isort --profile black . (#2181)

* updating DIRECTORY.md

* isort --profile black .

* Black after

* updating DIRECTORY.md

Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>

machine_learning/random_forest_regressor.py

@@ -1,10 +1,8 @@
 # Random Forest Regressor Example
-
 from sklearn.datasets import load_boston
-from sklearn.model_selection import train_test_split
 from sklearn.ensemble import RandomForestRegressor
-from sklearn.metrics import mean_absolute_error
-from sklearn.metrics import mean_squared_error
+from sklearn.metrics import mean_absolute_error, mean_squared_error
+from sklearn.model_selection import train_test_split
 
 
 def main():