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https://api.github.com/repos/scikit-learn/scikit-learn/issues/33360 | https://api.github.com/repos/scikit-learn/scikit-learn | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33360/labels{/name} | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33360/comments | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33360/events | https://github.com/scikit-learn/scikit-learn/pull/33360 | 3,974,787,957 | PR_kwDOAAzd1s7FeipG | 33,360 | DOC Add explicit math formulas to dcg_score and ndcg_score | {
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Adds explicit LaTeX formulas to the docstrings of `dcg_score` and `ndcg_score` so users can immediately identify which definition of DCG this implementation uses.
### Problem
As reported in #32049, the prose description *"Sum the true scores ranked in the order induced by the predicted score... | null | {
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Fixes #32848
- `nan_euclidean_distances(X)` could return an asymmetric distance matrix when `X` contains missing values, due to floating point rounding in intermediate dot products and subtractions.
- Fix enforces exact symmetry via `(D + D.T) / 2` when computing pairwise distances of a single array (`X is... | {
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Fixes #32585
- `QuantileTransformer(ignore_implicit_zeros=True)` subsampling was incorrectly computing the number of non-zero samples to keep as `subsample * nnz // n_samples`. For very sparse matrices (where `n_samples` vastly exceeds `nnz`), this evaluated to 0, producing empty arrays and all-zero quanti... | {
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"number": 6... | 1 | 2026-02-22T14:17:22 | 2026-02-24T10:22:59 | 2026-02-24T10:22:59 | null | MEMBER | null | null | null | null | When we made `confusion_matrix_at_thresholds` public (previously named `_binary_clf_curve`) we forgot to make optional args kwarg only. Since it's already released in 1.8 we need to do that with deprecation.
ping @lucyleeow | {
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🙌 Thanks for contributing a pull request!
👀 Please ensure you have taken a look at the contribution guidelines:
https://github.com/scikit-learn/scikit-learn/blob/main/CONTRIBUTING.md
✅ In particular following the pull request checklist will increase the likelihood
of having maintainers review your PR:
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Hi I was running an automated test and ran into this issue.
Checked the changelog for Numpy as saw as of v2.4.0 that conversion of an array with ndim > 0 to a scalar is deprecated. The error below looks like this is linked to that deprecation.
```
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Supersedes #12866 #4899 and #7068 , https://github.com/scikit-learn/scikit-learn/pull/3346
Supersedes https://github.com/scikit-learn/scikit-learn/pull/29437 because the diff was too complicated relative to main.
Took some inspiration from: https://github.com/cakedev0/scikit-learn/pull/... | null | {
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This PR fixes a performance issue in the spectral embedding function where was targeting the wrong eigenvalues, causing suboptimal convergence.
## Problem
The existing code computes (negative Laplacian) but the comments describe using (identity minus Laplacian) and targeting eigenvalues near 1.0 with .... | {
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thank you for keeping such an essential ML toolkit alive and healthy. Many modern LLM / RAG stacks still rely on scikit-learn components for preprocessing, feature pipelines, classical models, and evaluation baselines around an LLM core.
I maintain an MIT-licensed project called **WFGY Problem M... | null | {
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## Summary
This PR fixes: Segfault in KDTree.query_radius
## Changes
```
sklearn/neighbors/tests/test_neighbors_tree.py | 25 ++++
sklearn/utils/_sorting.pyx | 165 +++++++++++++++++--------
2 files changed, 141 insertions(+), 49 deletions(-)
```
## Testing
Please review the changes... | {
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"node_id": "MDU6TGFiZWwyMz... | closed | false | [] | null | 0 | 2026-02-21T14:12:47 | 2026-02-22T07:19:54 | 2026-02-22T07:19:46 | null | NONE | null | null | null | null | Fixes #33146
## Summary
This PR fixes: Using `BisectingKMeans` with `init` raises a possibly dubious `ValueError`
## Changes
```
.../upcoming_changes/sklearn.cluster/33146.fix.rst | 4 ++++
sklearn/cluster/_bisect_k_means.py | 4 +++-
sklearn/cluster/_kmeans.py | 10 +++++----... | {
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## Summary
This PR fixes: The eigsh call in spectral embedding is done wrong and differently from what is described in the comments
## Changes
```
sklearn/manifold/_spectral_embedding.py | 28 ++++++++++------------------
1 file changed, 10 insertions(+), 18 deletions(-)
```
## Testing
Please review the... | {
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Similar to #32644.
#### What does this implement/fix? Explain your changes.
This adds array API support to `PoissonRegressor(solver="lbfgs")`.
#### AI usage disclosure
None
#### Any other comments?
~~Depends on #33345.~~(merged)
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None
#### What does this implement/fix? Explain your changes.
Small clean up to remove an unused attribute. `need_update_leaves_values` is redundant to attribute `differentiable` (if one is true, the other is false, and vice versa).
#### AI usage disclosure
None
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Contributes to #26024.
#### What does this implement/fix? Explain your changes.
This makes the link functions in the private loss module array API compliant (for recent versions of scipy).
#### AI usage disclosure
None
#### Any other comments?
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## Summary
This PR fixes: `check_X_y` with list of dtypes converts polars 'X' incorrectly
## Changes
```
sklearn/utils/validation.py | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)
```
## Testing
Please review the changes carefully. The fix was verified against the existing test s... | {
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## Summary
This PR fixes: Segmentation fault with free-threaded in `test_gpr_correct_error_message`
## Changes
```
sklearn/gaussian_process/kernels.py | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)
```
## Testing
Please review the changes carefully. The fix was verified against t... | {
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The chance_level line drawn by `PrecisionRecallDisplay.from_predictions` when `plot_chance_level=True` is not correct when `y_true` is an instance of `pytorch.Tensor`.
### Steps/Code to Reproduce
```python
# pytorch==2.8.0
from sklearn.metrics impo... | null | {
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None
#### What does this implement/fix? Explain your changes.
Minor code cleaning in private loss module.
#### AI usage disclosure
None.
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🙌 Thanks for contributing a pull request!
👀 Please ensure you have taken a look at the contribution guidelines:
https://github.com/scikit-learn/scikit-learn/blob/main/CONTRIBUTING.md
✅ In particular following the pull request checklist will increase the likelihood
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#### What does this implement/fix? Explain your changes.
->
This PR updates the docstrings for supervised clustering metrics in sklearn/metrics/cluster/_supervised.py. Previously, the parameters labels_true and labels_pred incorrectly specified dtype=integral (or int).
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It might be worth adding a test in `test_progressbar.py` that verifies that the `RichTask` tree mirrors the `CallbackContext` tree. This would guard against regressions if `RichProgressMonitor` (which builds the tree) is modified in the future.
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This allows VarianceThreshold to handle the special case of all-NaN columns. | {
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https://api.github.com/repos/scikit-learn/scikit-learn/issues/33336 | https://api.github.com/repos/scikit-learn/scikit-learn | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33336/labels{/name} | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33336/comments | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33336/events | https://github.com/scikit-learn/scikit-learn/pull/33336 | 3,967,240,563 | PR_kwDOAAzd1s7FGQOJ | 33,336 | FEA Add Array API support for sigmoid and isotonic in CalibratedClassifierCV | {
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"node_id": "LA_kwDOAAzd1s8AA... | closed | false | [] | null | 1 | 2026-02-20T08:19:26 | 2026-02-20T08:49:07 | 2026-02-20T08:48:55 | null | NONE | null | null | null | null | #### Reference Issues/PRs
Closes #31869 (partially - adds sigmoid and isotonic support)
Follows up on #32246 which added Array API support for temperature scaling.
## Summary
- Extends Array API support in `CalibratedClassifierCV` to `method="sigmoid"` (Platt scaling) and `method="isotonic"` calibration methods
- S... | {
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Fixes #12952
What does this implement/fix? Explain your changes.
This PR introduces out-of-core learning capabilities to the NearestCentroid classifier by implementing the partial_fit method for the euclidean metric. This allows the model to incrementally train on large-scale datasets that cannot fit entirely int... | {
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It would serve to showcase how callback support would look like in actual scikit-learn estimators.
Interesting candidates:
- GridSearchCV
- Pipeline
- LogisticRegression
- more ?
ping @FrancoisPgm | null | {
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Fixes #33214.
#### What does this implement/fix? Explain your changes.
This PR changes the default `scoring=None`, i.e. accuracy, to `scoring=neg_log_loss` in `LogisticRegressionCV`.
#### AI usage disclosure
None
#### Any other comments?
The failing tests will be fixed, once #32... | null | {
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https://api.github.com/repos/scikit-learn/scikit-learn/issues/33332 | https://api.github.com/repos/scikit-learn/scikit-learn | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33332/labels{/name} | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33332/comments | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33332/events | https://github.com/scikit-learn/scikit-learn/pull/33332 | 3,964,990,677 | PR_kwDOAAzd1s7E_CXD | 33,332 | docs: clarify redundant validation comment in _encoders.py | {
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https://api.github.com/repos/scikit-learn/scikit-learn/issues/33331 | https://api.github.com/repos/scikit-learn/scikit-learn | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33331/labels{/name} | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33331/comments | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33331/events | https://github.com/scikit-learn/scikit-learn/issues/33331 | 3,964,229,995 | I_kwDOAAzd1s7sSVlr | 33,331 | [Callbacks] DOC Add documentation for developpers | {
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Add a section or page in the developper guide to document
- the callback API
- the different objects needed to add callback support into an estimator
- how to implement callback support in an estimator
- how to implement a custome callback
Part of... | null | {
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https://api.github.com/repos/scikit-learn/scikit-learn/issues/33330 | https://api.github.com/repos/scikit-learn/scikit-learn | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33330/labels{/name} | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33330/comments | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33330/events | https://github.com/scikit-learn/scikit-learn/issues/33330 | 3,964,209,942 | I_kwDOAAzd1s7sSQsW | 33,330 | [Callbacks] DOC Add documentation in the user guide | {
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Add a page or section, tbd, in the user guide to document
- where are the callbacks
- how to use them
- what are the different callbacks and their purpose
- more ?
ping @FrancoisPgm | null | {
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https://api.github.com/repos/scikit-learn/scikit-learn/issues/33329 | https://api.github.com/repos/scikit-learn/scikit-learn | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33329/labels{/name} | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33329/comments | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33329/events | https://github.com/scikit-learn/scikit-learn/issues/33329 | 3,964,178,622 | I_kwDOAAzd1s7sSJC- | 33,329 | [Callbacks] FEA Add a callback for metric monitoring | {
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The goal is to record values of a given metric during ``fit``.
It can be computed on the train set or on a validation set.
ping @FrancoisPgm | null | {
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related to https://github.com/scikit-learn/scikit-learn/issues/27676
We raise a warning for an estimator not implementing callback support within a meta-estimator that has callbacks registered.
Currently this warning is repeated each ti... | null | {
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https://api.github.com/repos/scikit-learn/scikit-learn/issues/33327 | https://api.github.com/repos/scikit-learn/scikit-learn | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33327/labels{/name} | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33327/comments | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33327/events | https://github.com/scikit-learn/scikit-learn/issues/33327 | 3,964,110,383 | I_kwDOAAzd1s7sR4Yv | 33,327 | [Callbacks] ENH Allow ProgressBar to run on python queue | {
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related to https://github.com/scikit-learn/scikit-learn/issues/27676
We'll probably need something similar for other callbacks as well as it will be useful in particular for pyodide.
So we can consider implementing it using a constructo... | null | {
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https://api.github.com/repos/scikit-learn/scikit-learn/issues/33326 | https://api.github.com/repos/scikit-learn/scikit-learn | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33326/labels{/name} | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33326/comments | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33326/events | https://github.com/scikit-learn/scikit-learn/issues/33326 | 3,964,088,119 | I_kwDOAAzd1s7sRy83 | 33,326 | [Callbacks] FEA A repr for CallbackContext | {
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related to https://github.com/scikit-learn/scikit-learn/issues/27676
It could be a simple representation just showing key information about the given context.
Or a complex representation including the whole tree below this context. (may... | null | {
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https://api.github.com/repos/scikit-learn/scikit-learn/issues/33325 | https://api.github.com/repos/scikit-learn/scikit-learn | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33325/labels{/name} | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33325/comments | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33325/events | https://github.com/scikit-learn/scikit-learn/issues/33325 | 3,964,072,158 | I_kwDOAAzd1s7sRvDe | 33,325 | [Callbacks] ENH Don't create a new manager for each callback | {
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related to https://github.com/scikit-learn/scikit-learn/issues/27676
Since callbacks are expected to be process aware and in particular aggregate information accross processes, they more or less all need to hold a data structure (list, ... | null | {
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https://api.github.com/repos/scikit-learn/scikit-learn/issues/33324 | https://api.github.com/repos/scikit-learn/scikit-learn | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33324/labels{/name} | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33324/comments | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33324/events | https://github.com/scikit-learn/scikit-learn/issues/33324 | 3,964,010,668 | I_kwDOAAzd1s7sRgCs | 33,324 | [Callbacks] TST Add tests to check that all callback hooks are called in the expected order | {
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related to https://github.com/scikit-learn/scikit-learn/issues/27676
Let's add tests to check the sequence of calls of callback hooks and make sure it follows the expected order (i.e. the order in which we traverse the callback context ... | null | {
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https://api.github.com/repos/scikit-learn/scikit-learn/issues/33323 | https://api.github.com/repos/scikit-learn/scikit-learn | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33323/labels{/name} | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33323/comments | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33323/events | https://github.com/scikit-learn/scikit-learn/issues/33323 | 3,963,985,859 | I_kwDOAAzd1s7sRZ_D | 33,323 | [Callbacks] FEA Define behavior for callbacks registered on estimators used in third party functions | {
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related to https://github.com/scikit-learn/scikit-learn/issues/27676
The current implementation requires that estimators used in meta-estimators can on... | null | {
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https://api.github.com/repos/scikit-learn/scikit-learn/issues/33322 | https://api.github.com/repos/scikit-learn/scikit-learn | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33322/labels{/name} | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33322/comments | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33322/events | https://github.com/scikit-learn/scikit-learn/pull/33322 | 3,963,850,580 | PR_kwDOAAzd1s7E7M89 | 33,322 | FEA Callbacks API | {
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"number": 6... | 0 | 2026-02-19T16:26:47 | 2026-03-06T09:25:08 | null | null | MEMBER | null | null | null | null | This PR comes from the ``callbacks`` feature branch where the developement of the callback API continues.
It implements the SLEP 023: https://github.com/scikit-learn/enhancement_proposals/pull/90. **Please don't review this PR directly for now**, but comment in the side PRs and issues instead. For now the main purpo... | null | {
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https://api.github.com/repos/scikit-learn/scikit-learn/issues/33321 | https://api.github.com/repos/scikit-learn/scikit-learn | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33321/labels{/name} | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33321/comments | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33321/events | https://github.com/scikit-learn/scikit-learn/pull/33321 | 3,962,161,056 | PR_kwDOAAzd1s7E1lQ9 | 33,321 | Add transformers names to FeatureUnion's HTML Display | {
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🙌 Thanks for contributing a pull request!
👀 Please ensure you have taken a look at the contribution guidelines:
https://github.com/scikit-learn/scikit-learn/blob/main/CONTRIBUTING.md
✅ In particular following the pull request checklist will increase the likelihood
of having maintainers review your PR:
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https://api.github.com/repos/scikit-learn/scikit-learn/issues/33320 | https://api.github.com/repos/scikit-learn/scikit-learn | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33320/labels{/name} | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33320/comments | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33320/events | https://github.com/scikit-learn/scikit-learn/pull/33320 | 3,962,018,832 | PR_kwDOAAzd1s7E1JVT | 33,320 | TST Xfail test for Python 3.13 free-threaded that fails intermittently in the Wheels CI | {
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There is not much point trying to investigate this more, since this only happens for Python 3.13 free-threaded not 3.14. | {
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https://api.github.com/repos/scikit-learn/scikit-learn/issues/33319 | https://api.github.com/repos/scikit-learn/scikit-learn | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33319/labels{/name} | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33319/comments | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33319/events | https://github.com/scikit-learn/scikit-learn/pull/33319 | 3,960,341,599 | PR_kwDOAAzd1s7EvyUX | 33,319 | ENH: More efficient calculation of sum of squared elements for univariate_selection | {
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In univariate selection, this new version does not require a copy of X, making it more efficient memory-wise.
The previous version required to calculate `X ** 2` (see `safe_sqr` in `sklearn.utils.extmath`), which made a copy of X | {
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Fixes #15873.
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Adds cardinality-based selection to `make_column_selector` via the new
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Fixes #33012.
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Fixes #32821.
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Fixes #33075.
#### What does this implement/fix? Explain your changes.
Adds a short `set_output` section with an example in the pipelines/composition
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Fixes #29167.
#### What does this implement/fix? Explain your changes.
Adds a “Beginner resources” section to the Getting Started guide with links
to the MOOC, ML map, and user guide. Adds a changelog fragment.
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Fixes #30389.
#### What does this implement/fix? Explain your changes.
Adds public `check_feature_names` and `check_n_features` wrappers in
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None
#### What does this implement/fix? Explain your changes.
This removes https://github.com/ploomber/sklearn-evaluation from the related projects site. It is archives as of 28 Febr 2025.
#### AI usage disclosure
None
#### Any other comments?
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After the Azure -> GHA migration (or a dependency update hard to know for sure) there seems to be at least 2 tests that fail for a single random seed see https://github.com/scikit-learn/scikit-learn/issues/33274#issuecomment-390765... | {
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Calling `.predict()` from a classifier may output different dtypes depending on what the input class and dtypes are, in a way that doesn't look consistent.
For example, the [docs for array API support](https://scikit-learn.org/stable/modules/array_ap... | {
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https://api.github.com/repos/scikit-learn/scikit-learn/issues/33307 | https://api.github.com/repos/scikit-learn/scikit-learn | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33307/labels{/name} | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33307/comments | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33307/events | https://github.com/scikit-learn/scikit-learn/pull/33307 | 3,956,230,216 | PR_kwDOAAzd1s7EiRp1 | 33,307 | Rename _data.py to _data.py | {
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🙌 Thanks for contributing a pull request!
👀 Please ensure you have taken a look at the contribution guidelines:
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✅ In particular following the pull request checklist will increase the likelihood
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https://api.github.com/repos/scikit-learn/scikit-learn/issues/33306 | https://api.github.com/repos/scikit-learn/scikit-learn | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33306/labels{/name} | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33306/comments | https://api.github.com/repos/scikit-learn/scikit-learn/issues/33306/events | https://github.com/scikit-learn/scikit-learn/pull/33306 | 3,955,279,615 | PR_kwDOAAzd1s7EfR8T | 33,306 | MNT Clean up dead code related to deprecated classes | {
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} | ### Describe the bug and give evidence about its user-facing impact
When using the new `init="classical_mds"` option in `MDS`, the number of components returned is always 2.
### Steps/Code to Reproduce
```python
import numpy as np
from sklearn.manifold import MDS
data = np.random.uniform(size=(20, 10))
model = MD... | {
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No issue involved.
#### What does this implement/fix? Explain your changes.
While compiling sk-learn, we get the following warnings for modules `_binary_tree.pyx.tp` and `_kd_tree.pxi.tp`:
```
[1/4] Generating sklearn/neighbors/_kd_tree_pyx with a custom command
[2/4] Generating ... | null | {
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- __init__(self, **kwargs: Any) -> None
- __setattr__(self, key: Any, value: Any) -> None
No runtime logic was changed. Inherited dict behavior is preserved.
All existing tests pass.
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The lines that should be the output of the FeatureUnion are incorrect in the HTML display.
See https://github.com/scikit-learn/scikit-learn/pull/31937#issuecomment-3908561441
### Steps/Code to Reproduce
```py
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When passing polars inputs for `check_X_y` that have float32 types in columns, under the default argument `dtype="numeric"`, inputs are processed as expected (returns float32 arrays), but if passing instead a list as dtype argument where float64 comes... | null | {
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The work-around is to make sure the first warnings also happens with... | {
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"node_id": "MDU6TGFiZWwxMzE0Mj... | open | false | [] | null | 2 | 2026-02-16T10:06:13 | 2026-02-16T10:55:57 | null | null | CONTRIBUTOR | null | null | {
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Hello,
sklearn.gaussian_process.GaussianProcessRegressor
does not scale to large datasets.
Apparently, VGP would:
https://arxiv.org/pdf/1511.06499
Regards,
Francois.
### Describe your proposed solution
Implement VGP.
### Describe alternatives you've considered, if re... | null | {
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- test_spectral_biclustering[97-csr_matrix]
- test_spectral_biclustering[97-csr_array] | {
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Adds support for , bringing it to feature parity with which already supports Huber loss.
Closes #31542
## How does it work?
The Huber loss is a robust loss that is quadratic for small residuals and linear for large ones, controlled by a threshold parameter `delta`. Following Fried... | null | {
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- replace the broken California housing source URL in the dataset description with the StatLib repository URL
- update the source comment in `sklearn/datasets/_california_housing.py` accordingly
## Why
Issue #33231 reports that the old URL times out and is no longer reliably reachable.
Closes #33231
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closes #33283
also related to #28975
#### What does this implement/fix? Explain your changes.
This fixes metadata routing in `learning_curve` and the metadata routing tests in `sklearn/model_selection/tests/test_validation.py`.
1. bug
With `exploit_incremental_learning=True` we call ... | null | {
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Fixes #33283.
#### What does this implement/fix? Explain your changes.
When using `learning_curve` with `exploit_incremental_learning=True` and passing scorer metadata (e.g. `sample_weight`) via the routing API, all training scores except the last come back as NaN.
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When using learning_curve with exploit_incremental_learning=True and passing sample_weight
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## Problem
When using `BisectingKMeans` with a callable `init`, `_validate_center_shape` always checked the shape of the returned centers against `self.n_clusters` (the total number of clusters). But for bisecting k-means, each bisection step passes `n_centroids=2` to `_init_centroids`, so the callable c... | {
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Hello! 👋
Thank you for maintaining this project — it’s really helpful!
While reading the README.md, I noticed that one of the code examples could be a bit unclear for beginners.
X – training features as a 2D array
y – target labels as a 1D array
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## Reference Issues/PRs
I did not find issues explicitly asking for this, but I was asked for it in a freelance project (and we agreed on making it open-source).
This helps with issue #27873 because HGB already supports `intera... | null | {
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Follow-up of #32644.
#### What does this implement/fix? Explain your changes.
Some fixes and extensions for Array API support in LogisticRegression and Newton solvers.
#### AI usage disclosure
None
#### Any other comments?
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#### What does this implement/fix?
`HDBSCAN.fit_predict()` raises `TypeError: only 0-dimensional arrays can be converted to Python scalars` when `cluster_selection_epsilon` is set and the input data contains tied distances.
The root cause is in `traverse_upwards` in `_tree.pyx`. Tied distances produce d... | {
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Replaced incorrect usage of "allows to" with "allows assigning" and "allows examining" to improve readability.
No logical code changes, purely documentation fix. | {
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See https://github.com/scipy/scipy/pull/24541.
#### What does this implement/fix? Explain your changes.
This PR removes our own implementation of the Yeo-Johnson transform, `_yeo_johnson_transform`, and replaces it with `scipy.stats.yeojohnson`.
#### AI usage disclosure
None
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Fixes #33205.
What does this implement/fix? Explain your changes.
This PR switches the matrix inversion logic in PCA.get_precision from a standard inverse (inv) to a Moore-Penrose pseudo-inverse (pinv).
Why this is necessary:
When working with singular or rank-deficient datasets (where f... | {
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Fixes #33256
#### What does this implement/fix? Explain your changes.
Fixes the BNP Paribas logo path in the funding footer of `doc/templates/index.html`.
Changed `_static/bnp-paribas.png` to `_images/bnp-paribas.jpg` to reference the correct existing image at `doc/images/bnp-parib... | {
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Fixes #32914
#### What does this implement/fix? Explain your changes.
This PR optimizes the `_logcosh` function in `FastICA` (used when `algorithm='deflation'` and `fun='logcosh'`) by vectorizing the operations for 1D arrays. Previously, this function used a Python loop over samples, whic... | null | {
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This PR fixes a bug where `PowerTransformer` and `QuantileTransformer` would raise a `UserWarning` ("X has feature names, but... was fitted without feature names") during `inverse_transform` when fitted with feature names.
This was caused by the use of `_check_input` (which validates against the inpu... | null | {
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- test_regression_synthetic[68] | {
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### Summary
This issue proposes integrating **Random k Conditional Nearest Neighbor (RkCNN)** — as described in *PeerJ Computer Science (2025)* — into a fully scikit-learn-compliant estimator interface, enabling seamless use with pipelines, cross-validation, and hyperpara... | {
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None
#### What does this implement/fix? Explain your changes.
This PR removes an unused function in class PowerTransformer.
#### AI usage disclosure
None | {
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#### AI usage disclosure
I used AI assistance for:
- [x] Code generation (e.g., when writing an implementation or fixing a bug)
- [x] Test/benchmark generation
-... | {
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This fixes the way `eigsh()` is called in spectral embedding. As a result, it gets faster:
```python
import numpy as np
from sklearn.manifold import SpectralEmbedding
from sklearn.datasets import make_swiss_roll
X, _ = make_swiss_roll(n_samples=10_000)
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Fixes mutable default arguments in `doc/sphinxext/doi_role.py`.
#### What does this implement/fix? Explain your changes.
This PR replaces mutable default arguments (`options={}` and `content=[]`) with `None` in the `reference_role` function.
In Python, default arguments are evaluated o... | null | {
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