diff --git a/quinn/transformations.py b/quinn/transformations.py
index 31f59212..7c5c7803 100644
--- a/quinn/transformations.py
+++ b/quinn/transformations.py
@@ -1,6 +1,6 @@
+from __future__ import annotations
 import re
 import pyspark.sql.functions as F  # noqa: N812
-from __future__ import annotations
 from collections.abc import Callable
 from pyspark.sql import DataFrame
 from pyspark.sql.types import ArrayType, MapType, StructField, StructType
@@ -100,7 +100,7 @@ def sort_columns(
     :return: A DataFrame with the columns sorted in the chosen order
     :rtype: pyspark.sql.DataFrame
     """
-    
+
     def sort_nested_cols(schema, is_reversed, base_field="") -> list[str]:
         # recursively check nested fields and sort them
         # https://stackoverflow.com/questions/57821538/how-to-sort-columns-of-nested-structs-alphabetically-in-pyspark
@@ -282,6 +282,7 @@ def flatten_map(df: DataFrame, col_name: str, separator: str = ":") -> DataFrame
         [F.col(f"`{col}`") for col in df.columns if col != col_name] + key_cols,
     )
 
+
 def flatten_dataframe(
     df: DataFrame,
     separator: str = ":",
@@ -331,6 +332,7 @@ def flatten_dataframe(
         >>> flattened_df_with_hyphen = flatten_dataframe(df, replace_char="-")
         >>> flattened_df_with_hyphen.show()
     """
+
     def sanitize_column_name(name: str, rc: str = "_") -> str:
         """Sanitizes column names by replacing special characters with the specified character.
 
@@ -353,7 +355,9 @@ def explode_array(df: DataFrame, col_name: str) -> DataFrame:
         :return: The DataFrame with the exploded ArrayType column.
         :rtype: DataFrame
         """
-        return df.select("*", F.explode_outer(F.col(f"`{col_name}`")).alias(col_name)).drop(
+        return df.select(
+            "*", F.explode_outer(F.col(f"`{col_name}`")).alias(col_name)
+        ).drop(
             col_name,
         )
 
@@ -380,4 +384,4 @@ def explode_array(df: DataFrame, col_name: str) -> DataFrame:
         ]
         df = df.toDF(*sanitized_columns)  # noqa: PD901
 
-    return df
\ No newline at end of file
+    return df