39 lines
1.6 KiB
Plaintext
39 lines
1.6 KiB
Plaintext
---
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title: ConverterBase (v0.31)
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description: API reference for qiskit.opflow.converters.ConverterBase in qiskit v0.31
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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.opflow.converters.ConverterBase
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---
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# ConverterBase
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<Class id="qiskit.opflow.converters.ConverterBase" isDedicatedPage={true} github="https://github.com/qiskit/qiskit/tree/stable/0.18/qiskit/opflow/converters/converter_base.py" signature="ConverterBase" modifiers="class">
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Bases: `abc.ABC`
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Converters take an Operator and return a new Operator, generally isomorphic in some way with the first, but with certain desired properties. For example, a converter may accept `CircuitOp` and return a `SummedOp` of `PauliOps` representing the circuit unitary. Converters may not have polynomial space or time scaling in their operations. On the contrary, many converters, such as a `MatrixExpectation` or `MatrixEvolution`, which convert `PauliOps` to `MatrixOps` internally, will require time or space exponential in the number of qubits unless a clever trick is known (such as the use of sparse matrices).
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## Methods Defined Here
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<span id="qiskit-opflow-converters-converterbase-convert" />
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### convert
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<Function id="qiskit.opflow.converters.ConverterBase.convert" signature="ConverterBase.convert(operator)" modifiers="abstract">
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Accept the Operator and return the converted Operator
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**Parameters**
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**operator** (`OperatorBase`) – The Operator to convert.
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**Return type**
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`OperatorBase`
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**Returns**
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The converted Operator.
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</Function>
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</Class>
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