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https://github.com/scikit-learn/scikit-learn/issues/32115
[ "New Feature", "module:cluster", "Needs Decision - Include Feature" ]
[ENH] Adding KModes and KPrototypes clustering algorithms ### Describe the workflow you want to enable Currently, scikit-learn users working with datasets that contain categorical features (e.g., `country`, `profession`, `product_type`) face a significant hurdle. The standard practice is to use one-hot encoding befor...
32,115
https://github.com/scikit-learn/scikit-learn/issues/32115
[ "New Feature", "module:cluster", "Needs Decision - Include Feature" ]
[ENH] Adding KModes and KPrototypes clustering algorithms ### Describe the workflow you want to enable Currently, scikit-learn users working with datasets that contain categorical features (e.g., `country`, `profession`, `product_type`) face a significant hurdle. The standard practice is to use one-hot encoding befor...
32,115
https://github.com/scikit-learn/scikit-learn/issues/32115
[ "New Feature", "module:cluster", "Needs Decision - Include Feature" ]
[ENH] Adding KModes and KPrototypes clustering algorithms ### Describe the workflow you want to enable Currently, scikit-learn users working with datasets that contain categorical features (e.g., `country`, `profession`, `product_type`) face a significant hurdle. The standard practice is to use one-hot encoding befor...
32,115
https://github.com/scikit-learn/scikit-learn/issues/32115
[ "New Feature", "module:cluster", "Needs Decision - Include Feature" ]
[ENH] Adding KModes and KPrototypes clustering algorithms ### Describe the workflow you want to enable Currently, scikit-learn users working with datasets that contain categorical features (e.g., `country`, `profession`, `product_type`) face a significant hurdle. The standard practice is to use one-hot encoding befor...
32,115
https://github.com/scikit-learn/scikit-learn/issues/32115
[ "New Feature", "module:cluster", "Needs Decision - Include Feature" ]
[ENH] Adding KModes and KPrototypes clustering algorithms ### Describe the workflow you want to enable Currently, scikit-learn users working with datasets that contain categorical features (e.g., `country`, `profession`, `product_type`) face a significant hurdle. The standard practice is to use one-hot encoding befor...
32,115
https://github.com/scikit-learn/scikit-learn/issues/32115
[ "New Feature", "module:cluster", "Needs Decision - Include Feature" ]
[ENH] Adding KModes and KPrototypes clustering algorithms ### Describe the workflow you want to enable Currently, scikit-learn users working with datasets that contain categorical features (e.g., `country`, `profession`, `product_type`) face a significant hurdle. The standard practice is to use one-hot encoding befor...
32,115
https://github.com/scikit-learn/scikit-learn/issues/32115
[ "New Feature", "module:cluster", "Needs Decision - Include Feature" ]
[ENH] Adding KModes and KPrototypes clustering algorithms ### Describe the workflow you want to enable Currently, scikit-learn users working with datasets that contain categorical features (e.g., `country`, `profession`, `product_type`) face a significant hurdle. The standard practice is to use one-hot encoding befor...
32,115
https://github.com/scikit-learn/scikit-learn/issues/32115
[ "New Feature", "module:cluster", "Needs Decision - Include Feature" ]
[ENH] Adding KModes and KPrototypes clustering algorithms ### Describe the workflow you want to enable Currently, scikit-learn users working with datasets that contain categorical features (e.g., `country`, `profession`, `product_type`) face a significant hurdle. The standard practice is to use one-hot encoding befor...
32,115
https://github.com/scikit-learn/scikit-learn/issues/32115
[ "New Feature", "module:cluster", "Needs Decision - Include Feature" ]
[ENH] Adding KModes and KPrototypes clustering algorithms ### Describe the workflow you want to enable Currently, scikit-learn users working with datasets that contain categorical features (e.g., `country`, `profession`, `product_type`) face a significant hurdle. The standard practice is to use one-hot encoding befor...
32,115
https://github.com/scikit-learn/scikit-learn/issues/32112
[ "API", "RFC", "module:compose", "module:pipeline" ]
RFC Deprecate FeatureUnion and make_union Unless I'm missing something, to me `FeatureUnion` is just a `ColumnTransformer` where all transformers are applied to all features. So it's just a special case of `ColumnTransformer`. ```py import pandas as pd from sklearn.pipeline import FeatureUnion from sklearn.compose im...
32,112
https://github.com/scikit-learn/scikit-learn/issues/32112
[ "API", "RFC", "module:compose", "module:pipeline" ]
RFC Deprecate FeatureUnion and make_union Unless I'm missing something, to me `FeatureUnion` is just a `ColumnTransformer` where all transformers are applied to all features. So it's just a special case of `ColumnTransformer`. ```py import pandas as pd from sklearn.pipeline import FeatureUnion from sklearn.compose im...
32,112
https://github.com/scikit-learn/scikit-learn/issues/32112
[ "API", "RFC", "module:compose", "module:pipeline" ]
RFC Deprecate FeatureUnion and make_union Unless I'm missing something, to me `FeatureUnion` is just a `ColumnTransformer` where all transformers are applied to all features. So it's just a special case of `ColumnTransformer`. ```py import pandas as pd from sklearn.pipeline import FeatureUnion from sklearn.compose im...
32,112
https://github.com/scikit-learn/scikit-learn/issues/32112
[ "API", "RFC", "module:compose", "module:pipeline" ]
RFC Deprecate FeatureUnion and make_union Unless I'm missing something, to me `FeatureUnion` is just a `ColumnTransformer` where all transformers are applied to all features. So it's just a special case of `ColumnTransformer`. ```py import pandas as pd from sklearn.pipeline import FeatureUnion from sklearn.compose im...
32,112
https://github.com/scikit-learn/scikit-learn/issues/32112
[ "API", "RFC", "module:compose", "module:pipeline" ]
RFC Deprecate FeatureUnion and make_union Unless I'm missing something, to me `FeatureUnion` is just a `ColumnTransformer` where all transformers are applied to all features. So it's just a special case of `ColumnTransformer`. ```py import pandas as pd from sklearn.pipeline import FeatureUnion from sklearn.compose im...
32,112
https://github.com/scikit-learn/scikit-learn/issues/32112
[ "API", "RFC", "module:compose", "module:pipeline" ]
RFC Deprecate FeatureUnion and make_union Unless I'm missing something, to me `FeatureUnion` is just a `ColumnTransformer` where all transformers are applied to all features. So it's just a special case of `ColumnTransformer`. ```py import pandas as pd from sklearn.pipeline import FeatureUnion from sklearn.compose im...
32,112
https://github.com/scikit-learn/scikit-learn/issues/32112
[ "API", "RFC", "module:compose", "module:pipeline" ]
RFC Deprecate FeatureUnion and make_union Unless I'm missing something, to me `FeatureUnion` is just a `ColumnTransformer` where all transformers are applied to all features. So it's just a special case of `ColumnTransformer`. ```py import pandas as pd from sklearn.pipeline import FeatureUnion from sklearn.compose im...
32,112
https://github.com/scikit-learn/scikit-learn/issues/32112
[ "API", "RFC", "module:compose", "module:pipeline" ]
RFC Deprecate FeatureUnion and make_union Unless I'm missing something, to me `FeatureUnion` is just a `ColumnTransformer` where all transformers are applied to all features. So it's just a special case of `ColumnTransformer`. ```py import pandas as pd from sklearn.pipeline import FeatureUnion from sklearn.compose im...
32,112
https://github.com/scikit-learn/scikit-learn/issues/32112
[ "API", "RFC", "module:compose", "module:pipeline" ]
RFC Deprecate FeatureUnion and make_union Unless I'm missing something, to me `FeatureUnion` is just a `ColumnTransformer` where all transformers are applied to all features. So it's just a special case of `ColumnTransformer`. ```py import pandas as pd from sklearn.pipeline import FeatureUnion from sklearn.compose im...
32,112
https://github.com/scikit-learn/scikit-learn/issues/32112
[ "API", "RFC", "module:compose", "module:pipeline" ]
RFC Deprecate FeatureUnion and make_union Unless I'm missing something, to me `FeatureUnion` is just a `ColumnTransformer` where all transformers are applied to all features. So it's just a special case of `ColumnTransformer`. ```py import pandas as pd from sklearn.pipeline import FeatureUnion from sklearn.compose im...
32,112
https://github.com/scikit-learn/scikit-learn/issues/32112
[ "API", "RFC", "module:compose", "module:pipeline" ]
RFC Deprecate FeatureUnion and make_union Unless I'm missing something, to me `FeatureUnion` is just a `ColumnTransformer` where all transformers are applied to all features. So it's just a special case of `ColumnTransformer`. ```py import pandas as pd from sklearn.pipeline import FeatureUnion from sklearn.compose im...
32,112
https://github.com/scikit-learn/scikit-learn/issues/32112
[ "API", "RFC", "module:compose", "module:pipeline" ]
RFC Deprecate FeatureUnion and make_union Unless I'm missing something, to me `FeatureUnion` is just a `ColumnTransformer` where all transformers are applied to all features. So it's just a special case of `ColumnTransformer`. ```py import pandas as pd from sklearn.pipeline import FeatureUnion from sklearn.compose im...
32,112
https://github.com/scikit-learn/scikit-learn/issues/32112
[ "API", "RFC", "module:compose", "module:pipeline" ]
RFC Deprecate FeatureUnion and make_union Unless I'm missing something, to me `FeatureUnion` is just a `ColumnTransformer` where all transformers are applied to all features. So it's just a special case of `ColumnTransformer`. ```py import pandas as pd from sklearn.pipeline import FeatureUnion from sklearn.compose im...
32,112
https://github.com/scikit-learn/scikit-learn/issues/32112
[ "API", "RFC", "module:compose", "module:pipeline" ]
RFC Deprecate FeatureUnion and make_union Unless I'm missing something, to me `FeatureUnion` is just a `ColumnTransformer` where all transformers are applied to all features. So it's just a special case of `ColumnTransformer`. ```py import pandas as pd from sklearn.pipeline import FeatureUnion from sklearn.compose im...
32,112
https://github.com/scikit-learn/scikit-learn/issues/32110
[ "Performance", "Needs Benchmarks", "module:neural_network" ]
Optimize Performance of SGDOptimizer and AdamOptimizer with Vectorized Operations ### Describe the workflow you want to enable I aim to enable a more efficient training workflow for Multilayer Perceptrons (MLPs) in scikit-learn by optimizing the performance of the `SGDOptimizer` and `AdamOptimizer` classes. Currently...
32,110
https://github.com/scikit-learn/scikit-learn/issues/32110
[ "Performance", "Needs Benchmarks", "module:neural_network" ]
Optimize Performance of SGDOptimizer and AdamOptimizer with Vectorized Operations ### Describe the workflow you want to enable I aim to enable a more efficient training workflow for Multilayer Perceptrons (MLPs) in scikit-learn by optimizing the performance of the `SGDOptimizer` and `AdamOptimizer` classes. Currently...
32,110
https://github.com/scikit-learn/scikit-learn/issues/32110
[ "Performance", "Needs Benchmarks", "module:neural_network" ]
Optimize Performance of SGDOptimizer and AdamOptimizer with Vectorized Operations ### Describe the workflow you want to enable I aim to enable a more efficient training workflow for Multilayer Perceptrons (MLPs) in scikit-learn by optimizing the performance of the `SGDOptimizer` and `AdamOptimizer` classes. Currently...
32,110
https://github.com/scikit-learn/scikit-learn/issues/32110
[ "Performance", "Needs Benchmarks", "module:neural_network" ]
Optimize Performance of SGDOptimizer and AdamOptimizer with Vectorized Operations ### Describe the workflow you want to enable I aim to enable a more efficient training workflow for Multilayer Perceptrons (MLPs) in scikit-learn by optimizing the performance of the `SGDOptimizer` and `AdamOptimizer` classes. Currently...
32,110
https://github.com/scikit-learn/scikit-learn/issues/32110
[ "Performance", "Needs Benchmarks", "module:neural_network" ]
Optimize Performance of SGDOptimizer and AdamOptimizer with Vectorized Operations ### Describe the workflow you want to enable I aim to enable a more efficient training workflow for Multilayer Perceptrons (MLPs) in scikit-learn by optimizing the performance of the `SGDOptimizer` and `AdamOptimizer` classes. Currently...
32,110
https://github.com/scikit-learn/scikit-learn/issues/32110
[ "Performance", "Needs Benchmarks", "module:neural_network" ]
Optimize Performance of SGDOptimizer and AdamOptimizer with Vectorized Operations ### Describe the workflow you want to enable I aim to enable a more efficient training workflow for Multilayer Perceptrons (MLPs) in scikit-learn by optimizing the performance of the `SGDOptimizer` and `AdamOptimizer` classes. Currently...
32,110
https://github.com/scikit-learn/scikit-learn/issues/32110
[ "Performance", "Needs Benchmarks", "module:neural_network" ]
Optimize Performance of SGDOptimizer and AdamOptimizer with Vectorized Operations ### Describe the workflow you want to enable I aim to enable a more efficient training workflow for Multilayer Perceptrons (MLPs) in scikit-learn by optimizing the performance of the `SGDOptimizer` and `AdamOptimizer` classes. Currently...
32,110
https://github.com/scikit-learn/scikit-learn/issues/32110
[ "Performance", "Needs Benchmarks", "module:neural_network" ]
Optimize Performance of SGDOptimizer and AdamOptimizer with Vectorized Operations ### Describe the workflow you want to enable I aim to enable a more efficient training workflow for Multilayer Perceptrons (MLPs) in scikit-learn by optimizing the performance of the `SGDOptimizer` and `AdamOptimizer` classes. Currently...
32,110
https://github.com/scikit-learn/scikit-learn/issues/32110
[ "Performance", "Needs Benchmarks", "module:neural_network" ]
Optimize Performance of SGDOptimizer and AdamOptimizer with Vectorized Operations ### Describe the workflow you want to enable I aim to enable a more efficient training workflow for Multilayer Perceptrons (MLPs) in scikit-learn by optimizing the performance of the `SGDOptimizer` and `AdamOptimizer` classes. Currently...
32,110
https://github.com/scikit-learn/scikit-learn/issues/32110
[ "Performance", "Needs Benchmarks", "module:neural_network" ]
Optimize Performance of SGDOptimizer and AdamOptimizer with Vectorized Operations ### Describe the workflow you want to enable I aim to enable a more efficient training workflow for Multilayer Perceptrons (MLPs) in scikit-learn by optimizing the performance of the `SGDOptimizer` and `AdamOptimizer` classes. Currently...
32,110
https://github.com/scikit-learn/scikit-learn/issues/32110
[ "Performance", "Needs Benchmarks", "module:neural_network" ]
Optimize Performance of SGDOptimizer and AdamOptimizer with Vectorized Operations ### Describe the workflow you want to enable I aim to enable a more efficient training workflow for Multilayer Perceptrons (MLPs) in scikit-learn by optimizing the performance of the `SGDOptimizer` and `AdamOptimizer` classes. Currently...
32,110
https://github.com/scikit-learn/scikit-learn/issues/32110
[ "Performance", "Needs Benchmarks", "module:neural_network" ]
Optimize Performance of SGDOptimizer and AdamOptimizer with Vectorized Operations ### Describe the workflow you want to enable I aim to enable a more efficient training workflow for Multilayer Perceptrons (MLPs) in scikit-learn by optimizing the performance of the `SGDOptimizer` and `AdamOptimizer` classes. Currently...
32,110
https://github.com/scikit-learn/scikit-learn/issues/32109
[ "Enhancement", "API", "Needs Decision", "module:covariance", "module:linear_model" ]
Add inner max_iter or a smart automatic setting to Lasso inside graphical lasso `GraphicalLasso` and `GraphicalLassoCV` expose `enet_tol`. They should also expose `enet_max_iter`. Currently, the `max_iter` of the *outer iteration* is also used for this inner iteration. This is unfortunate, e.g., if you set a small num...
32,109
https://github.com/scikit-learn/scikit-learn/issues/32109
[ "Enhancement", "API", "Needs Decision", "module:covariance", "module:linear_model" ]
Add inner max_iter or a smart automatic setting to Lasso inside graphical lasso `GraphicalLasso` and `GraphicalLassoCV` expose `enet_tol`. They should also expose `enet_max_iter`. Currently, the `max_iter` of the *outer iteration* is also used for this inner iteration. This is unfortunate, e.g., if you set a small num...
32,109
https://github.com/scikit-learn/scikit-learn/issues/32109
[ "Enhancement", "API", "Needs Decision", "module:covariance", "module:linear_model" ]
Add inner max_iter or a smart automatic setting to Lasso inside graphical lasso `GraphicalLasso` and `GraphicalLassoCV` expose `enet_tol`. They should also expose `enet_max_iter`. Currently, the `max_iter` of the *outer iteration* is also used for this inner iteration. This is unfortunate, e.g., if you set a small num...
32,109
https://github.com/scikit-learn/scikit-learn/issues/32104
[ "Bug" ]
FeatureUnion with polars output can error due to duplicate column names ### Describe the bug FeatureUnion concatenates outputs of its transformers _before_ the `set_output` wrapper renames columns based on `get_feature_names_out` (adding the transformer name prefix). This works with pandas but not polars which does n...
32,104
https://github.com/scikit-learn/scikit-learn/issues/32104
[ "Bug" ]
FeatureUnion with polars output can error due to duplicate column names ### Describe the bug FeatureUnion concatenates outputs of its transformers _before_ the `set_output` wrapper renames columns based on `get_feature_names_out` (adding the transformer name prefix). This works with pandas but not polars which does n...
32,104
https://github.com/scikit-learn/scikit-learn/issues/32104
[ "Bug" ]
FeatureUnion with polars output can error due to duplicate column names ### Describe the bug FeatureUnion concatenates outputs of its transformers _before_ the `set_output` wrapper renames columns based on `get_feature_names_out` (adding the transformer name prefix). This works with pandas but not polars which does n...
32,104
https://github.com/scikit-learn/scikit-learn/issues/32104
[ "Bug" ]
FeatureUnion with polars output can error due to duplicate column names ### Describe the bug FeatureUnion concatenates outputs of its transformers _before_ the `set_output` wrapper renames columns based on `get_feature_names_out` (adding the transformer name prefix). This works with pandas but not polars which does n...
32,104
https://github.com/scikit-learn/scikit-learn/issues/32104
[ "Bug" ]
FeatureUnion with polars output can error due to duplicate column names ### Describe the bug FeatureUnion concatenates outputs of its transformers _before_ the `set_output` wrapper renames columns based on `get_feature_names_out` (adding the transformer name prefix). This works with pandas but not polars which does n...
32,104
https://github.com/scikit-learn/scikit-learn/issues/32104
[ "Bug" ]
FeatureUnion with polars output can error due to duplicate column names ### Describe the bug FeatureUnion concatenates outputs of its transformers _before_ the `set_output` wrapper renames columns based on `get_feature_names_out` (adding the transformer name prefix). This works with pandas but not polars which does n...
32,104
https://github.com/scikit-learn/scikit-learn/issues/32099
[ "Bug" ]
DecisionTreeRegressor with absolute error criterion: non-optimal split ### Describe the bug While working on fixing the issue https://github.com/scikit-learn/scikit-learn/issues/9626, I noticed that in some cases, the current implementation of `DecisionTreeRegressor(criterion="absolute_error")` doesn't not find the o...
32,099
https://github.com/scikit-learn/scikit-learn/issues/32099
[ "Bug" ]
DecisionTreeRegressor with absolute error criterion: non-optimal split ### Describe the bug While working on fixing the issue https://github.com/scikit-learn/scikit-learn/issues/9626, I noticed that in some cases, the current implementation of `DecisionTreeRegressor(criterion="absolute_error")` doesn't not find the o...
32,099
https://github.com/scikit-learn/scikit-learn/issues/32099
[ "Bug" ]
DecisionTreeRegressor with absolute error criterion: non-optimal split ### Describe the bug While working on fixing the issue https://github.com/scikit-learn/scikit-learn/issues/9626, I noticed that in some cases, the current implementation of `DecisionTreeRegressor(criterion="absolute_error")` doesn't not find the o...
32,099
https://github.com/scikit-learn/scikit-learn/issues/32099
[ "Bug" ]
DecisionTreeRegressor with absolute error criterion: non-optimal split ### Describe the bug While working on fixing the issue https://github.com/scikit-learn/scikit-learn/issues/9626, I noticed that in some cases, the current implementation of `DecisionTreeRegressor(criterion="absolute_error")` doesn't not find the o...
32,099
https://github.com/scikit-learn/scikit-learn/issues/32099
[ "Bug" ]
DecisionTreeRegressor with absolute error criterion: non-optimal split ### Describe the bug While working on fixing the issue https://github.com/scikit-learn/scikit-learn/issues/9626, I noticed that in some cases, the current implementation of `DecisionTreeRegressor(criterion="absolute_error")` doesn't not find the o...
32,099
https://github.com/scikit-learn/scikit-learn/issues/32099
[ "Bug" ]
DecisionTreeRegressor with absolute error criterion: non-optimal split ### Describe the bug While working on fixing the issue https://github.com/scikit-learn/scikit-learn/issues/9626, I noticed that in some cases, the current implementation of `DecisionTreeRegressor(criterion="absolute_error")` doesn't not find the o...
32,099
https://github.com/scikit-learn/scikit-learn/issues/32095
[ "Bug" ]
Using `fetch_20newsgroups` with multiple pytest workers leads to race ### Describe the bug When using `pytest-xdist` with several workers to run a test suite that uses `fetch_20newsgroups` as a fixture (`scope="session"`) the dataset shape is sometimes wrong. For example I just had a run where `X.shape=(5902, 68435) ...
32,095
https://github.com/scikit-learn/scikit-learn/issues/32095
[ "Bug" ]
Using `fetch_20newsgroups` with multiple pytest workers leads to race ### Describe the bug When using `pytest-xdist` with several workers to run a test suite that uses `fetch_20newsgroups` as a fixture (`scope="session"`) the dataset shape is sometimes wrong. For example I just had a run where `X.shape=(5902, 68435) ...
32,095
https://github.com/scikit-learn/scikit-learn/issues/32095
[ "Bug" ]
Using `fetch_20newsgroups` with multiple pytest workers leads to race ### Describe the bug When using `pytest-xdist` with several workers to run a test suite that uses `fetch_20newsgroups` as a fixture (`scope="session"`) the dataset shape is sometimes wrong. For example I just had a run where `X.shape=(5902, 68435) ...
32,095
https://github.com/scikit-learn/scikit-learn/issues/32090
[ "Bug", "Documentation" ]
Unpickling ColumnTransformer fitted in 1.6.1 fails in 1.7.1 with AttributeError: _RemainderColsList ### Describe the bug **Summary** A `ColumnTransformer` pickled with **scikit-learn 1.6.1** cannot be unpickled with **1.7.1** (and other versions > 1.6.1). The unpickling fails before any method call with: ```bash A...
32,090
https://github.com/scikit-learn/scikit-learn/issues/32090
[ "Bug", "Documentation" ]
Unpickling ColumnTransformer fitted in 1.6.1 fails in 1.7.1 with AttributeError: _RemainderColsList ### Describe the bug **Summary** A `ColumnTransformer` pickled with **scikit-learn 1.6.1** cannot be unpickled with **1.7.1** (and other versions > 1.6.1). The unpickling fails before any method call with: ```bash A...
32,090
https://github.com/scikit-learn/scikit-learn/issues/32090
[ "Bug", "Documentation" ]
Unpickling ColumnTransformer fitted in 1.6.1 fails in 1.7.1 with AttributeError: _RemainderColsList ### Describe the bug **Summary** A `ColumnTransformer` pickled with **scikit-learn 1.6.1** cannot be unpickled with **1.7.1** (and other versions > 1.6.1). The unpickling fails before any method call with: ```bash A...
32,090
https://github.com/scikit-learn/scikit-learn/issues/32090
[ "Bug", "Documentation" ]
Unpickling ColumnTransformer fitted in 1.6.1 fails in 1.7.1 with AttributeError: _RemainderColsList ### Describe the bug **Summary** A `ColumnTransformer` pickled with **scikit-learn 1.6.1** cannot be unpickled with **1.7.1** (and other versions > 1.6.1). The unpickling fails before any method call with: ```bash A...
32,090
https://github.com/scikit-learn/scikit-learn/issues/32087
[ "Bug" ]
⚠️ CI failed on Linux_free_threaded.pylatest_free_threaded (last failure: Sep 27, 2025) ⚠️ **CI is still failing on [Linux_free_threaded.pylatest_free_threaded](https://dev.azure.com/scikit-learn/scikit-learn/_build/results?buildId=80471&view=logs&j=c10228e9-6cf7-5c29-593f-d74f893ca1bd)** (Sep 27, 2025) - test_get_met...
32,087
https://github.com/scikit-learn/scikit-learn/issues/32087
[ "Bug" ]
⚠️ CI failed on Linux_free_threaded.pylatest_free_threaded (last failure: Sep 27, 2025) ⚠️ **CI is still failing on [Linux_free_threaded.pylatest_free_threaded](https://dev.azure.com/scikit-learn/scikit-learn/_build/results?buildId=80471&view=logs&j=c10228e9-6cf7-5c29-593f-d74f893ca1bd)** (Sep 27, 2025) - test_get_met...
32,087
https://github.com/scikit-learn/scikit-learn/issues/32087
[ "Bug" ]
⚠️ CI failed on Linux_free_threaded.pylatest_free_threaded (last failure: Sep 27, 2025) ⚠️ **CI is still failing on [Linux_free_threaded.pylatest_free_threaded](https://dev.azure.com/scikit-learn/scikit-learn/_build/results?buildId=80471&view=logs&j=c10228e9-6cf7-5c29-593f-d74f893ca1bd)** (Sep 27, 2025) - test_get_met...
32,087
https://github.com/scikit-learn/scikit-learn/issues/32087
[ "Bug" ]
⚠️ CI failed on Linux_free_threaded.pylatest_free_threaded (last failure: Sep 27, 2025) ⚠️ **CI is still failing on [Linux_free_threaded.pylatest_free_threaded](https://dev.azure.com/scikit-learn/scikit-learn/_build/results?buildId=80471&view=logs&j=c10228e9-6cf7-5c29-593f-d74f893ca1bd)** (Sep 27, 2025) - test_get_met...
32,087
https://github.com/scikit-learn/scikit-learn/issues/32086
[ "Needs Triage" ]
⚠️ CI failed on Linux_Runs.pylatest_conda_forge_mkl (last failure: Sep 03, 2025) ⚠️ **CI failed on [Linux_Runs.pylatest_conda_forge_mkl](https://dev.azure.com/scikit-learn/scikit-learn/_build/results?buildId=79590&view=logs&j=dde5042c-7464-5d47-9507-31bdd2ee0a3a)** (Sep 03, 2025) - Test Collection Failure COMMENT: ##...
32,086
https://github.com/scikit-learn/scikit-learn/issues/32083
[ "Documentation" ]
1.1.8 LARS Lasso at Mathematical Formulation ### Describe the issue linked to the documentation Instead of giving a vector result, the LARS solution consists of a curve denoting the solution for each value of the l1 norm of the parameter vector. * not a curve * "curve" is not computed at every point * infinitely man...
32,083
https://github.com/scikit-learn/scikit-learn/issues/32083
[ "Documentation" ]
1.1.8 LARS Lasso at Mathematical Formulation ### Describe the issue linked to the documentation Instead of giving a vector result, the LARS solution consists of a curve denoting the solution for each value of the l1 norm of the parameter vector. * not a curve * "curve" is not computed at every point * infinitely man...
32,083
https://github.com/scikit-learn/scikit-learn/issues/32083
[ "Documentation" ]
1.1.8 LARS Lasso at Mathematical Formulation ### Describe the issue linked to the documentation Instead of giving a vector result, the LARS solution consists of a curve denoting the solution for each value of the l1 norm of the parameter vector. * not a curve * "curve" is not computed at every point * infinitely man...
32,083
https://github.com/scikit-learn/scikit-learn/issues/32083
[ "Documentation" ]
1.1.8 LARS Lasso at Mathematical Formulation ### Describe the issue linked to the documentation Instead of giving a vector result, the LARS solution consists of a curve denoting the solution for each value of the l1 norm of the parameter vector. * not a curve * "curve" is not computed at every point * infinitely man...
32,083
https://github.com/scikit-learn/scikit-learn/issues/32083
[ "Documentation" ]
1.1.8 LARS Lasso at Mathematical Formulation ### Describe the issue linked to the documentation Instead of giving a vector result, the LARS solution consists of a curve denoting the solution for each value of the l1 norm of the parameter vector. * not a curve * "curve" is not computed at every point * infinitely man...
32,083
https://github.com/scikit-learn/scikit-learn/issues/32083
[ "Documentation" ]
1.1.8 LARS Lasso at Mathematical Formulation ### Describe the issue linked to the documentation Instead of giving a vector result, the LARS solution consists of a curve denoting the solution for each value of the l1 norm of the parameter vector. * not a curve * "curve" is not computed at every point * infinitely man...
32,083
https://github.com/scikit-learn/scikit-learn/issues/32076
[ "Enhancement", "help wanted" ]
```TargetEncoder``` should take ```groups``` as an argument ### Describe the workflow you want to enable The current implementation of TargetEncoder uses ```KFold```-cross-validation to avoid data leakage. In cases of longitudinal or clustered data, it is desirable to ensure that rows belonging to the same group or c...
32,076
https://github.com/scikit-learn/scikit-learn/issues/32076
[ "Enhancement", "help wanted" ]
```TargetEncoder``` should take ```groups``` as an argument ### Describe the workflow you want to enable The current implementation of TargetEncoder uses ```KFold```-cross-validation to avoid data leakage. In cases of longitudinal or clustered data, it is desirable to ensure that rows belonging to the same group or c...
32,076
https://github.com/scikit-learn/scikit-learn/issues/32076
[ "Enhancement", "help wanted" ]
```TargetEncoder``` should take ```groups``` as an argument ### Describe the workflow you want to enable The current implementation of TargetEncoder uses ```KFold```-cross-validation to avoid data leakage. In cases of longitudinal or clustered data, it is desirable to ensure that rows belonging to the same group or c...
32,076
https://github.com/scikit-learn/scikit-learn/issues/32076
[ "Enhancement", "help wanted" ]
```TargetEncoder``` should take ```groups``` as an argument ### Describe the workflow you want to enable The current implementation of TargetEncoder uses ```KFold```-cross-validation to avoid data leakage. In cases of longitudinal or clustered data, it is desirable to ensure that rows belonging to the same group or c...
32,076
https://github.com/scikit-learn/scikit-learn/issues/32076
[ "Enhancement", "help wanted" ]
```TargetEncoder``` should take ```groups``` as an argument ### Describe the workflow you want to enable The current implementation of TargetEncoder uses ```KFold```-cross-validation to avoid data leakage. In cases of longitudinal or clustered data, it is desirable to ensure that rows belonging to the same group or c...
32,076
https://github.com/scikit-learn/scikit-learn/issues/32076
[ "Enhancement", "help wanted" ]
```TargetEncoder``` should take ```groups``` as an argument ### Describe the workflow you want to enable The current implementation of TargetEncoder uses ```KFold```-cross-validation to avoid data leakage. In cases of longitudinal or clustered data, it is desirable to ensure that rows belonging to the same group or c...
32,076
https://github.com/scikit-learn/scikit-learn/issues/32076
[ "Enhancement", "help wanted" ]
```TargetEncoder``` should take ```groups``` as an argument ### Describe the workflow you want to enable The current implementation of TargetEncoder uses ```KFold```-cross-validation to avoid data leakage. In cases of longitudinal or clustered data, it is desirable to ensure that rows belonging to the same group or c...
32,076
https://github.com/scikit-learn/scikit-learn/issues/32076
[ "Enhancement", "help wanted" ]
```TargetEncoder``` should take ```groups``` as an argument ### Describe the workflow you want to enable The current implementation of TargetEncoder uses ```KFold```-cross-validation to avoid data leakage. In cases of longitudinal or clustered data, it is desirable to ensure that rows belonging to the same group or c...
32,076
https://github.com/scikit-learn/scikit-learn/issues/32076
[ "Enhancement", "help wanted" ]
```TargetEncoder``` should take ```groups``` as an argument ### Describe the workflow you want to enable The current implementation of TargetEncoder uses ```KFold```-cross-validation to avoid data leakage. In cases of longitudinal or clustered data, it is desirable to ensure that rows belonging to the same group or c...
32,076
https://github.com/scikit-learn/scikit-learn/issues/32076
[ "Enhancement", "help wanted" ]
```TargetEncoder``` should take ```groups``` as an argument ### Describe the workflow you want to enable The current implementation of TargetEncoder uses ```KFold```-cross-validation to avoid data leakage. In cases of longitudinal or clustered data, it is desirable to ensure that rows belonging to the same group or c...
32,076
https://github.com/scikit-learn/scikit-learn/issues/32076
[ "Enhancement", "help wanted" ]
```TargetEncoder``` should take ```groups``` as an argument ### Describe the workflow you want to enable The current implementation of TargetEncoder uses ```KFold```-cross-validation to avoid data leakage. In cases of longitudinal or clustered data, it is desirable to ensure that rows belonging to the same group or c...
32,076
https://github.com/scikit-learn/scikit-learn/issues/32076
[ "Enhancement", "help wanted" ]
```TargetEncoder``` should take ```groups``` as an argument ### Describe the workflow you want to enable The current implementation of TargetEncoder uses ```KFold```-cross-validation to avoid data leakage. In cases of longitudinal or clustered data, it is desirable to ensure that rows belonging to the same group or c...
32,076
https://github.com/scikit-learn/scikit-learn/issues/32075
[ "RFC" ]
RFC new fitted attributes for LogisticRegressionCV Contributes to #11865. ### Fitted Attributes After the removal of `multi_class` and any OvR-logic in `LogisticRegressionCV` in #32073, there are a few fitted attributes that have now (or always had) a strange data format (I neglect l1_ratios in the following for ease...
32,075
https://github.com/scikit-learn/scikit-learn/issues/32075
[ "RFC" ]
RFC new fitted attributes for LogisticRegressionCV Contributes to #11865. ### Fitted Attributes After the removal of `multi_class` and any OvR-logic in `LogisticRegressionCV` in #32073, there are a few fitted attributes that have now (or always had) a strange data format (I neglect l1_ratios in the following for ease...
32,075
https://github.com/scikit-learn/scikit-learn/issues/32072
[ "Bug", "Needs Triage" ]
LogisticRegressionCV intercept is wrong ### Describe the bug The intercept calculated by `LogisticRegressionCV` is wrong. A bit related to #11865. ### Steps/Code to Reproduce ```python import numpy as np from sklearn.datasets import load_iris from sklearn.linear_model import LogisticRegression, LogisticRegressionCV...
32,072
https://github.com/scikit-learn/scikit-learn/issues/32067
[ "New Feature", "Needs Triage" ]
Enhance the warning message for metadata default value change ### Describe the workflow you want to enable Currently the warning raised for [Deprecation / Default Value Change](https://scikit-learn.org/stable/auto_examples/miscellaneous/plot_metadata_routing.html#deprecation-default-value-change) is quite generic ```...
32,067
https://github.com/scikit-learn/scikit-learn/issues/32062
[ "Bug", "Needs Investigation" ]
Regressor Prediction Makes a Negative Y Offset ### Describe the bug Hi, I've found a strange situation where regressor prediction makes a negative Y offset. See an orange line on my picture below. Here is my py file and json data: [test_scikit.zip](https://github.com/user-attachments/files/22069020/test_scikit.zip) ...
32,062
https://github.com/scikit-learn/scikit-learn/issues/32062
[ "Bug", "Needs Investigation" ]
Regressor Prediction Makes a Negative Y Offset ### Describe the bug Hi, I've found a strange situation where regressor prediction makes a negative Y offset. See an orange line on my picture below. Here is my py file and json data: [test_scikit.zip](https://github.com/user-attachments/files/22069020/test_scikit.zip) ...
32,062
https://github.com/scikit-learn/scikit-learn/issues/32062
[ "Bug", "Needs Investigation" ]
Regressor Prediction Makes a Negative Y Offset ### Describe the bug Hi, I've found a strange situation where regressor prediction makes a negative Y offset. See an orange line on my picture below. Here is my py file and json data: [test_scikit.zip](https://github.com/user-attachments/files/22069020/test_scikit.zip) ...
32,062
https://github.com/scikit-learn/scikit-learn/issues/32062
[ "Bug", "Needs Investigation" ]
Regressor Prediction Makes a Negative Y Offset ### Describe the bug Hi, I've found a strange situation where regressor prediction makes a negative Y offset. See an orange line on my picture below. Here is my py file and json data: [test_scikit.zip](https://github.com/user-attachments/files/22069020/test_scikit.zip) ...
32,062
https://github.com/scikit-learn/scikit-learn/issues/32062
[ "Bug", "Needs Investigation" ]
Regressor Prediction Makes a Negative Y Offset ### Describe the bug Hi, I've found a strange situation where regressor prediction makes a negative Y offset. See an orange line on my picture below. Here is my py file and json data: [test_scikit.zip](https://github.com/user-attachments/files/22069020/test_scikit.zip) ...
32,062
https://github.com/scikit-learn/scikit-learn/issues/32062
[ "Bug", "Needs Investigation" ]
Regressor Prediction Makes a Negative Y Offset ### Describe the bug Hi, I've found a strange situation where regressor prediction makes a negative Y offset. See an orange line on my picture below. Here is my py file and json data: [test_scikit.zip](https://github.com/user-attachments/files/22069020/test_scikit.zip) ...
32,062
https://github.com/scikit-learn/scikit-learn/issues/32062
[ "Bug", "Needs Investigation" ]
Regressor Prediction Makes a Negative Y Offset ### Describe the bug Hi, I've found a strange situation where regressor prediction makes a negative Y offset. See an orange line on my picture below. Here is my py file and json data: [test_scikit.zip](https://github.com/user-attachments/files/22069020/test_scikit.zip) ...
32,062
https://github.com/scikit-learn/scikit-learn/issues/32062
[ "Bug", "Needs Investigation" ]
Regressor Prediction Makes a Negative Y Offset ### Describe the bug Hi, I've found a strange situation where regressor prediction makes a negative Y offset. See an orange line on my picture below. Here is my py file and json data: [test_scikit.zip](https://github.com/user-attachments/files/22069020/test_scikit.zip) ...
32,062
https://github.com/scikit-learn/scikit-learn/issues/32062
[ "Bug", "Needs Investigation" ]
Regressor Prediction Makes a Negative Y Offset ### Describe the bug Hi, I've found a strange situation where regressor prediction makes a negative Y offset. See an orange line on my picture below. Here is my py file and json data: [test_scikit.zip](https://github.com/user-attachments/files/22069020/test_scikit.zip) ...
32,062
https://github.com/scikit-learn/scikit-learn/issues/32062
[ "Bug", "Needs Investigation" ]
Regressor Prediction Makes a Negative Y Offset ### Describe the bug Hi, I've found a strange situation where regressor prediction makes a negative Y offset. See an orange line on my picture below. Here is my py file and json data: [test_scikit.zip](https://github.com/user-attachments/files/22069020/test_scikit.zip) ...
32,062
https://github.com/scikit-learn/scikit-learn/issues/32062
[ "Bug", "Needs Investigation" ]
Regressor Prediction Makes a Negative Y Offset ### Describe the bug Hi, I've found a strange situation where regressor prediction makes a negative Y offset. See an orange line on my picture below. Here is my py file and json data: [test_scikit.zip](https://github.com/user-attachments/files/22069020/test_scikit.zip) ...
32,062
https://github.com/scikit-learn/scikit-learn/issues/32049
[ "Documentation", "module:metrics" ]
The dcg_score and ndcg_score documentation are hard to understand ### Describe the issue linked to the documentation The documentation for the `dcg_score` and `ndcg_score` leave much to be desired. I believe this is also a by-product of competing definitions of the discount cumulative gains (DCG) and normalised DCG ...
32,049
https://github.com/scikit-learn/scikit-learn/issues/32048
[ "New Feature", "Needs Decision - Include Feature" ]
Leiden Clustering ### Describe the workflow you want to enable The "Leiden" Clustering algorithm is considered one of the most powerful clustering algorithms, often outperforming competitors by a wide margin. The algorithm fulfils the inclusion criteria: its now 6 years old, has some 5200 citations. Currently, it ...
32,048
https://github.com/scikit-learn/scikit-learn/issues/32048
[ "New Feature", "Needs Decision - Include Feature" ]
Leiden Clustering ### Describe the workflow you want to enable The "Leiden" Clustering algorithm is considered one of the most powerful clustering algorithms, often outperforming competitors by a wide margin. The algorithm fulfils the inclusion criteria: its now 6 years old, has some 5200 citations. Currently, it ...
32,048
https://github.com/scikit-learn/scikit-learn/issues/32048
[ "New Feature", "Needs Decision - Include Feature" ]
Leiden Clustering ### Describe the workflow you want to enable The "Leiden" Clustering algorithm is considered one of the most powerful clustering algorithms, often outperforming competitors by a wide margin. The algorithm fulfils the inclusion criteria: its now 6 years old, has some 5200 citations. Currently, it ...
32,048
https://github.com/scikit-learn/scikit-learn/issues/32048
[ "New Feature", "Needs Decision - Include Feature" ]
Leiden Clustering ### Describe the workflow you want to enable The "Leiden" Clustering algorithm is considered one of the most powerful clustering algorithms, often outperforming competitors by a wide margin. The algorithm fulfils the inclusion criteria: its now 6 years old, has some 5200 citations. Currently, it ...
32,048