picos.modeling.strategy¶
Optimization problem solution strategy search.
Exceptions
- 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.
Classes
- class picos.modeling.strategy.Strategy(problem, solver, *reforms)[source]¶
Bases:
object
Optimization problem solution strategy.
- __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.
- 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.
- 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.
- property problem¶
The problem to be solved.
- property reforms¶
All reformulations in use.
This includes the implicit
ExtraOptions
.
- property solver¶
The solver instance in use.