Updated imports

Assume Scikit-Learn 1.0 or newer.

sklearn2pmml/__init__.py

@@ -1,16 +1,8 @@
 from pandas import CategoricalDtype
 from sklearn.base import BaseEstimator
+from sklearn.compose import ColumnTransformer
 from sklearn.exceptions import NotFittedError
-try:
-	from sklearn.compose import ColumnTransformer
-except ImportError:
-	class ColumnTransformer:
-		pass
-try:
-	from sklearn.feature_selection._base import SelectorMixin
-except ImportError:
-	from sklearn.feature_selection.base import SelectorMixin
-from sklearn.feature_selection import SelectFromModel
+from sklearn.feature_selection import SelectFromModel, SelectorMixin
 from sklearn.pipeline import FeatureUnion, Pipeline
 from sklearn_pandas import DataFrameMapper
 from sklearn2pmml.resources import _package_classpath

sklearn2pmml/ensemble/__init__.py

@@ -1,9 +1,6 @@
 from sklearn.base import clone, BaseEstimator, ClassifierMixin, RegressorMixin
-try:
-	from sklearn.linear_model import LinearRegression
-	from sklearn.linear_model._base import LinearClassifierMixin, LinearModel, SparseCoefMixin
-except ImportError:
-	from sklearn.linear_model.base import LinearClassifierMixin, LinearModel, LinearRegression, SparseCoefMixin
+from sklearn.linear_model import LinearRegression
+from sklearn.linear_model._base import LinearClassifierMixin, LinearModel, SparseCoefMixin
 from sklearn.preprocessing import OneHotEncoder
 from sklearn.utils.metaestimators import _BaseComposition
 from sklearn2pmml.util import eval_rows, fqn, to_expr_func, Predicate

sklearn2pmml/feature_selection/__init__.py

@@ -1,9 +1,6 @@
 from pandas import DataFrame
 from sklearn.base import BaseEstimator
-try:
-	from sklearn.feature_selection._base import SelectorMixin
-except ImportError:
-	from sklearn.feature_selection.base import SelectorMixin
+from sklearn.feature_selection import SelectorMixin
 from sklearn.utils.validation import check_is_fitted
 from sklearn2pmml.util import to_numpy