Merge pull request Pyomo#3202 from jsiirola/legacy-solver-updates

Update `LegacySolverWrapper` to be compatible with the `pyomo` script

pyomo/contrib/solver/base.py

@@ -19,9 +19,10 @@
 from pyomo.core.base.param import _ParamData
 from pyomo.core.base.block import _BlockData
 from pyomo.core.base.objective import _GeneralObjectiveData
-from pyomo.common.config import document_kwargs_from_configdict
+from pyomo.common.config import document_kwargs_from_configdict, ConfigValue
 from pyomo.common.errors import ApplicationError
 from pyomo.common.deprecation import deprecation_warning
+from pyomo.common.modeling import NOTSET
 from pyomo.opt.results.results_ import SolverResults as LegacySolverResults
 from pyomo.opt.results.solution import Solution as LegacySolution
 from pyomo.core.kernel.objective import minimize
@@ -347,6 +348,11 @@ class LegacySolverWrapper:
     interface. Necessary for backwards compatibility.
     """
 
+    def __init__(self, solver_io=None, **kwargs):
+        if solver_io is not None:
+            raise NotImplementedError('Still working on this')
+        super().__init__(**kwargs)
+
     #
     # Support "with" statements
     #
@@ -358,51 +364,61 @@ def __exit__(self, t, v, traceback):
 
     def _map_config(
         self,
-        tee,
-        load_solutions,
-        symbolic_solver_labels,
-        timelimit,
-        # Report timing is no longer a valid option. We now always return a
-        # timer object that can be inspected.
-        report_timing,
-        raise_exception_on_nonoptimal_result,
-        solver_io,
-        suffixes,
-        logfile,
-        keepfiles,
-        solnfile,
-        options,
+        tee=NOTSET,
+        load_solutions=NOTSET,
+        symbolic_solver_labels=NOTSET,
+        timelimit=NOTSET,
+        report_timing=NOTSET,
+        raise_exception_on_nonoptimal_result=NOTSET,
+        solver_io=NOTSET,
+        suffixes=NOTSET,
+        logfile=NOTSET,
+        keepfiles=NOTSET,
+        solnfile=NOTSET,
+        options=NOTSET,
     ):
         """Map between legacy and new interface configuration options"""
         self.config = self.config()
-        self.config.tee = tee
-        self.config.load_solutions = load_solutions
-        self.config.symbolic_solver_labels = symbolic_solver_labels
-        self.config.time_limit = timelimit
-        self.config.solver_options.set_value(options)
+        if 'report_timing' not in self.config:
+            self.config.declare(
+                'report_timing', ConfigValue(domain=bool, default=False)
+            )
+        if tee is not NOTSET:
+            self.config.tee = tee
+        if load_solutions is not NOTSET:
+            self.config.load_solutions = load_solutions
+        if symbolic_solver_labels is not NOTSET:
+            self.config.symbolic_solver_labels = symbolic_solver_labels
+        if timelimit is not NOTSET:
+            self.config.time_limit = timelimit
+        if report_timing is not NOTSET:
+            self.config.report_timing = report_timing
+        if options is not NOTSET:
+            self.config.solver_options.set_value(options)
         # This is a new flag in the interface. To preserve backwards compatibility,
         # its default is set to "False"
-        self.config.raise_exception_on_nonoptimal_result = (
-            raise_exception_on_nonoptimal_result
-        )
-        if solver_io is not None:
+        if raise_exception_on_nonoptimal_result is not NOTSET:
+            self.config.raise_exception_on_nonoptimal_result = (
+                raise_exception_on_nonoptimal_result
+            )
+        if solver_io is not NOTSET and solver_io is not None:
             raise NotImplementedError('Still working on this')
-        if suffixes is not None:
+        if suffixes is not NOTSET and suffixes is not None:
             raise NotImplementedError('Still working on this')
-        if logfile is not None:
+        if logfile is not NOTSET and logfile is not None:
             raise NotImplementedError('Still working on this')
         if keepfiles or 'keepfiles' in self.config:
             cwd = os.getcwd()
             deprecation_warning(
                 "`keepfiles` has been deprecated in the new solver interface. "
-                "Use `working_dir` instead to designate a directory in which "
-                f"files should be generated and saved. Setting `working_dir` to `{cwd}`.",
+                "Use `working_dir` instead to designate a directory in which files "
+                f"should be generated and saved. Setting `working_dir` to `{cwd}`.",
                 version='6.7.1',
             )
             self.config.working_dir = cwd
         # I believe this currently does nothing; however, it is unclear what
         # our desired behavior is for this.
-        if solnfile is not None:
+        if solnfile is not NOTSET:
             if 'filename' in self.config:
                 filename = os.path.splitext(solnfile)[0]
                 self.config.filename = filename
@@ -504,28 +520,34 @@ def solve(
 
         """
         original_config = self.config
-        self._map_config(
-            tee,
-            load_solutions,
-            symbolic_solver_labels,
-            timelimit,
-            report_timing,
-            raise_exception_on_nonoptimal_result,
-            solver_io,
-            suffixes,
-            logfile,
-            keepfiles,
-            solnfile,
-            options,
+
+        map_args = (
+            'tee',
+            'load_solutions',
+            'symbolic_solver_labels',
+            'timelimit',
+            'report_timing',
+            'raise_exception_on_nonoptimal_result',
+            'solver_io',
+            'suffixes',
+            'logfile',
+            'keepfiles',
+            'solnfile',
+            'options',
         )
+        loc = locals()
+        filtered_args = {k: loc[k] for k in map_args if loc.get(k, None) is not None}
+        self._map_config(**filtered_args)
 
         results: Results = super().solve(model)
         legacy_results, legacy_soln = self._map_results(model, results)
-
         legacy_results = self._solution_handler(
             load_solutions, model, results, legacy_results, legacy_soln
         )
 
+        if self.config.report_timing:
+            print(results.timing_info.timer)
+
         self.config = original_config
 
         return legacy_results
@@ -555,3 +577,13 @@ def license_is_valid(self) -> bool:
 
         """
         return bool(self.available())
+
+    def config_block(self, init=False):
+        from pyomo.scripting.solve_config import default_config_block
+
+        return default_config_block(self, init)[0]
+
+    def set_options(self, options):
+        opts = {k: v for k, v in options.value().items() if v is not None}
+        if opts:
+            self._map_config(**opts)

pyomo/contrib/solver/factory.py

@@ -27,7 +27,9 @@ def decorator(cls):
             class LegacySolver(LegacySolverWrapper, cls):
                 pass
 
-            LegacySolverFactory.register(legacy_name, doc)(LegacySolver)
+            LegacySolverFactory.register(legacy_name, doc + " (new interface)")(
+                LegacySolver
+            )
 
             return cls
 

pyomo/contrib/solver/ipopt.py

@@ -30,7 +30,6 @@
 from pyomo.repn.plugins.nl_writer import NLWriter, NLWriterInfo
 from pyomo.contrib.solver.base import SolverBase
 from pyomo.contrib.solver.config import SolverConfig
-from pyomo.contrib.solver.factory import SolverFactory
 from pyomo.contrib.solver.results import Results, TerminationCondition, SolutionStatus
 from pyomo.contrib.solver.sol_reader import parse_sol_file
 from pyomo.contrib.solver.solution import SolSolutionLoader
@@ -197,7 +196,6 @@ def get_reduced_costs(
 }
 
 
-@SolverFactory.register('ipopt_v2', doc='The ipopt NLP solver (new interface)')
 class Ipopt(SolverBase):
     CONFIG = IpoptConfig()
 

pyomo/contrib/solver/plugins.py

@@ -17,8 +17,8 @@
 
 def load():
     SolverFactory.register(
-        name='ipopt', legacy_name='ipopt_v2', doc='The IPOPT NLP solver (new interface)'
+        name='ipopt', legacy_name='ipopt_v2', doc='The IPOPT NLP solver'
     )(Ipopt)
     SolverFactory.register(
-        name='gurobi', legacy_name='gurobi_v2', doc='New interface to Gurobi'
+        name='gurobi', legacy_name='gurobi_v2', doc='Persistent interface to Gurobi'
     )(Gurobi)

pyomo/contrib/solver/tests/solvers/test_ipopt.py

@@ -48,7 +48,7 @@ def test_ipopt_config(self):
         self.assertIsInstance(config.executable, ExecutableData)
 
         # Test custom initialization
-        solver = SolverFactory('ipopt_v2', executable='/path/to/exe')
+        solver = SolverFactory('ipopt', executable='/path/to/exe')
         self.assertFalse(solver.config.tee)
         self.assertTrue(solver.config.executable.startswith('/path'))
 

pyomo/contrib/solver/tests/unit/test_base.py

@@ -178,7 +178,13 @@ def test_context_manager(self):
 
 class TestLegacySolverWrapper(unittest.TestCase):
     def test_class_method_list(self):
-        expected_list = ['available', 'license_is_valid', 'solve']
+        expected_list = [
+            'available',
+            'config_block',
+            'license_is_valid',
+            'set_options',
+            'solve',
+        ]
         method_list = [
             method
             for method in dir(base.LegacySolverWrapper)
@@ -207,9 +213,7 @@ def test_map_config(self):
         self.assertTrue(instance.config.tee)
         self.assertFalse(instance.config.load_solutions)
         self.assertEqual(instance.config.time_limit, 20)
-        # Report timing shouldn't be created because it no longer exists
-        with self.assertRaises(AttributeError):
-            print(instance.config.report_timing)
+        self.assertEqual(instance.config.report_timing, True)
         # Keepfiles should not be created because we did not declare keepfiles on
         # the original config
         with self.assertRaises(AttributeError):