(in Python v3.13)") *| None*) – A callback function which is caller per execution of optimization task.
|
||
|
||
**Returns**
|
||
|
||
Optimized Qiskit IR and state of the workflow.
|
||
|
||
**Return type**
|
||
|
||
[tuple](https://docs.python.org/3/library/stdtypes.html#tuple "(in Python v3.13)")\[[*Any*](https://docs.python.org/3/library/typing.html#typing.Any "(in Python v3.13)"), [qiskit.passmanager.compilation\_status.PassManagerState](qiskit.passmanager.PassManagerState "qiskit.passmanager.compilation_status.PassManagerState")]
|
||
</Function>
|
||
|
||
### name
|
||
|
||
<Function id="qiskit.transpiler.passes.UnrollForLoops.name" github="https://github.com/Qiskit/qiskit/tree/stable/1.2/qiskit/passmanager/base_tasks.py#L68-L70" signature="name()">
|
||
Name of the pass.
|
||
|
||
**Return type**
|
||
|
||
[str](https://docs.python.org/3/library/stdtypes.html#str "(in Python v3.13)")
|
||
</Function>
|
||
|
||
### run
|
||
|
||
<Function id="qiskit.transpiler.passes.UnrollForLoops.run" github="https://github.com/Qiskit/qiskit/tree/stable/1.2/qiskit/transpiler/passes/utils/unroll_forloops.py#L39-L68" signature="run(dag)">
|
||
Run the UnrollForLoops pass on `dag`.
|
||
|
||
**Parameters**
|
||
|
||
**dag** ([*DAGCircuit*](qiskit.dagcircuit.DAGCircuit "qiskit.dagcircuit.DAGCircuit")) – the directed acyclic graph to run on.
|
||
|
||
**Returns**
|
||
|
||
Transformed DAG.
|
||
|
||
**Return type**
|
||
|
||
[DAGCircuit](qiskit.dagcircuit.DAGCircuit "qiskit.dagcircuit.DAGCircuit")
|
||
</Function>
|
||
|
||
### update\_status
|
||
|
||
<Function id="qiskit.transpiler.passes.UnrollForLoops.update_status" github="https://github.com/Qiskit/qiskit/tree/stable/1.2/qiskit/transpiler/basepasses.py#L213-L221" signature="update_status(state, run_state)">
|
||
Update workflow status.
|
||
|
||
**Parameters**
|
||
|
||
* **state** ([*PassManagerState*](qiskit.passmanager.PassManagerState "qiskit.passmanager.compilation_status.PassManagerState")) – Pass manager state to update.
|
||
* **run\_state** (*RunState*) – Completion status of current task.
|
||
|
||
**Returns**
|
||
|
||
Updated pass manager state.
|
||
|
||
**Return type**
|
||
|
||
[*PassManagerState*](qiskit.passmanager.PassManagerState "qiskit.passmanager.compilation_status.PassManagerState")
|
||
</Function>
|
||
</Class>
|
||
|