Feature/upgrade python version (#85)

* Small fixes.

* Upgrade Python version according to SPEC 0.

This fixes the minimum supported version to Python 3.10, according to
SPEC 0 (https://scientific-python.org/specs/spec-0000/).
It also adds Python 3.10, 3.11 and 3.12 to the CI test matrix.

distutils was used for CRAN and is removed in Python 3.12. It is
replaced by the third-party module packaging.

Author: vnmabus

.github/workflows/tests.yml

@@ -9,7 +9,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: ['3.8', '3.9', '3.10']
+        python-version: ['3.10', '3.11', '3.12']
     steps:
     - uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python-version }} on ${{ matrix.os }}

pyproject.toml

@@ -25,7 +25,7 @@ classifiers = [
 ]
 dependencies = ["numpy", "scipy", "scikit-learn"]
 [project.optional-dependencies]
-cran = ["rdata"]
+cran = ["packaging", "rdata"]
 forex = ["forex_python>=1.6"]
 keel = ["pandas"]
 keras = ["tensorflow"]

skdatasets/repositories/cran.py

@@ -11,7 +11,6 @@
 import re
 import urllib
 import warnings
-from distutils.version import LooseVersion
 from html.parser import HTMLParser
 from pathlib import Path
 from typing import (
@@ -28,11 +27,11 @@
 
 import numpy as np
 import pandas as pd
+import rdata
+from packaging.version import Version
 from sklearn.datasets import get_data_home
 from sklearn.utils import Bunch
 
-import rdata
-
 from .base import DatasetNotFoundError, fetch_tgz as _fetch_tgz
 
 CRAN_URL: Final = "https://CRAN.R-project.org"
@@ -105,7 +104,7 @@ def _get_latest_version_offline(package_name: str) -> str | None:
 
     if downloaded_packages:
         versions = [
-            LooseVersion(p.name[(len(package_name) + 1) : -len(".tar.gz")])
+            Version(p.name[(len(package_name) + 1):-len(".tar.gz")])
             for p in downloaded_packages
         ]