update pre-commit config (#716)

* update pre-commit config

* Update for 0.23.2

Author: TomAugspurger

.pre-commit-config.yaml

@@ -3,14 +3,14 @@ repos:
     rev: 19.10b0
     hooks:
     - id: black
-      language_version: python3.7
+      language_version: python3
 -   repo: https://gitlab.com/pycqa/flake8
     rev: 3.7.9
     hooks:
     - id: flake8
-      language_version: python3.7
+      language_version: python3
 -   repo: https://github.com/timothycrosley/isort
     rev: 4.3.21
     hooks:
     - id: isort
-      language_version: python3.7
+      language_version: python3

dask_ml/_compat.py

@@ -16,6 +16,7 @@
 PANDAS_VERSION = packaging.version.parse(pandas.__version__)
 DISTRIBUTED_VERSION = packaging.version.parse(distributed.__version__)
 
+SK_0_23_2 = SK_VERSION >= packaging.version.parse("0.23.2")
 SK_024 = SK_VERSION >= packaging.version.parse("0.24.0.dev0")
 DASK_240 = DASK_VERSION >= packaging.version.parse("2.4.0")
 DASK_2130 = DASK_VERSION >= packaging.version.parse("2.13.0")

tests/model_selection/dask_searchcv/test_model_selection.py

@@ -43,7 +43,7 @@
 from sklearn.svm import SVC
 
 import dask_ml.model_selection as dcv
-from dask_ml._compat import DISTRIBUTED_2_11_0, SK_024, WINDOWS
+from dask_ml._compat import DISTRIBUTED_2_11_0, SK_0_23_2, WINDOWS
 from dask_ml.model_selection import check_cv, compute_n_splits
 from dask_ml.model_selection._search import _normalize_n_jobs
 from dask_ml.model_selection.methods import CVCache
@@ -488,7 +488,7 @@ def check_scores_all_nan(gs, bad_param, score_key="score"):
     )
 
 
-@pytest.mark.xfail(SK_024, reason="https://github.com/dask/dask-ml/issues/672")
+@pytest.mark.xfail(SK_0_23_2, reason="https://github.com/dask/dask-ml/issues/672")
 @pytest.mark.parametrize(
     "weights", [None, (None, {"tr0": 2, "tr2": 3}, {"tr0": 2, "tr2": 4})]
 )