PEP632: Remove depracted call of distutils.version.LooseVersion

conftest.py

@@ -1,5 +1,5 @@
 import sys
-from distutils.version import LooseVersion
+from packaging.version import Version
 import sklearn
 
 import pytest
@@ -13,9 +13,9 @@ def pytest_collection_modifyitems(config, items):
     try:
         import numpy as np
 
-        if LooseVersion(np.__version__) < LooseVersion("1.14") or LooseVersion(
+        if Version(np.__version__) < Version("1.14") or Version(
             sklearn.__version__
-        ) < LooseVersion("0.23.0"):
+        ) < Version("0.23.0"):
             reason = (
                 "doctests are only run for numpy >= 1.14 "
                 "and scikit-learn >=0.23.0"

environment.yml

@@ -3,3 +3,4 @@ dependencies:
   - numpy
   - scipy
   - scikit-learn
+  - packaging

setup.py

@@ -21,7 +21,12 @@
 LICENSE = "new BSD"
 DOWNLOAD_URL = "https://github.com/scikit-learn-contrib/scikit-learn-extra"
 VERSION = __version__  # noqa
-INSTALL_REQUIRES = ["numpy>=1.13.3", "scipy>=0.19.1", "scikit-learn>=0.23.0"]
+INSTALL_REQUIRES = [
+    "numpy>=1.13.3",
+    "scipy>=0.19.1",
+    "scikit-learn>=0.23.0",
+    "packaging",
+]
 CLASSIFIERS = [
     "Intended Audience :: Science/Research",
     "Intended Audience :: Developers",

sklearn_extra/cluster/_commonnn.py

@@ -6,7 +6,7 @@
 #
 # License: BSD 3 clause
 
-from distutils.version import LooseVersion
+from packaging.version import Version
 import warnings
 
 import numpy as np
@@ -15,7 +15,7 @@
 import sklearn
 from sklearn.base import BaseEstimator, ClusterMixin
 
-if LooseVersion(sklearn.__version__) < LooseVersion("0.23.0"):
+if Version(sklearn.__version__) < Version("0.23.0"):
     from sklearn.utils import check_array, check_consistent_length
 
     # In scikit-learn version 0.23.x use