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Python API support for new params #4

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8bcc7ed
New API
rgsl888prabhu Jan 30, 2026
9a8c3c6
remove python tests and remove support for NODE_LIMIT and RELIABILITY…
rgsl888prabhu Jan 30, 2026
007b4e0
Add python API support for missing param mip_batch_pdlp_strong_branching
rgsl888prabhu Jan 30, 2026
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18 changes: 18 additions & 0 deletions python/cuopt/cuopt/linear_programming/solver/solver_parameters.pyx
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Expand Up @@ -57,6 +57,15 @@ cdef extern from "cuopt/linear_programming/constants.h": # noqa
cdef const char* c_CUOPT_MIP_RELATIVE_GAP "CUOPT_MIP_RELATIVE_GAP" # noqa
cdef const char* c_CUOPT_MIP_HEURISTICS_ONLY "CUOPT_MIP_HEURISTICS_ONLY" # noqa
cdef const char* c_CUOPT_MIP_SCALING "CUOPT_MIP_SCALING" # noqa
cdef const char* c_CUOPT_MIP_CUT_PASSES "CUOPT_MIP_CUT_PASSES" # noqa
cdef const char* c_CUOPT_MIP_MIXED_INTEGER_ROUNDING_CUTS "CUOPT_MIP_MIXED_INTEGER_ROUNDING_CUTS" # noqa
cdef const char* c_CUOPT_MIP_MIXED_INTEGER_GOMORY_CUTS "CUOPT_MIP_MIXED_INTEGER_GOMORY_CUTS" # noqa
cdef const char* c_CUOPT_MIP_KNAPSACK_CUTS "CUOPT_MIP_KNAPSACK_CUTS" # noqa
cdef const char* c_CUOPT_MIP_STRONG_CHVATAL_GOMORY_CUTS "CUOPT_MIP_STRONG_CHVATAL_GOMORY_CUTS" # noqa
cdef const char* c_CUOPT_MIP_REDUCED_COST_STRENGTHENING "CUOPT_MIP_REDUCED_COST_STRENGTHENING" # noqa
cdef const char* c_CUOPT_MIP_CUT_CHANGE_THRESHOLD "CUOPT_MIP_CUT_CHANGE_THRESHOLD" # noqa
cdef const char* c_CUOPT_MIP_CUT_MIN_ORTHOGONALITY "CUOPT_MIP_CUT_MIN_ORTHOGONALITY" # noqa
cdef const char* c_CUOPT_MIP_BATCH_PDLP_STRONG_BRANCHING "CUOPT_MIP_BATCH_PDLP_STRONG_BRANCHING" # noqa
cdef const char* c_CUOPT_SOLUTION_FILE "CUOPT_SOLUTION_FILE" # noqa
cdef const char* c_CUOPT_NUM_CPU_THREADS "CUOPT_NUM_CPU_THREADS" # noqa
cdef const char* c_CUOPT_USER_PROBLEM_FILE "CUOPT_USER_PROBLEM_FILE" # noqa
Expand Down Expand Up @@ -99,6 +108,15 @@ CUOPT_MIP_ABSOLUTE_GAP = c_CUOPT_MIP_ABSOLUTE_GAP.decode('utf-8') # noqa
CUOPT_MIP_RELATIVE_GAP = c_CUOPT_MIP_RELATIVE_GAP.decode('utf-8') # noqa
CUOPT_MIP_HEURISTICS_ONLY = c_CUOPT_MIP_HEURISTICS_ONLY.decode('utf-8') # noqa
CUOPT_MIP_SCALING = c_CUOPT_MIP_SCALING.decode('utf-8') # noqa
CUOPT_MIP_CUT_PASSES = c_CUOPT_MIP_CUT_PASSES.decode('utf-8') # noqa
CUOPT_MIP_MIXED_INTEGER_ROUNDING_CUTS = c_CUOPT_MIP_MIXED_INTEGER_ROUNDING_CUTS.decode('utf-8') # noqa
CUOPT_MIP_MIXED_INTEGER_GOMORY_CUTS = c_CUOPT_MIP_MIXED_INTEGER_GOMORY_CUTS.decode('utf-8') # noqa
CUOPT_MIP_KNAPSACK_CUTS = c_CUOPT_MIP_KNAPSACK_CUTS.decode('utf-8') # noqa
CUOPT_MIP_STRONG_CHVATAL_GOMORY_CUTS = c_CUOPT_MIP_STRONG_CHVATAL_GOMORY_CUTS.decode('utf-8') # noqa
CUOPT_MIP_REDUCED_COST_STRENGTHENING = c_CUOPT_MIP_REDUCED_COST_STRENGTHENING.decode('utf-8') # noqa
CUOPT_MIP_CUT_CHANGE_THRESHOLD = c_CUOPT_MIP_CUT_CHANGE_THRESHOLD.decode('utf-8') # noqa
CUOPT_MIP_CUT_MIN_ORTHOGONALITY = c_CUOPT_MIP_CUT_MIN_ORTHOGONALITY.decode('utf-8') # noqa
CUOPT_MIP_BATCH_PDLP_STRONG_BRANCHING = c_CUOPT_MIP_BATCH_PDLP_STRONG_BRANCHING.decode('utf-8') # noqa
CUOPT_SOLUTION_FILE = c_CUOPT_SOLUTION_FILE.decode('utf-8') # noqa
CUOPT_NUM_CPU_THREADS = c_CUOPT_NUM_CPU_THREADS.decode('utf-8') # noqa
CUOPT_USER_PROBLEM_FILE = c_CUOPT_USER_PROBLEM_FILE.decode('utf-8') # noqa
Expand Down
32 changes: 32 additions & 0 deletions python/cuopt/cuopt/linear_programming/solver_settings/solver_settings.py
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Original file line number Diff line number Diff line change
Expand Up @@ -24,11 +24,20 @@
CUOPT_METHOD,
CUOPT_MIP_ABSOLUTE_GAP,
CUOPT_MIP_ABSOLUTE_TOLERANCE,
CUOPT_MIP_BATCH_PDLP_STRONG_BRANCHING,
CUOPT_MIP_CUT_CHANGE_THRESHOLD,
CUOPT_MIP_CUT_MIN_ORTHOGONALITY,
CUOPT_MIP_CUT_PASSES,
CUOPT_MIP_HEURISTICS_ONLY,
CUOPT_MIP_INTEGRALITY_TOLERANCE,
CUOPT_MIP_KNAPSACK_CUTS,
CUOPT_MIP_MIXED_INTEGER_GOMORY_CUTS,
CUOPT_MIP_MIXED_INTEGER_ROUNDING_CUTS,
CUOPT_MIP_REDUCED_COST_STRENGTHENING,
CUOPT_MIP_RELATIVE_GAP,
CUOPT_MIP_RELATIVE_TOLERANCE,
CUOPT_MIP_SCALING,
CUOPT_MIP_STRONG_CHVATAL_GOMORY_CUTS,
CUOPT_NUM_CPU_THREADS,
CUOPT_NUM_GPUS,
CUOPT_ORDERING,
Expand Down Expand Up @@ -374,6 +383,29 @@ def toDict(self):
"mip_heuristics_only": self.get_parameter(
CUOPT_MIP_HEURISTICS_ONLY
),
"mip_cut_passes": self.get_parameter(CUOPT_MIP_CUT_PASSES),
"mip_mixed_integer_rounding_cuts": self.get_parameter(
CUOPT_MIP_MIXED_INTEGER_ROUNDING_CUTS
),
"mip_mixed_integer_gomory_cuts": self.get_parameter(
CUOPT_MIP_MIXED_INTEGER_GOMORY_CUTS
),
"mip_knapsack_cuts": self.get_parameter(CUOPT_MIP_KNAPSACK_CUTS),
"mip_strong_chvatal_gomory_cuts": self.get_parameter(
CUOPT_MIP_STRONG_CHVATAL_GOMORY_CUTS
),
"mip_reduced_cost_strengthening": self.get_parameter(
CUOPT_MIP_REDUCED_COST_STRENGTHENING
),
"mip_cut_change_threshold": self.get_parameter(
CUOPT_MIP_CUT_CHANGE_THRESHOLD
),
"mip_cut_min_orthogonality": self.get_parameter(
CUOPT_MIP_CUT_MIN_ORTHOGONALITY
),
"mip_batch_pdlp_strong_branching": self.get_parameter(
CUOPT_MIP_BATCH_PDLP_STRONG_BRANCHING
),
"num_cpu_threads": self.get_parameter(CUOPT_NUM_CPU_THREADS),
"num_gpus": self.get_parameter(CUOPT_NUM_GPUS),
"augmented": self.get_parameter(CUOPT_AUGMENTED),
Expand Down
45 changes: 45 additions & 0 deletions python/cuopt_server/cuopt_server/utils/linear_programming/data_definition.py
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Original file line number Diff line number Diff line change
Expand Up @@ -450,6 +450,51 @@ class SolverConfig(StrictModel):
description="Set True to run heuristics only, False to run "
"heuristics and branch and bound for MILP",
)
mip_cut_passes: Optional[int] = Field(
default=None,
description="Number of cut passes to make at the root node. "
"Set to 0 to disable cuts, -1 for automatic.",
)
mip_mixed_integer_rounding_cuts: Optional[int] = Field(
default=None,
description="Enable/disable Mixed Integer Rounding (MIR) cuts. "
"Set to -1 for automatic, 0 to disable, 1 to enable.",
)
mip_mixed_integer_gomory_cuts: Optional[int] = Field(
default=None,
description="Enable/disable Mixed Integer Gomory cuts. "
"Set to -1 for automatic, 0 to disable, 1 to enable.",
)
mip_knapsack_cuts: Optional[int] = Field(
default=None,
description="Enable/disable Knapsack cuts. "
"Set to -1 for automatic, 0 to disable, 1 to enable.",
)
mip_strong_chvatal_gomory_cuts: Optional[int] = Field(
default=None,
description="Enable/disable Strong Chvatal-Gomory cuts. "
"Set to -1 for automatic, 0 to disable, 1 to enable.",
)
mip_reduced_cost_strengthening: Optional[int] = Field(
default=None,
description="Enable/disable reduced cost strengthening at the root node. "
"Set to -1 for automatic, 0 to disable, otherwise specifies max number of strengthening rounds.",
)
mip_cut_change_threshold: Optional[float] = Field(
default=None,
description="Threshold for cutting plane objective improvement. "
"Cuts are stopped if improvement falls below this threshold.",
)
mip_cut_min_orthogonality: Optional[float] = Field(
default=None,
description="Minimum orthogonality for cut selection. "
"Value between 0.0 and 1.0.",
)
mip_batch_pdlp_strong_branching: Optional[int] = Field(
default=None,
description="Number of candidates to evaluate in parallel using PDLP "
"during strong branching. Set to 0 to disable.",
)
num_cpu_threads: Optional[int] = Field(
default=None,
description="Set the number of CPU threads to use for branch and bound.", # noqa
Expand Down
52 changes: 52 additions & 0 deletions python/cuopt_server/cuopt_server/utils/linear_programming/solver.py
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Original file line number Diff line number Diff line change
Expand Up @@ -30,11 +30,20 @@
CUOPT_METHOD,
CUOPT_MIP_ABSOLUTE_GAP,
CUOPT_MIP_ABSOLUTE_TOLERANCE,
CUOPT_MIP_BATCH_PDLP_STRONG_BRANCHING,
CUOPT_MIP_CUT_CHANGE_THRESHOLD,
CUOPT_MIP_CUT_MIN_ORTHOGONALITY,
CUOPT_MIP_CUT_PASSES,
CUOPT_MIP_HEURISTICS_ONLY,
CUOPT_MIP_INTEGRALITY_TOLERANCE,
CUOPT_MIP_KNAPSACK_CUTS,
CUOPT_MIP_MIXED_INTEGER_GOMORY_CUTS,
CUOPT_MIP_MIXED_INTEGER_ROUNDING_CUTS,
CUOPT_MIP_REDUCED_COST_STRENGTHENING,
CUOPT_MIP_RELATIVE_GAP,
CUOPT_MIP_RELATIVE_TOLERANCE,
CUOPT_MIP_SCALING,
CUOPT_MIP_STRONG_CHVATAL_GOMORY_CUTS,
CUOPT_NUM_CPU_THREADS,
CUOPT_NUM_GPUS,
CUOPT_ORDERING,
Expand Down Expand Up @@ -388,6 +397,49 @@ def is_mip(var_types):
solver_settings.set_parameter(
CUOPT_CUDSS_DETERMINISTIC, solver_config.cudss_deterministic
)
if solver_config.mip_cut_passes is not None:
solver_settings.set_parameter(
CUOPT_MIP_CUT_PASSES, solver_config.mip_cut_passes
)
if solver_config.mip_mixed_integer_rounding_cuts is not None:
solver_settings.set_parameter(
CUOPT_MIP_MIXED_INTEGER_ROUNDING_CUTS,
solver_config.mip_mixed_integer_rounding_cuts,
)
if solver_config.mip_mixed_integer_gomory_cuts is not None:
solver_settings.set_parameter(
CUOPT_MIP_MIXED_INTEGER_GOMORY_CUTS,
solver_config.mip_mixed_integer_gomory_cuts,
)
if solver_config.mip_knapsack_cuts is not None:
solver_settings.set_parameter(
CUOPT_MIP_KNAPSACK_CUTS, solver_config.mip_knapsack_cuts
)
if solver_config.mip_strong_chvatal_gomory_cuts is not None:
solver_settings.set_parameter(
CUOPT_MIP_STRONG_CHVATAL_GOMORY_CUTS,
solver_config.mip_strong_chvatal_gomory_cuts,
)
if solver_config.mip_reduced_cost_strengthening is not None:
solver_settings.set_parameter(
CUOPT_MIP_REDUCED_COST_STRENGTHENING,
solver_config.mip_reduced_cost_strengthening,
)
if solver_config.mip_cut_change_threshold is not None:
solver_settings.set_parameter(
CUOPT_MIP_CUT_CHANGE_THRESHOLD,
solver_config.mip_cut_change_threshold,
)
if solver_config.mip_cut_min_orthogonality is not None:
solver_settings.set_parameter(
CUOPT_MIP_CUT_MIN_ORTHOGONALITY,
solver_config.mip_cut_min_orthogonality,
)
if solver_config.mip_batch_pdlp_strong_branching is not None:
solver_settings.set_parameter(
CUOPT_MIP_BATCH_PDLP_STRONG_BRANCHING,
solver_config.mip_batch_pdlp_strong_branching,
)
if solver_config.solution_file != "":
warnings.append(ignored_warning("solution_file"))

Expand Down