feat: added column unique function

src/Dataset.py

@@ -117,6 +117,21 @@ class Dataset:
             pd.Series: The sorted column.
         """
         return self.dataframe[colname].sort_values(ascending=ascending)
+    
+    
+    def get_unique_column_values(
+            self, colname: str):
+        """Returns a count of categorical values in the dataset.
+
+        Args:
+            colname (str): the column name.
+
+        Returns:
+            string array: an array of strings containing the unique values
+            present in the column
+        """
+        return self.dataframe[colname].explode().unique()
+
 
     def get_category_counts(
         self, colname: str, ascending: bool = None