scikit-learn/scikit-learn

Automatically move `y` (and `sample_weight`) to the same device and namespace as `X` about 6 hours ago

help wanted Array API

66.5K

scikit-learn: machine learning in Python

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Huber Loss for HistGradientBoostingRegressor about 8 hours ago

New Feature help wanted Hard

scikit-learn/scikit-learn

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SequentialFeatureSelector is not working with ColumnTransformer 3 days ago

Bug Moderate help wanted

scikit-learn/scikit-learn

66.5K

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impute.KNNImputer always uses just the mean value 4 days ago

Documentation help wanted module:impute

scikit-learn/scikit-learn

66.5K

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Provide examples on how to customize the scikit-learn classes 5 days ago

Documentation Moderate help wanted

scikit-learn/scikit-learn

66.5K

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HDBSCAN performance issues compared to original hdbscan implementation (likely because Boruvka algorithm is not implemented) 5 days ago

New Feature Performance help wanted Hard

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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LogisticRegression with SAGA using sample_weight does not converge 9 days ago

Bug Moderate help wanted module:linear_model

scikit-learn/scikit-learn

66.5K

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Wrongly implemented test in RidgeCV 12 days ago

Bug Moderate help wanted module:linear_model

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Silhouette score is not defined when the estimator return only 1 cluster 13 days ago

Bug help wanted module:metrics

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Bias correction for TransformedTargetRegressor 19 days ago

Enhancement Moderate help wanted module:compose

scikit-learn/scikit-learn

66.5K

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[idea] extend attributes of RFECV to indicate order of feature elimination 19 days ago

Enhancement Moderate help wanted module:feature_selection

scikit-learn/scikit-learn

66.5K

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Example with ranking metrices 20 days ago

Documentation Moderate help wanted module:metrics

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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cross_validate hang randomly when training svc with polynomial kernel. 25 days ago

Bug help wanted module:svm

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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OneHotEncoder doesn't handle columns with mix of string and int 27 days ago

Enhancement help wanted module:preprocessing

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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partial_dependence() with method recursion computes conditional partial dependence for trees about 1 month ago

Documentation help wanted

scikit-learn/scikit-learn

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NDCG in case of abscence of relevant items about 1 month ago

Bug help wanted

scikit-learn/scikit-learn

66.5K

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Handling of classes with all-zero weights about 1 month ago

Bug help wanted

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Improve tests by using global_random_seed fixture to make them less seed-sensitive about 1 month ago

help wanted Low Priority Hard module:test-suite Meta-issue

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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f_regression takes square root of negative values when constant columns are present about 1 month ago

Bug help wanted module:feature_selection

scikit-learn/scikit-learn

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DOC Progressbar requires to install rich about 1 month ago

Documentation good first issue Callbacks

scikit-learn/scikit-learn

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GaussianProcessRegressor multi-output underlying mechanics? about 2 months ago

Documentation help wanted module:gaussian_process

scikit-learn/scikit-learn

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scikit-learn: machine learning in Python

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Allow batch based metrics calculation of sklearn.metrics about 2 months ago

Performance help wanted module:metrics Needs Investigation

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Enable warnings on travis (and make sure they are reasonable) about 2 months ago

Build / CI help wanted module:test-suite

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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calinski_harabaz_score not used in any example, unclear when to use about 2 months ago

Documentation help wanted module:metrics

scikit-learn/scikit-learn

66.5K

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Re-evaluate memory usage in CountVectorizer about 2 months ago

help wanted Needs Benchmarks module:feature_extraction

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Evaluate multi-threading `LogisticRegression` 2 months ago

API help wanted Needs Benchmarks

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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FEA Add missing-value support to sparse splitter in RandomForest and ExtraTrees 2 months ago

help wanted module:tree cython

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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More details about the Crammer-Singer method for LinearSVM 2 months ago

Documentation help wanted Needs Benchmarks module:svm

scikit-learn/scikit-learn

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Better documentation for n_jobs 2 months ago

Documentation Moderate help wanted

scikit-learn/scikit-learn

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[DOC] Outdated description of attributes oob_decision_function_ and oob_prediction_ in bagging estimators 3 months ago

Regression help wanted

scikit-learn/scikit-learn

66.5K

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make_column_selector: support for cardinality selection 3 months ago

help wanted module:compose

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Inconsistent results with HalvingGridSearchCV 3 months ago

Documentation help wanted module:model_selection

scikit-learn/scikit-learn

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VotingClassifier estimators_ are based on transformed labels 3 months ago

Bug Documentation help wanted module:ensemble

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Bug: BaggingClassifier for multiclass usage 3 months ago

Bug help wanted module:ensemble Needs Reproducible Code

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Perplexity not monotonically decreasing for batch Latent Dirichlet Allocation 3 months ago

Bug help wanted module:decomposition Needs Reproducible Code

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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has_fit_parameter will not work with **kwargs 3 months ago

Enhancement help wanted

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Dictionary learning is slower with n_jobs > 1 3 months ago

Performance help wanted module:decomposition

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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scikit-learn/sklearn/manifold/locally_linear.py could have a parameter for metric type 3 months ago

Enhancement help wanted module:manifold

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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LatentDirichletAllocation uses inconsistent normalization for test perplexity in the components_ variable 3 months ago

Bug help wanted module:decomposition

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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doctest SpectralCoclustering fails on Ubuntu arm64 3 months ago

help wanted module:cluster arch:arm module:test-suite

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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BUG: StandardScaler partial_fit overflows 3 months ago

Bug Moderate help wanted module:preprocessing

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Investigate SAG/SAGA solver 4 months ago

Bug Moderate help wanted module:linear_model

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Incorrect calculations of homogeneity, completeness and v-measure 4 months ago

Bug help wanted module:metrics

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Improve near constant feature detection in scalers 4 months ago

Enhancement help wanted module:preprocessing

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Fix ConvergenceWarning in `plot_gpr_on_structured_data.py` example 4 months ago

help wanted Needs Investigation

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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[RFC] Tree module improvements 4 months ago

Enhancement Moderate help wanted module:tree

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Scoring functions don't know classes_ 4 months ago

API help wanted

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Metrics which are degenerate with a single sample should raise an error if passed a single sample 4 months ago

help wanted module:metrics

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Give feedback when `svm.SVC` is configured with kernel hyperparameters for a different kernel 4 months ago

New Feature help wanted module:svm

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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KBinsDiscretizer: allow nans 4 months ago

Enhancement help wanted module:preprocessing

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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extract_patches_2d max_patches param behaviours 4 months ago

Moderate help wanted module:feature_extraction

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Missing Data Imputation with a Gaussian Mixture Model using EM 4 months ago

help wanted module:mixture

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Support Mini-Batch gradient descent 4 months ago

New Feature Moderate help wanted module:linear_model

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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MLPClassifier supports fitting on multilabel output but cannot be used with partial_fit 4 months ago

Moderate help wanted module:neural_network

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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sample_weight for lasso, elastic etc 4 months ago

Enhancement Moderate help wanted module:linear_model

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Memory scalability issues in univariate feature selection 5 months ago

Enhancement Performance help wanted module:feature_selection

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Implementing partial_fit for NearestCentroid 5 months ago

Easy Enhancement help wanted module:neighbors

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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inverse_transform of SimpleImputer with empty features changes order of columns 5 months ago

Bug help wanted

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Request: references for plot_svm_scale_c 6 months ago

Documentation help wanted module:svm

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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No hyperparameter optimization example/tutorial incorporating warmstart 6 months ago

Documentation help wanted

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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AdaBoost feature_importances_ should support base estimators with coef_ 6 months ago

Easy Enhancement help wanted module:ensemble

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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CI Migrate Azure CI to GitHub Actions 6 months ago

Build / CI help wanted

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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[request] Reference for Agglomerative Clustering 6 months ago

Documentation help wanted module:cluster

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Make `zero_division` parameter consistent in the different metric 7 months ago

Enhancement help wanted

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Make `_check_n_features` and `_check_feature_names` public 7 months ago

Easy Documentation help wanted

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Windows free-threaded Python ValueError: concurrent send_bytes() calls are not supported 7 months ago

Bug help wanted Needs Investigation free-threading OS:Windows

scikit-learn/scikit-learn

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scikit-learn: machine learning in Python

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Provide wheel for Windows ARM64 7 months ago

Build / CI help wanted

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Cannot recover DBSCAN from memory-overuse 7 months ago

Bug help wanted Hard Needs Reproducible Code Needs Investigation

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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RFC: Potential improvement of HTML Display's css logic 7 months ago

help wanted RFC

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Unexpected behavior of the HTML repr of meta-estimators 7 months ago

Documentation help wanted frontend

scikit-learn/scikit-learn

66.5K

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Update numpydoc version in the CI 7 months ago

help wanted Needs Triage

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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sample_weight is silently ignored in LogisticRegressionCV.score when metadata routing is enabled 7 months ago

Bug help wanted Metadata Routing

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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AI tools like Copilot Coding Agent don't know about / don't respect our Automated Contributions Policy 7 months ago

help wanted RFC

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Array API backends support for MLX 7 months ago

New Feature help wanted Needs Investigation Array API

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Reuse the `pre-commit` linter config in the CI runners 7 months ago

Build / CI help wanted

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Agglomerative clustering training error for seuclidean/mahalanobis affinity and single linkage 7 months ago

Bug help wanted

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Update ml_map.png 8 months ago

AI Summary: The `ml_map.png` diagram, which illustrates various machine learning algorithms, requires an update. This is due to the deprecation of the GMM and VBGMM classes from the library. The issue creator is seeking help to locate the original source file (e.g., GIMP file) needed to correctly modify the image.

Complexity: 2/5

help wanted

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Array API support for CalibratedClassifierCV 8 months ago

New Feature help wanted Hard module:calibration Array API

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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coclust package has much better results on benchmark datasets 9 months ago

Performance help wanted Needs Benchmarks

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Support large sparse matrices in SVC/SVR 9 months ago

Enhancement help wanted module:svm

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Use absolute imports in Cython code 9 months ago

good first issue help wanted Meta-issue

scikit-learn/scikit-learn

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scikit-learn: machine learning in Python

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Replace hard-coded "10%" with validation_fraction in MLPClassifier docstring 9 months ago

Documentation help wanted

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scikit-learn: machine learning in Python

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RandomForest{Classifier,Regressor} split criterion documentation 9 months ago

Documentation help wanted

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Bad error messages in ClassifierChain on multioutput multiclass 10 months ago

good first issue module:multioutput

scikit-learn/scikit-learn

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scikit-learn: machine learning in Python

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```TargetEncoder``` should take ```groups``` as an argument 10 months ago

Enhancement help wanted

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Crash in T-SNE 10 months ago

Bug help wanted module:manifold cython

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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SVC and OneClassSVM fails to fit or have wrong fitted attributes with null sample weights 10 months ago

Bug help wanted Hard

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Adding more functionality to DecisionBoundaryDisplay 10 months ago

good first issue

scikit-learn/scikit-learn

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scikit-learn: machine learning in Python

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ENH Add `pos_label` parameter to `TargetEncoder` 10 months ago

Enhancement good first issue

scikit-learn/scikit-learn

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scikit-learn: machine learning in Python

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Trees with MAE criterion are slow to train 10 months ago

Performance help wanted module:ensemble

scikit-learn/scikit-learn

66.5K

scikit-learn: machine learning in Python

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Revisit the "chance level" for the different displays 11 months ago

Documentation API good first issue

scikit-learn/scikit-learn

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scikit-learn: machine learning in Python

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Improve tests to make them run on variously typed data using the `global_dtype` fixture 11 months ago

help wanted Hard module:test-suite Meta-issue float32

scikit-learn/scikit-learn

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scikit-learn: machine learning in Python

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AttributeError: This 'LabelEncoder' has no attribute 'set_output' 11 months ago

Bug Documentation good first issue help wanted

scikit-learn/scikit-learn

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scikit-learn: machine learning in Python

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Please provide option to set unknown_values during test time to same as encoded min_frequency in OrdinalEncoder(Infrequent categories) 11 months ago

New Feature help wanted Hard

scikit-learn/scikit-learn

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scikit-learn: machine learning in Python

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⚠️ CI failed on Linux_Runs.pylatest_conda_forge_mkl (last failure: Jul 09, 2025) ⚠️ about 1 year ago

AI Summary: Investigate and resolve a CI failure on the scikit-learn project's Linux_Runs.pylatest_conda_forge_mkl build, which resulted in a test collection failure on July 9, 2025. This involves reviewing the Azure DevOps build logs to identify the root cause of the test failures and implementing a fix.

Complexity: 4/5

help wanted Needs Triage

scikit-learn/scikit-learn

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