Sklearn 1.6 compat (#70)

pyproject.toml

@@ -11,7 +11,7 @@ urls.Documentation = "https://sklearn-ann.readthedocs.io/"
 dynamic = ["version", "readme"]
 requires-python = "<3.13,>=3.9"  # enforced by scipy
 dependencies = [
-    "scikit-learn>=0.24.0",
+    "scikit-learn>=1.6.0",
     "scipy>=1.11.1,<2.0.0",
 ]
 
@@ -23,7 +23,7 @@ tests = [
 docs = [
     "sphinx>=7",
     "sphinx-gallery>=0.8.2",
-    "sphinx-book-theme>=1.1.0rc1",
+    "sphinx-book-theme>=1.1.0",
     "sphinx-issues>=1.2.0",
     "numpydoc>=1.1.0",
     "matplotlib>=3.3.3",
@@ -37,6 +37,7 @@ faiss = [
 ]
 pynndescent = [
     "pynndescent>=0.5.1,<1.0.0",
+    "numba>=0.52",
 ]
 nmslib = [
     "nmslib>=2.1.1,<3.0.0 ; python_version < '3.11'",
@@ -84,16 +85,14 @@ ignore = [
 [tool.ruff.lint.isort]
 known-first-party = ["sklearn_ann"]
 
-[tool.hatch.envs.default]
-features = [
-  "tests",
-  "docs",
-  "annlibs",
-]
+[tool.hatch.envs.docs]
+installer = "uv"
+features = ["docs", "annlibs"]
+scripts.build = "sphinx-build -M html docs docs/_build"
 
-[tool.hatch.envs.default.scripts]
-test = "pytest {args:tests}"
-build-docs = "sphinx-build -M html docs docs/_build"
+[tool.hatch.envs.hatch-test]
+default-args = []
+features = ["tests", "annlibs"]
 
 [tool.hatch.build.targets.wheel]
 packages = ["src/sklearn_ann"]

src/sklearn_ann/cluster/rnn_dbscan.py

@@ -1,8 +1,11 @@
 from collections import deque
+from typing import cast
 
 import numpy as np
 from sklearn.base import BaseEstimator, ClusterMixin
 from sklearn.neighbors import KNeighborsTransformer
+from sklearn.utils import Tags
+from sklearn.utils.validation import validate_data
 
 from ..utils import get_sparse_row
 
@@ -143,7 +146,7 @@ def __init__(
         self.keep_knns = keep_knns
 
     def fit(self, X, y=None):
-        X = self._validate_data(X, accept_sparse="csr")
+        X = validate_data(self, X, accept_sparse="csr")
         if self.input_guarantee == "none":
             algorithm = KNeighborsTransformer(n_neighbors=self.n_neighbors)
             X = algorithm.fit_transform(X)
@@ -181,6 +184,11 @@ def drop_knns(self):
         del self.knns_
         del self.rev_knns_
 
+    def __sklearn_tags__(self) -> Tags:
+        tags = cast(Tags, super().__sklearn_tags__())
+        tags.input_tags.sparse = True
+        return tags
+
 
 def simple_rnn_dbscan_pipeline(
     neighbor_transformer, n_neighbors, n_jobs=None, keep_knns=None, **kwargs

src/sklearn_ann/kneighbors/annoy.py

@@ -2,6 +2,8 @@
 import numpy as np
 from scipy.sparse import csr_matrix
 from sklearn.base import BaseEstimator, TransformerMixin
+from sklearn.utils import Tags, TargetTags, TransformerTags
+from sklearn.utils.validation import validate_data
 
 from ..utils import TransformerChecksMixin
 
@@ -16,7 +18,7 @@ def __init__(self, n_neighbors=5, *, metric="euclidean", n_trees=10, search_k=-1
         self.metric = metric
 
     def fit(self, X, y=None):
-        X = self._validate_data(X)
+        X = validate_data(self, X)
         self.n_samples_fit_ = X.shape[0]
         metric = self.metric if self.metric != "sqeuclidean" else "euclidean"
         self.annoy_ = annoy.AnnoyIndex(X.shape[1], metric=metric)
@@ -68,8 +70,9 @@ def _transform(self, X):
 
         return kneighbors_graph
 
-    def _more_tags(self):
-        return {
-            "_xfail_checks": {"check_estimators_pickle": "Cannot pickle AnnoyIndex"},
-            "requires_y": False,
-        }
+    def __sklearn_tags__(self) -> Tags:
+        return Tags(
+            estimator_type="transformer",
+            target_tags=TargetTags(required=False),
+            transformer_tags=TransformerTags(),
+        )

src/sklearn_ann/kneighbors/faiss.py

@@ -8,6 +8,8 @@
 from joblib import cpu_count
 from scipy.sparse import csr_matrix
 from sklearn.base import BaseEstimator, TransformerMixin
+from sklearn.utils import Tags, TargetTags, TransformerTags
+from sklearn.utils.validation import validate_data
 
 from ..utils import TransformerChecksMixin, postprocess_knn_csr
 
@@ -85,7 +87,7 @@ def _metric_info(self):
 
     def fit(self, X, y=None):
         normalize = self._metric_info.get("normalize", False)
-        X = self._validate_data(X, dtype=np.float32, copy=normalize)
+        X = validate_data(self, X, dtype=np.float32, copy=normalize)
         self.n_samples_fit_ = X.shape[0]
         if self.n_jobs == -1:
             n_jobs = cpu_count()
@@ -157,14 +159,11 @@ def _transform(self, X):
     def fit_transform(self, X, y=None):
         return self.fit(X, y=y)._transform(X=None)
 
-    def _more_tags(self):
-        return {
-            "_xfail_checks": {
-                "check_estimators_pickle": "Cannot pickle FAISS index",
-                "check_methods_subset_invariance": "Unable to reset FAISS internal RNG",
-            },
-            "requires_y": False,
-            "preserves_dtype": [np.float32],
+    def __sklearn_tags__(self) -> Tags:
+        return Tags(
+            estimator_type="transformer",
+            target_tags=TargetTags(required=False),
+            transformer_tags=TransformerTags(preserves_dtype=[np.float32]),
             # Could be made deterministic *if* we could reset FAISS's internal RNG
-            "non_deterministic": True,
-        }
+            non_deterministic=True,
+        )

src/sklearn_ann/kneighbors/nmslib.py

@@ -2,6 +2,8 @@
 import numpy as np
 from scipy.sparse import csr_matrix
 from sklearn.base import BaseEstimator, TransformerMixin
+from sklearn.utils import Tags, TransformerTags
+from sklearn.utils.validation import validate_data
 
 from ..utils import TransformerChecksMixin, check_metric
 
@@ -28,7 +30,7 @@ def __init__(
         self.n_jobs = n_jobs
 
     def fit(self, X, y=None):
-        X = self._validate_data(X)
+        X = validate_data(self, X)
         self.n_samples_fit_ = X.shape[0]
 
         check_metric(self.metric, METRIC_MAP)
@@ -62,8 +64,8 @@ def transform(self, X):
 
         return kneighbors_graph
 
-    def _more_tags(self):
-        return {
-            "_xfail_checks": {"check_estimators_pickle": "Cannot pickle NMSLib index"},
-            "preserves_dtype": [np.float32],
-        }
+    def __sklearn_tags__(self) -> Tags:
+        return Tags(
+            estimator_type="transformer",
+            transformer_tags=TransformerTags(preserves_dtype=[np.float32]),
+        )

src/sklearn_ann/utils.py

@@ -1,5 +1,6 @@
 import numpy as np
 from scipy.sparse import csr_matrix
+from sklearn.utils.validation import validate_data
 
 
 def check_metric(metric, metrics):
@@ -90,6 +91,6 @@ class TransformerChecksMixin:
     def _transform_checks(self, X, *fitted_props, **check_params):
         from sklearn.utils.validation import check_is_fitted
 
-        X = self._validate_data(X, reset=False, **check_params)
+        X = validate_data(self, X, reset=False, **check_params)
         check_is_fitted(self, *fitted_props)
         return X

tests/test_common.py

@@ -31,6 +31,15 @@
     pytest.param(KDTreeTransformer),
 ]
 
+PER_ESTIMATOR_XFAIL_CHECKS = {
+    AnnoyTransformer: dict(check_estimators_pickle="Cannot pickle AnnoyIndex"),
+    FAISSTransformer: dict(
+        check_estimators_pickle="Cannot pickle FAISS index",
+        check_methods_subset_invariance="Unable to reset FAISS internal RNG",
+    ),
+    NMSlibTransformer: dict(check_estimators_pickle="Cannot pickle NMSLib index"),
+}
+
 
 def add_mark(param, mark):
     return pytest.param(*param.values, marks=[*param.marks, mark], id=param.id)
@@ -51,7 +60,10 @@ def add_mark(param, mark):
     ],
 )
 def test_all_estimators(Estimator):
-    check_estimator(Estimator())
+    check_estimator(
+        Estimator(),
+        expected_failed_checks=PER_ESTIMATOR_XFAIL_CHECKS.get(Estimator, {}),
+    )
 
 
 # The following critera are from: