100 lines
3.4 KiB
Plaintext
100 lines
3.4 KiB
Plaintext
---
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title: Sampler
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description: API reference for qiskit.primitives.Sampler
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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.primitives.Sampler
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---
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# Sampler
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<Class id="qiskit.primitives.Sampler" isDedicatedPage={true} github="https://github.com/qiskit/qiskit/tree/stable/0.45/qiskit/primitives/sampler.py" signature="qiskit.primitives.Sampler(*, options=None)" modifiers="class">
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Bases: [`BaseSampler`](qiskit.primitives.BaseSampler "qiskit.primitives.base.base_sampler.BaseSampler")\[`PrimitiveJob`\[[`SamplerResult`](qiskit.primitives.SamplerResult "qiskit.primitives.base.sampler_result.SamplerResult")]]
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Sampler class.
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[`Sampler`](#qiskit.primitives.Sampler "qiskit.primitives.Sampler") is a reference implementation of [`BaseSampler`](qiskit.primitives.BaseSampler "qiskit.primitives.BaseSampler").
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**Run Options**
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* **shots** (None or int) – The number of shots. If None, it calculates the probabilities. Otherwise, it samples from multinomial distributions.
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* **seed** (np.random.Generator or int) – Set a fixed seed or generator for the multinomial distribution. If shots is None, this option is ignored.
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**Parameters**
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**options** ([*dict*](https://docs.python.org/3/library/stdtypes.html#dict "(in Python v3.12)") *| None*) – Default options.
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**Raises**
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[**QiskitError**](exceptions#qiskit.exceptions.QiskitError "qiskit.exceptions.QiskitError") – if some classical bits are not used for measurements.
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## Attributes
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### circuits
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<Attribute id="qiskit.primitives.Sampler.circuits">
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Quantum circuits to be sampled.
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**Returns**
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The quantum circuits to be sampled.
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</Attribute>
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### options
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<Attribute id="qiskit.primitives.Sampler.options">
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Return options values for the estimator.
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**Returns**
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options
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</Attribute>
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### parameters
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<Attribute id="qiskit.primitives.Sampler.parameters">
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Parameters of quantum circuits.
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**Returns**
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List of the parameters in each quantum circuit.
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</Attribute>
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## Methods
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### run
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<Function id="qiskit.primitives.Sampler.run" signature="run(circuits, parameter_values=None, **run_options)">
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Run the job of the sampling of bitstrings.
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**Parameters**
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* **circuits** ([*QuantumCircuit*](qiskit.circuit.QuantumCircuit "qiskit.circuit.QuantumCircuit") *| Sequence\[*[*QuantumCircuit*](qiskit.circuit.QuantumCircuit "qiskit.circuit.QuantumCircuit")*]*) – One of more circuit objects.
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* **parameter\_values** (*Sequence\[*[*float*](https://docs.python.org/3/library/functions.html#float "(in Python v3.12)")*] | Sequence\[Sequence\[*[*float*](https://docs.python.org/3/library/functions.html#float "(in Python v3.12)")*]] | None*) – Parameters to be bound to the circuit.
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* **run\_options** – Backend runtime options used for circuit execution.
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**Returns**
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The job object of the result of the sampler. The i-th result corresponds to `circuits[i]` evaluated with parameters bound as `parameter_values[i]`.
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**Raises**
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[**ValueError**](https://docs.python.org/3/library/exceptions.html#ValueError "(in Python v3.12)") – Invalid arguments are given.
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**Return type**
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T
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</Function>
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### set\_options
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<Function id="qiskit.primitives.Sampler.set_options" signature="set_options(**fields)">
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Set options values for the estimator.
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**Parameters**
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**\*\*fields** – The fields to update the options
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</Function>
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</Class>
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