Solution

class pyomo.contrib.alternative_solutions.solution.Solution(model, variable_list, include_fixed=True, objective=None)[source]

A class to store solutions from a Pyomo model.

variables

A map between Pyomo variables and their values for a solution.

fixed_vars

The set of Pyomo variables that are fixed in a solution.

objective

A map between Pyomo objectives and their values for a solution.

get_variable_name_values(self, ignore_fixed_vars=False):: Get a dictionary of variable name-variable value pairs.

get_objective_name_values(self):: Get a dictionary of objective name-objective value pairs.

__init__(model, variable_list, include_fixed=True, objective=None)[source]

Constructs a Pyomo Solution object.

Parameters:

model (ConcreteModel) – A concrete Pyomo model.
variable_list (A collection of Pyomo _GenereralVarData variables) – The variables for which the solution will be stored.
include_fixed (boolean) – Boolean indicating that fixed variables should be added to the solution.
objective (None or Objective) – The objective functions for which the value will be saved. None indicates that the active objective should be used, but a different objective can be stored as well.

Methods

`__init__`(model, variable_list[, ...])	Constructs a Pyomo Solution object.
`get_fixed_variable_names`()	Get a list of fixed-variable names.
`get_variable_name_values`([include_fixed, ...])	Get a dictionary of variable name-variable value pairs.
`pprint`([round_discrete, sort_keys, indent])	Print the solution variables and objective values.
`to_dict`([round_discrete])
`to_string`([round_discrete, sort_keys, indent])

Attributes

rtype: The value of the objective.

Member Documentation

get_fixed_variable_names()[source]

Get a list of fixed-variable names.

get_variable_name_values(include_fixed=True, round_discrete=True)[source]

Get a dictionary of variable name-variable value pairs.

Parameters:

include_fixed (boolean) – If True, then include fixed variables in the dictionary.
round_discrete (boolean) – If True, then round discrete variable values in the dictionary.

Return type:

Dictionary mapping variable names to variable values.

pprint(round_discrete=True, sort_keys=True, indent=4)[source]

Print the solution variables and objective values.

Parameters:: rounded_discrete (boolean) – If True, then round discrete variable values before printing.