picos.modeling.strategy¶
Optimization problem solution strategy search.
Classes¶
Strategy¶
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class
picos.modeling.strategy.
Strategy
(problem, solver, *reforms)[source]¶ Bases:
object
Optimization problem solution strategy.
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__init__
(problem, solver, *reforms)[source]¶ Construct a
Strategy
.- Parameters
problem (Problem) – The first step in the solution pipeline; the problem to be solved.
solver (type) – The last step in the solution pipeline; the solver class to be used.
reforms (list(Reformulation)) – Intermediate steps in the pipeline; reformulations to be applied. May not include
ExtraOptions
which is automatically made the first reformulation.
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execute
(**extra_options)[source]¶ Execute the solution strategy.
- Parameters
extra_options – A keyword parameter sequence of additional options (in addition to those of the problem) to use for this search.
- Returns
Solution
to the problem.
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classmethod
from_problem
(problem, **extra_options)[source]¶ Create a solution strategy for the given problem.
- Parameters
problem (Problem) – The optimization problem to search a strategy for.
extra_options – A keyword parameter sequence of additional options (in addition to those of the problem) to assume used.
-
valid
(**extra_options)[source]¶ Whether the solution strategy can be executed.
- Parameters
extra_options – A keyword parameter sequence of additional options (in addition to those of the problem) to assume used.
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property
problem
¶ The problem to be solved.
-
property
reforms
¶ All reformulations in use.
This includes the implicit
ExtraOptions
.
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property
solver
¶ The solver instance in use.
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Exceptions¶
NoStrategyFound¶
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exception
picos.modeling.strategy.
NoStrategyFound
[source]¶ Bases:
RuntimeError
No solution strategy found.
Raised when no viable combination of reformulations and solver to tackle the problem could be found.
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__init__
(*args, **kwargs)¶ Initialize self. See help(type(self)) for accurate signature.
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__new__
(**kwargs)¶ Create and return a new object. See help(type) for accurate signature.
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