def __init__(self, **kwargs):
""" Constructor """
executable = kwargs.pop('executable', None)
validate = kwargs.pop('validate', True)
OptSolver.__init__(self, **kwargs)
self._keepfiles = False
self._results_file = None
self._timer = ''
self._user_executable = None
# broadly useful for reporting, and in cases where
# a solver plugin may not report execution time.
self._last_solve_time = None
self._define_signal_handlers = None
if executable is not None:
self.set_executable(name=executable, validate=validate)
def __init__(self, **kwds):
OptSolver.__init__(self, **kwds)
self._pyomo_model = None
"""The pyomo model being solved."""
self._solver_model = None
"""The python instance of the solver model (e.g., the gurobipy Model instance)."""
self._symbol_map = SymbolMap()
"""A symbol map used to map between pyomo components and their names used with the solver."""
self._labeler = None
"""The labeler for creating names for the solver model components."""
self._pyomo_var_to_solver_var_map = ComponentMap()
"""A dictionary mapping pyomo Var's to the solver variables."""
self._pyomo_con_to_solver_con_map = ComponentMap()
"""A dictionary mapping pyomo constraints to solver constraints."""
self._vars_referenced_by_con = ComponentMap()
"""A dictionary mapping constraints to a ComponentSet containt the pyomo variables referenced by that
constraint. This is primarily needed for the persistent solvers. When a constraint is deleted, we need
to decrement the number of times those variables are referenced (see self._referenced_variables)."""
self._vars_referenced_by_obj = ComponentSet()
"""A set containing the pyomo variables referenced by that the objective.
This is primarily needed for the persistent solvers. When a the objective is deleted, we need
to decrement the number of times those variables are referenced (see self._referenced_variables)."""
self._objective = None
"""The pyomo Objective object currently being used with the solver."""
self.results = None
"""A results object return from the solve method."""
self._skip_trivial_constraints = False
"""A bool. If True, then any constraints with a constant body will not be added to the solver model.
Be careful with this. If a trivial constraint is skipped then that constraint cannot be removed from
a persistent solver (an error will be raised if a user tries to remove a non-existent constraint)."""
self._output_fixed_variable_bounds = False
"""A bool. If False then an error will be raised if a fixed variable is used in one of the solver constraints.
This is useful for catching bugs. Ordinarily a fixed variable should appear as a constant value in the
solver constraints. If True, then the error will not be raised."""
self._python_api_exists = False
"""A bool indicating whether or not the python api is available for the specified solver."""
self._version = None
"""The version of the solver."""
self._version_major = None
"""The major version of the solver. For example, if using Gurobi 7.0.2, then _version_major is 7."""
self._symbolic_solver_labels = False
"""A bool. If true then the solver components will be given names corresponding to the pyomo component names."""
self._capabilites = Options()
self._referenced_variables = ComponentMap()
"""dict: {var: count} where count is the number of constraints/objective referencing the var"""
self._keepfiles = False
"""A bool. If True, then the solver log will be saved."""
self._save_results = True
"""A bool. This is used for backwards compatability. If True, the solution will be loaded into the Solution
