GradientBase¶
- class GradientBase(grad_method='param_shift', **kwargs)[código fonte]¶
Bases:
DerivativeBase
Deprecated: Base class for first-order operator gradient.
Convert an operator expression to the first-order gradient.
Obsoleto desde a versão 0.24.0: The class
qiskit.opflow.gradients.gradient_base.GradientBase
is deprecated as of qiskit-terra 0.24.0. It will be removed no earlier than 3 months after the release date. For code migration guidelines, visit https://qisk.it/opflow_migration.- Parâmetros
grad_method (Union[str, CircuitGradient]) – The method used to compute the state/probability gradient. Can be either
'param_shift'
or'lin_comb'
or'fin_diff'
. Ignored for gradients w.r.t observable parameters.kwargs (dict) – Optional parameters for a CircuitGradient
- Levanta
ValueError – If method !=
fin_diff
andepsilon
is not None.
Attributes
- grad_method¶
Returns
CircuitGradient
.- Retorno
CircuitGradient
.