[ENH] Make dummy regressor file private (#2069)

* make dummy regressor file private

Author: TonyBagnall

aeon/regression/__init__.py

@@ -5,5 +5,5 @@
     "DummyRegressor",
 ]
 
+from aeon.regression._dummy import DummyRegressor
 from aeon.regression.base import BaseRegressor
-from aeon.regression.dummy import DummyRegressor

aeon/regression/dummy.py renamed to aeon/regression/_dummy.py

@@ -43,7 +43,7 @@ class DummyRegressor(BaseRegressor):
 
     Examples
     --------
-    >>> from aeon.regression.dummy import DummyRegressor
+    >>> from aeon.regression._dummy import DummyRegressor
     >>> from aeon.datasets import load_covid_3month
     >>> X_train, y_train = load_covid_3month(split="train")
     >>> X_test, y_test = load_covid_3month(split="test")

aeon/regression/tests/test_base.py

@@ -6,8 +6,8 @@
 from sklearn.metrics import r2_score
 
 from aeon.datasets import load_covid_3month
+from aeon.regression._dummy import DummyRegressor
 from aeon.regression.base import BaseRegressor
-from aeon.regression.dummy import DummyRegressor
 from aeon.testing.testing_data import (
     EQUAL_LENGTH_UNIVARIATE_REGRESSION,
     UNEQUAL_LENGTH_UNIVARIATE_REGRESSION,