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N/A
#### What does this implement/fix? Explain your changes.
This PR adds a basic example showing how to use `train_test_split` with
`LogisticRegression`. It demonstrates splitting the data, training the model,
and evaluating accuracy. The goal is to help beginners understand the st... | {
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Sorry @AnneBeyer it would have been something you could have done indeed, but I only noticed your comment once I already did the work and was about to open the PR :sweat_smile:. Feel free to review my... | {
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nan_euclidean_distances is producing asymmetrical matrix when input matrix contains nan values. This, in turn, causes errors when checked for symmetry, for example by scipy.spatial.distance.squareform.
### Steps/Code to Reproduce
```Python
mat = np.random.rand(10, 20)
dist = nan_euclidean_distan... | null | {
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-it will ensure thar every dependency version follows a valid pattern. (like 1.24.1)
2.added sanity check for known tags:
-it will validates that every tag (e.g., build, install, docs, tests) exists in the allowed list.
3.added helper get_min_version:
-this will make... | {
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#### AI usage disclosure
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Warnings for `alpha=0` / `l1_ratio=0` where introduced in #620. A note that Enet with dual gap as stopping criterion does not converge was mentioned in https://github.com/scikit-learn/scikit-learn/pull/19620#issue-822947581.
#### What does this implement/fix? Explain your changes.
This PR... | {
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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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closes #32076
supersedes #32239
**superseded by #33089**
#### What does this implement/fix? Explain your changes.
- adds a `groups` param to `TargetEncoder.fit_transform` that then internally picks a suitable non-overlapping cross-validation strategy (in its cross-fitting).
- adds mor... | {
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Aftermath of #32014 and #32811
#### What does this implement/fix? Explain your changes.
In current main, screening is not activated for `MultiTaskElasticNet` and `MultiTaskLasso` because they do not call `enet_path` but `enet_coordinate_descent_multi_task` directly.
#### Any other co... | {
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PR https://github.com/scikit-learn/scikit-learn/pull/30763 was listed already in version 1.7 [release highlights](https://scikit-learn.org/stable/auto_examples/release_highlights/plot_release_highlights_1_7_0.html#release-highlights-for-scikit-learn-1-7:~:text=estimator%E2%80%99s%20HTML%20represent... | {
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While investigating the issue above, I realized that we needed unittest for array API support for `_safe_indexing`.
I am not yet sure if this problem already existing in 1.7 or not. If it was I will add a changelog entry. | {
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Closes #32836
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} | ### Describe the bug
This might be related to #32836 (or not).
I think we need a common test to check that enabling array API support does not affect estimators (without array API support) when called on regular NumPy (or other valid non-array inputs).
This bug might be a regression.
### Steps/Code to Reproduce
``... | {
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Enabling the array API dispatch has a negative side effect on code that usually accepts non-array inputs such as pandas dataframes:
### Steps/Code to Reproduce
```python
# %%
import os
os.environ["SCIPY_ARRAY_API"] = "1"
# %%
import sklearn
from sklearn.datasets import fetch_openml
from sklearn... | {
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https://api.github.com/repos/scikit-learn/scikit-learn/issues/32835 | https://api.github.com/repos/scikit-learn/scikit-learn | https://api.github.com/repos/scikit-learn/scikit-learn/issues/32835/labels{/name} | https://api.github.com/repos/scikit-learn/scikit-learn/issues/32835/comments | https://api.github.com/repos/scikit-learn/scikit-learn/issues/32835/events | https://github.com/scikit-learn/scikit-learn/pull/32835 | 3,693,529,793 | PR_kwDOAAzd1s63AeQK | 32,835 | MNT Use Pyodide 0.29 version to avoid micropip error inside JupyterLite | {
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Tested locally this works fine. Let's see if CI has something to say about it. Full disclosure: I don't remember whether the JupyterLite in CircleCI artifacts is functional or not ...
Quickly looking at the Pyodide [0.28](https://blog.pyodide.org/posts/0.28-release/) and [0.29](https://blog.pyodide.or... | {
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https://api.github.com/repos/scikit-learn/scikit-learn/issues/32834 | https://api.github.com/repos/scikit-learn/scikit-learn | https://api.github.com/repos/scikit-learn/scikit-learn/issues/32834/labels{/name} | https://api.github.com/repos/scikit-learn/scikit-learn/issues/32834/comments | https://api.github.com/repos/scikit-learn/scikit-learn/issues/32834/events | https://github.com/scikit-learn/scikit-learn/issues/32834 | 3,693,379,885 | I_kwDOAAzd1s7cJIEt | 32,834 | RFC: Potential improvement of HTML Display's css logic | {
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Every time that a cell in a jupyter notebook (or similar) uses the HTML display method, a new CSS block is added to the DOM. This happens in [`estimator_html_repr`](https://github.com/scikit-learn/scikit-learn/blob/4a10d0ed8d85e6... | {
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https://api.github.com/repos/scikit-learn/scikit-learn/issues/32833 | https://api.github.com/repos/scikit-learn/scikit-learn | https://api.github.com/repos/scikit-learn/scikit-learn/issues/32833/labels{/name} | https://api.github.com/repos/scikit-learn/scikit-learn/issues/32833/comments | https://api.github.com/repos/scikit-learn/scikit-learn/issues/32833/events | https://github.com/scikit-learn/scikit-learn/issues/32833 | 3,690,841,094 | I_kwDOAAzd1s7b_cQG | 32,833 | Broken dev website JupyterLite since December 2 | {
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Maybe related to merging https://github.com/scikit-learn/scikit-learn/pull/32824, maybe something else in the world that changed.
Noticed thanks to https://github.com/lesteve/test-scikit-learn-jupyterlite
Error in browser consol... | {
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https://api.github.com/repos/scikit-learn/scikit-learn/issues/32832 | https://api.github.com/repos/scikit-learn/scikit-learn | https://api.github.com/repos/scikit-learn/scikit-learn/issues/32832/labels{/name} | https://api.github.com/repos/scikit-learn/scikit-learn/issues/32832/comments | https://api.github.com/repos/scikit-learn/scikit-learn/issues/32832/events | https://github.com/scikit-learn/scikit-learn/pull/32832 | 3,690,743,690 | PR_kwDOAAzd1s623EXe | 32,832 | CI: Make one tracking isssue per build for the unit-tests GHA | {
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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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For completeness:
- this way is a bit hacky but works fine: you add manually a `:pr:` with the right PR and the second PR is based on the number inside the file... | {
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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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Fixes #15389, follow-up of #32747.
#### What does this implement/fix? Explain your changes.
This PR enables `LogisticRegressionCV` to correctly work when the CV folds do not contain all classes and the `scoring` argument is explicitly passed.
#### Any other comments?
I don't like my o... | {
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- we need to catch `BufferError` as per the [`__dlpack__` spec](https://data-apis.org/array-api/latest/API_specification/generated/array_api.array.__dlpack__.html#:~:text=dl_device,-(Optional)
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Fixes #32805. Follow-up to #31414.
#### What does this implement/fix? Explain your changes.
We add a new option `max_samples=None` in Bagging estimators, with the meaning of "draw exactly n_samples", and we make it the new default. This ensures that the number of bootstrap samples u... | {
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### Note
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### Note
If the CI tasks fail, create a new branch based on this PR and add the required fixes to that branch. | {
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```
/home/circleci/project/sklearn/linear_model/_logistic.py:docstring of sklearn.linear_model._logistic.LogisticRegression:127: ERROR: Unexpected indentation. [docutils]
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https://api.github.com/repos/scikit-learn/scikit-learn/issues/32818 | https://api.github.com/repos/scikit-learn/scikit-learn | https://api.github.com/repos/scikit-learn/scikit-learn/issues/32818/labels{/name} | https://api.github.com/repos/scikit-learn/scikit-learn/issues/32818/comments | https://api.github.com/repos/scikit-learn/scikit-learn/issues/32818/events | https://github.com/scikit-learn/scikit-learn/pull/32818 | 3,677,523,110 | PR_kwDOAAzd1s62KfET | 32,818 | DOC Fix changelog fragment filename | {
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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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Unable to find junit file. Please see link for details. | {
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👀 Please ensure you have taken a look at the contribution guidelines:
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- Added missing spaces in the tuple `{'l2','none'}` → `{'l2', 'none'}`.
- Fixed spacing in the l1_ratio condition `0 <l1_ratio <1` → `0 < l1_ratio < 1`.
These changes improve readability and maintain consistency with the scikit-... | {
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Previou... | null | {
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I know better than to get into discussions related to https://github.com/scikit-learn/scikit-learn/issues/32500, so I've left that alone, but this at least ensures that running `pre-commit` in a current PR doesn't result in unrela... | {
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"number": 6... | 4 | 2025-11-28T15:04:41 | 2025-12-01T20:45:45 | 2025-11-29T04:17:01 | null | MEMBER | null | null | null | null | #### Reference Issues/PRs
#32747
#### What does this implement/fix? Explain your changes.
Tiny fix of whatsnew entry.
#### Any other comments?
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Aftermath of #32014.
#### What does this implement/fix? Explain your changes.
This fixes a tiny code bug. I think it does (almost never) influence fitting an estimator.
#### Any other comments?
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Worked on it together with @lesteve.
Part of #32434. | {
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- [x] array API support, do we want to add a non-executed snippet with PyTorch (and maybe CalibratedClassifierCV with temperature scaling)?
- [x] free-threaded do something similar as 1.6... | {
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The change... | {
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https://scikit-learn.org/dev/whats_new/v1.9.html
https://scikit-learn.org/dev/whats_new/v1.8.html
Maybe this is normal but I got there trying to figure out why 1.8.0rc1 was breaking some ... | {
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> `max_samples` is now interpreted as a fraction of `sample_weight.sum()` instead of `X.shape[0]` when passed as a float.
Because `max_samples` default to `1.0`, this is a change of the default behavior. I expressed concerns about this change in this thread https://github.com/... | {
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https://github.com/scikit-learn/scikit-learn/pull/32549#issuecomment-3428908083
#### What does this implement/fix? Explain your changes.
This PR cleans up double calls to `check_array(y_pred, ...)` in `brier_score_loss`, `d2_brier_score` and `d2_log_loss_score`, that had been introduced ... | {
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Fixes a typo in the 1.8 changelog to display the following item properly:
<img width="783" height="84" alt="image" src="https://github.com/user-attachments/assets/7d42d663-7bac-4229-874b-ee370b371f12" />
cc @lesteve | {
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The root cause is in sklearn/utils/parallel.py where the delayed function checks if it's being used with sklearn's Parallel and raises a warning if not. In cp313t, this warning mechanism is thread-unsafe. We need to modify the warning handling in the delayed function to be thread-safe by using a lock o... | {
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- Raises ValueError for metric='manhattan'
- Enables incremental fit without storing full history
- Adds tests ensuring equivalence to full-batch fit
Fixes scikit-learn#12952
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I triggered a full doc build, just in case.
cc @jeremiedbb | {
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Not 100% sure about timing, I guess this can be merged roughly at the same time as #32766 is merged?
I followed the [maintainer doc](https://scikit-learn.org/dev/developers/maintainer.html) and drew inspiration from https:... | {
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Ref: https://github.com/scikit-learn/scikit-learn/pull/32422/files#r2548690179
#### What does this implement/fix? Explain your changes.
Moves the array API tests for continuous metrics added in #32422 to `test_common.py`, so they can be re-used for other continuous metrics (e.g., #326... | null | {
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Follow up to #32715, specifically see https://github.com/scikit-learn/scikit-learn/pull/32715#discussion_r2538148882
#### What does this implement/fix? Explain your changes.
* Removes the line "and everyone is welcome to contribute"
* Make it more clear that this is not a good place to... | {
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Sorry all, small typo fixes from #32715, noticed when I checked the rendered docs. This just adds `"` around label names.
I had a look at `contributing.rst` and we seem to use `"` over `'` so I have as well to conform.
#### What does this implement/fix? Explain your changes.
#### A... | {
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I think the previous test was not testing anything which is probably why we never noticed see https://github.com/scikit-learn/scikit-learn/pull/31656/files#r2334147276 ...
cc @jeremiedbb | {
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"node_id": ... | open | false | [] | null | 7 | 2025-11-25T12:28:38 | 2026-01-08T13:36:10 | null | null | NONE | null | null | null | null | #### Reference Issue
Fixes #28368 (ref: #32788 which is a duplicate issue)
#### What does this implement/fix? Explain your changes.
This PR fixes a bug where `TSNE` with `init='pca'` produces `NaN` values (leading to potential segmentation faults in the C++ extension) when the input data has zero variance (constan... | null | {
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When running `TSNE.fit_transform`, if numbers produced during the initialization somehow turned to NaN, it will segfault the process instead of throwing a python exception.
### Steps/Code to Reproduce
```python
import numpy as np
from sklearn.manifold import TSNE
X = np.ones((10,5))
TSNE(init="p... | {
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https://github.com/scikit-learn/scikit-learn/issues/31315
This PR introduces a small private `_LinearPredictMixin` and wires it into `BaseSGDRegressor` to remove duplicated linear-prediction code while keeping behavior identical.
## Motivation
- `SGDClassifier` uses helper mixins and `SGDRegress... | {
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#### Reference Issues/PRs
Fixes LinearSVR in #16298.
#### What does this implement/fix? Explain your changes.
I have found that the solver selector referenced in this mr was wrong and selecting l1 instead of l2 loss.
First lets look at the LinearSVR and to be more specific the loss type at line 588. It is c... | {
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Added class_weight to all bayes algorithms and updated the test file with corresponding tests for the weight_class added.
@adrinjalali @StefanieSenger | {
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This helper is kept private (_LinearPredictMixin) and only used by classifier mixin and the SGD base class.
We intentionally do not use it widely in LinearModel base class to avoid modifying the many non-SGD regressors.
MRO was carefully chosen to avoid conflicts.
**Summary :**
This P... | {
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> This is not a good first issue to contribute. Great if you are interested to contribute to scikit-learn 🙏. Please have a look at our [contributing doc](https://scikit-learn.org/dev/developers/contributing.html) and in particular the section [Issues for new contributors](https://scikit-learn.org/dev/deve... | null | {
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I have added class_weight in all the bayesian algorithms in the naive_bayes.py, also updated new test for class_weight in naive_bayes_test.py .
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This helper is kept private (`_LinearPredictMixin`) and only used by classifier mixin and the SGD base class.
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MRO was carefully chosen to avoid conflicts.
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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://docs.pytest.org/en/9.0.x/reference/reference.html#confval-faulthandler_exit_on_timeout
This should make it possible to debug rare deadlocks more easily if they randomly happen on the CI. This might become more useful if we start to use Python thread... | {
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### Note
If the CI tasks fail, create a new branch based on this PR and add the required fixes to that branch. | {
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Fixes #30389. Continues work from #32481.
#### What does this implement/fix? Explain your changes.
This PR refactors feature validation to centralize checks and expose useful validation utilities.
Refactoring: Replaces direct calls to private `_check_feature_names` and `_check_n_feat... | {
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None.
#### What does this implement/fix? Explain your changes.
Fixes a typo in the MacPorts installation instructions.
The package name was incorrectly documented as `py<XY>-scikits-learn`, while the actual MacPorts port is `py<XY>-scikit-learn`.
Updated the documentation to reflect... | {
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- Added `class_weight` parameter accepting `None`, `'balanced'`, or a dict
- Converts class weights to sample weights internally using `compute_sample_weight()`
- Multiplies with user-provided `sample_weight` if both are specified
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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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* [x] Cleanup the doc repo to free up space
* [x] Set the version number in the release branch
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Ref: https://github.com/scikit-learn/scikit-learn/pull/30395#discussion_r2545517923
#### What does this implement/fix? Explain your changes.
This is just for completeness, testing multiclass and multilabel is probably adequate but this brings it in line with other metrics.
#### Any o... | {
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Follow up on previously closed PR #31147 and issue [#30707](https://github.com/scikit-learn/scikit-learn/issues/30707)
#### What does this implement/fix? Explain your changes.
Adds sample weights within the QuantileTransformer under preprocessing using the _weighted_percentile function... | null | {
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Partially fixes #32725
#### What does this implement/fix? Explain your changes.
Use `global_random_seed` to avoid the test to randomly fail due to bad luck (only happens on some platforms like debian 32 bits, and something like once every 300-500 runs...). | {
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None
#### What does this implement/fix? Explain your changes.
Over time, `test_logistic.py` has grown to more than 2600 lines of code with duplicate tests.
This PR reorders some of the tests and removes some of the duplicate ones.
#### Any other comments?
In case of doubt, follow... | {
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Fixes partially #32725
Close https://github.com/scikit-learn/scikit-learn/issues/32765
#### What does this implement/fix? Explain your changes.
very slightly decrease strictness in `test_mcd` to fix flakyness: 75 -> 74 | {
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Fixes part of #32725
#### What does this implement/fix? Explain your changes.
small `atol` increase to fix graphical lasso test flakyness
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Partially fixes #32725
#### What does this implement/fix? Explain your changes.
Just changed the `atol` to `1e-11` in some `assert_all_close` which was failing comparing 0 with very small values (~2e-12).
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Follow up to [#31829](https://github.com/scikit-learn/scikit-learn/pull/31829)
Related to #31274 (and loosely #28668)
#### What does this implement/fix? Explain your changes.
Adds a common test to check that a metric supports. The idea is that we can just add metrics to this common t... | {
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**Root Cause**
The crash was caused by an out-of-bounds memory access in `precompute_absolute_errors`.
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I encountered the following bug while doing an outlier analysis on a large dataset:
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(IA generated, but read and pruned by a human ^^)
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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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"patch_url": "https://github.com/scikit-learn/scikit-learn/pull/32751.patch",
"merge... | true |
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