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---
title: EigenstateResult
description: API reference for qiskit.chemistry.results.EigenstateResult
in_page_toc_min_heading_level: 1
python_api_type: class
python_api_name: qiskit.chemistry.results.EigenstateResult
---
# qiskit.chemistry.results.EigenstateResult
<Class id="qiskit.chemistry.results.EigenstateResult" isDedicatedPage={true} github="https://github.com/qiskit-community/qiskit-aqua/tree/stable/0.9/qiskit/chemistry/results/eigenstate_result.py" signature="EigenstateResult(a_dict=None)" modifiers="class">
The eigenstate result interface.
### \_\_init\_\_
<Function id="qiskit.chemistry.results.EigenstateResult.__init__" signature="__init__(a_dict=None)">
Initialize self. See help(type(self)) for accurate signature.
</Function>
## Methods
| | |
| ------------------------------------------------------------------------------------------------------------------------------------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| [`__init__`](#qiskit.chemistry.results.EigenstateResult.__init__ "qiskit.chemistry.results.EigenstateResult.__init__")(\[a\_dict]) | Initialize self. |
| [`clear`](#qiskit.chemistry.results.EigenstateResult.clear "qiskit.chemistry.results.EigenstateResult.clear")() | **rtype**`None` |
| [`combine`](#qiskit.chemistry.results.EigenstateResult.combine "qiskit.chemistry.results.EigenstateResult.combine")(result) | Any property from the argument that exists in the receiver is updated. |
| `copy`() | |
| `fromkeys`(iterable\[, value]) | |
| [`get`](#qiskit.chemistry.results.EigenstateResult.get "qiskit.chemistry.results.EigenstateResult.get")(k\[,d]) | |
| [`items`](#qiskit.chemistry.results.EigenstateResult.items "qiskit.chemistry.results.EigenstateResult.items")() | |
| [`keys`](#qiskit.chemistry.results.EigenstateResult.keys "qiskit.chemistry.results.EigenstateResult.keys")() | |
| [`pop`](#qiskit.chemistry.results.EigenstateResult.pop "qiskit.chemistry.results.EigenstateResult.pop")(key\[, default]) | If key is not found, d is returned if given, otherwise KeyError is raised. |
| [`popitem`](#qiskit.chemistry.results.EigenstateResult.popitem "qiskit.chemistry.results.EigenstateResult.popitem")() | as a 2-tuple; but raise KeyError if D is empty. |
| [`setdefault`](#qiskit.chemistry.results.EigenstateResult.setdefault "qiskit.chemistry.results.EigenstateResult.setdefault")(k\[,d]) | |
| [`update`](#qiskit.chemistry.results.EigenstateResult.update "qiskit.chemistry.results.EigenstateResult.update")(\*args, \*\*kwargs) | If E present and has a .keys() method, does: for k in E: D\[k] = E\[k] If E present and lacks .keys() method, does: for (k, v) in E: D\[k] = v In either case, this is followed by: for k, v in F.items(): D\[k] = v |
| [`values`](#qiskit.chemistry.results.EigenstateResult.values "qiskit.chemistry.results.EigenstateResult.values")() | |
## Attributes
| | |
| ---------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------- |
| [`aux_operator_eigenvalues`](#qiskit.chemistry.results.EigenstateResult.aux_operator_eigenvalues "qiskit.chemistry.results.EigenstateResult.aux_operator_eigenvalues") | return aux operator eigen values |
| [`eigenenergies`](#qiskit.chemistry.results.EigenstateResult.eigenenergies "qiskit.chemistry.results.EigenstateResult.eigenenergies") | returns eigen energies |
| [`eigenstates`](#qiskit.chemistry.results.EigenstateResult.eigenstates "qiskit.chemistry.results.EigenstateResult.eigenstates") | returns eigen states |
| [`groundenergy`](#qiskit.chemistry.results.EigenstateResult.groundenergy "qiskit.chemistry.results.EigenstateResult.groundenergy") | returns ground energy |
| [`groundstate`](#qiskit.chemistry.results.EigenstateResult.groundstate "qiskit.chemistry.results.EigenstateResult.groundstate") | returns ground state |
| [`raw_result`](#qiskit.chemistry.results.EigenstateResult.raw_result "qiskit.chemistry.results.EigenstateResult.raw_result") | Returns the raw algorithm result. |
### aux\_operator\_eigenvalues
<Attribute id="qiskit.chemistry.results.EigenstateResult.aux_operator_eigenvalues">
return aux operator eigen values
**Return type**
`Optional`\[`List`\[`float`]]
</Attribute>
### clear
<Function id="qiskit.chemistry.results.EigenstateResult.clear" signature="clear()">
**Return type**
`None`
</Function>
### combine
<Function id="qiskit.chemistry.results.EigenstateResult.combine" signature="combine(result)">
Any property from the argument that exists in the receiver is updated. :type result: `AlgorithmResult` :param result: Argument result with properties to be set.
**Raises**
**TypeError** Argument is None
**Return type**
`None`
</Function>
### eigenenergies
<Attribute id="qiskit.chemistry.results.EigenstateResult.eigenenergies">
returns eigen energies
**Return type**
`Optional`\[`ndarray`]
</Attribute>
### eigenstates
<Attribute id="qiskit.chemistry.results.EigenstateResult.eigenstates">
returns eigen states
**Return type**
`Optional`\[`List`\[`Union`\[`str`, `dict`, `Result`, `list`, `ndarray`, `Statevector`, `QuantumCircuit`, `Instruction`, `OperatorBase`]]]
</Attribute>
### get
<Function id="qiskit.chemistry.results.EigenstateResult.get" signature="get(k[, d]) → D[k] if k in D, else d. d defaults to None." />
### groundenergy
<Attribute id="qiskit.chemistry.results.EigenstateResult.groundenergy">
returns ground energy
**Return type**
`Optional`\[`float`]
</Attribute>
### groundstate
<Attribute id="qiskit.chemistry.results.EigenstateResult.groundstate">
returns ground state
**Return type**
`Union`\[`str`, `dict`, `Result`, `list`, `ndarray`, `Statevector`, `QuantumCircuit`, `Instruction`, `OperatorBase`, `None`]
</Attribute>
### items
<Function id="qiskit.chemistry.results.EigenstateResult.items" signature="items() → a set-like object providing a view on Ds items" />
### keys
<Function id="qiskit.chemistry.results.EigenstateResult.keys" signature="keys() → a set-like object providing a view on Ds keys" />
### pop
<Function id="qiskit.chemistry.results.EigenstateResult.pop" signature="pop(key, default=None)">
If key is not found, d is returned if given, otherwise KeyError is raised.
**Return type**
`object`
</Function>
### popitem
<Function id="qiskit.chemistry.results.EigenstateResult.popitem" signature="popitem()">
as a 2-tuple; but raise KeyError if D is empty.
**Return type**
`Tuple`\[`object`, `object`]
</Function>
### raw\_result
<Attribute id="qiskit.chemistry.results.EigenstateResult.raw_result">
Returns the raw algorithm result.
**Return type**
`Optional`\[`AlgorithmResult`]
</Attribute>
### setdefault
<Function id="qiskit.chemistry.results.EigenstateResult.setdefault" signature="setdefault(k[, d]) → D.get(k,d), also set D[k]=d if k not in D" />
### update
<Function id="qiskit.chemistry.results.EigenstateResult.update" signature="update(*args, **kwargs)">
If E present and has a .keys() method, does: for k in E: D\[k] = E\[k] If E present and lacks .keys() method, does: for (k, v) in E: D\[k] = v In either case, this is followed by: for k, v in F.items(): D\[k] = v
**Return type**
`None`
</Function>
### values
<Function id="qiskit.chemistry.results.EigenstateResult.values" signature="values() → an object providing a view on Ds values" />
</Class>