32 lines
1.6 KiB
Plaintext
32 lines
1.6 KiB
Plaintext
---
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title: TellData
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description: API reference for qiskit.algorithms.optimizers.TellData
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in_page_toc_min_heading_level: 1
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python_api_type: class
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python_api_name: qiskit.algorithms.optimizers.TellData
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---
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# TellData
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<Class id="qiskit.algorithms.optimizers.TellData" isDedicatedPage={true} github="https://github.com/qiskit/qiskit/tree/stable/0.25/qiskit/algorithms/optimizers/steppable_optimizer.py" signature="qiskit.algorithms.optimizers.TellData(eval_fun=None, eval_jac=None)" modifiers="class">
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Bases: [`ABC`](https://docs.python.org/3/library/abc.html#abc.ABC "(in Python v3.12)")
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Base class for argument type of [`tell()`](qiskit.algorithms.optimizers.SteppableOptimizer#tell "qiskit.algorithms.optimizers.SteppableOptimizer.tell").
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**Parameters**
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* **eval\_fun** ([*float*](https://docs.python.org/3/library/functions.html#float "(in Python v3.12)") *|*[*list*](https://docs.python.org/3/library/stdtypes.html#list "(in Python v3.12)")*\[*[*float*](https://docs.python.org/3/library/functions.html#float "(in Python v3.12)")*] | None*) – Image of the function at `x_fun`.
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* **eval\_jac** (*POINT |* [*list*](https://docs.python.org/3/library/stdtypes.html#list "(in Python v3.12)")*\[POINT] | None*) – Image of the gradient-jacobian at `x_jac`.
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## Attributes
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### eval\_fun
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<Attribute id="qiskit.algorithms.optimizers.TellData.eval_fun" attributeTypeHint="float | list[float] | None" attributeValue="None" />
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### eval\_jac
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<Attribute id="qiskit.algorithms.optimizers.TellData.eval_jac" attributeTypeHint="POINT | list[POINT] | None" attributeValue="None" />
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</Class>
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