Up my solution

sklearn_questions.py

@@ -64,12 +64,12 @@
 
 def most_common_label(array):
     """Return the most common label in the array.
+
     Args:
         array : the array of labels
     Returns:
         most_common : the most common label in the array
     """
-
     counter = Counter(array)
     most_common = counter.most_common(1)
     # If there is a tie for the most common label, this will return the first \
@@ -241,8 +241,7 @@ def split(self, X, y, groups=None):
 
 
 def main():
-    """Main function to test the classes.
-    """    
+    """Test the different classes."""
     # Create a DataFrame with a datetime column
     date_range = pd.date_range(start='1/1/2020', end='1/1/2022', freq='D')
     df = pd.DataFrame({