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---
title: AskData
description: API reference for qiskit.algorithms.optimizers.AskData
in_page_toc_min_heading_level: 1
python_api_type: class
python_api_name: qiskit.algorithms.optimizers.AskData
---
# AskData
<Class id="qiskit.algorithms.optimizers.AskData" isDedicatedPage={true} github="https://github.com/qiskit/qiskit/tree/stable/0.23/qiskit/algorithms/optimizers/steppable_optimizer.py" signature="AskData(x_fun=None, x_jac=None)" modifiers="class">
Bases: `abc.ABC`
Base class for return type of [`ask()`](qiskit.algorithms.optimizers.SteppableOptimizer#ask "qiskit.algorithms.optimizers.SteppableOptimizer.ask").
**Parameters**
* **x\_fun** (`Union`\[`float`, `ndarray`, `List`\[`Union`\[`float`, `ndarray`]], `None`]) Point or list of points where the function needs to be evaluated to compute the next
* **optimizer.** (*the next state of the*)
* **x\_jac** (`Union`\[`float`, `ndarray`, `List`\[`Union`\[`float`, `ndarray`]], `None`]) Point or list of points where the gradient/jacobian needs to be evaluated to compute
* **optimizer.**
## Attributes
### x\_fun
<Attribute id="qiskit.algorithms.optimizers.AskData.x_fun" attributeTypeHint="Optional[Union[float, numpy.ndarray, List[Union[float, numpy.ndarray]]]]" attributeValue="None" />
### x\_jac
<Attribute id="qiskit.algorithms.optimizers.AskData.x_jac" attributeTypeHint="Optional[Union[float, numpy.ndarray, List[Union[float, numpy.ndarray]]]]" attributeValue="None" />
</Class>