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Fix the issue where primal solver cannot be used in libmultilabel. #12

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Merged
merged 3 commits into from
Jun 10, 2025
Merged

Fix the issue where primal solver cannot be used in libmultilabel. #12

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25ad033
Fix the issue where primal solver cannot be used in libmultilabel.
zhi-bao Mar 6, 2025
8c1b5e1
Enable the primal solver support.
zhi-bao May 27, 2025
2426a2f
Update the version number and run black formatter
zhi-bao Jun 9, 2025
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8 changes: 5 additions & 3 deletions libmultilabel/linear/linear.py
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Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,7 @@

import numpy as np
import scipy.sparse as sparse
from liblinear.liblinearutil import train, problem, parameter
from liblinear.liblinearutil import train, problem, parameter, solver_names
from tqdm import tqdm

__all__ = [
Expand Down Expand Up @@ -335,7 +335,8 @@ def _do_train(y: np.ndarray, x: sparse.csr_matrix, options: str) -> np.matrix:

prob = problem(y, x)
param = parameter(options)
param.w_recalc = True # only works for solving L1/L2-SVM dual
if param.solver_type in [solver_names.L2R_L1LOSS_SVC_DUAL, solver_names.L2R_L2LOSS_SVC_DUAL]:
param.w_recalc = True # only works for solving L1/L2-SVM dual
with silent_stderr():
model = train(prob, param)

Expand Down Expand Up @@ -597,7 +598,8 @@ def train_binary_and_multiclass(

prob = problem(y, x)
param = parameter(options)
param.w_recalc = True
if param.solver_type in [solver_names.L2R_L1LOSS_SVC_DUAL, solver_names.L2R_L2LOSS_SVC_DUAL]:
param.w_recalc = True
with silent_stderr():
model = train(prob, param)

Expand Down
2 changes: 1 addition & 1 deletion requirements.txt
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@@ -1,4 +1,4 @@
liblinear-multicore
liblinear-multicore>=2.49.0
numba
pandas>1.3.0
PyYAML
Expand Down
4 changes: 2 additions & 2 deletions setup.cfg
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
[metadata]
name = libmultilabel
version = 0.7.2
version = 0.7.3
author = LibMultiLabel Team
license = MIT License
license_file = LICENSE
Expand All @@ -25,7 +25,7 @@ classifiers =
[options]
packages = find:
install_requires =
liblinear-multicore
liblinear-multicore>=2.49.0
numba
pandas>1.3.0
PyYAML
Expand Down