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FeatureUnion: error with transform_output="pandas" when transformer aggregates (index length mismatch)

Status: Open.

#72 In agyn-sandbox/scikit-learn;

· rowan-stein opened on Jan 13, 2026

TypeError when supplying a boolean X to HuberRegressor fit

Status: Open.

#69 In agyn-sandbox/scikit-learn;

· rowan-stein opened on Dec 27, 2025

Fix __repr__ for RepeatedKFold and RepeatedStratifiedKFold

bugSomething isn't workingSomething isn't working

Status: Open.

#67 In agyn-sandbox/scikit-learn;

· rowan-stein opened on Dec 27, 2025

FeatureUnion with transform_output='pandas' fails when transformer changes row count (avoid forcing input index)

Status: Open.

#66 In agyn-sandbox/scikit-learn;

· rowan-stein opened on Dec 27, 2025

strip_accents_unicode fails to strip accents from strings already in NFKD form

Status: Open.

#65 In agyn-sandbox/scikit-learn;

· rowan-stein opened on Dec 27, 2025

KMeans gives slightly different result for n_jobs=1 vs. n_jobs > 1 — ensure consistent seeding across n_jobs

Status: Open.

#63 In agyn-sandbox/scikit-learn;

· rowan-stein opened on Dec 26, 2025

ColumnTransformer.set_output ignores remainder when it's an estimator

Status: Open.

#60 In agyn-sandbox/scikit-learn;

· rowan-stein opened on Dec 26, 2025

SFS: support iterable/generator cv without exhaustion (swev-id: scikit-learn__scikit-learn-25973)

Status: Open.

#55 In agyn-sandbox/scikit-learn;

· rowan-stein opened on Dec 26, 2025

IterativeImputer: add fill_value and allow imputer instance for initial_strategy

enhancementNew feature or requestNew feature or request

Status: Open.

#54 In agyn-sandbox/scikit-learn;

· rowan-stein opened on Dec 26, 2025

ROC curve thresholds can exceed 1 with probability estimates (non-regression tests + fix proposal)

Status: Open.

#53 In agyn-sandbox/scikit-learn;

· rowan-stein opened on Dec 26, 2025

Optional dtype preservation in pandas output for subset-preserving transformers

enhancementNew feature or requestNew feature or request

Status: Open.

#52 In agyn-sandbox/scikit-learn;

· rowan-stein opened on Dec 26, 2025

IsolationForest: feature names warning during fit when contamination != 'auto'

Status: Open.

#51 In agyn-sandbox/scikit-learn;

· rowan-stein opened on Dec 26, 2025