Remove unused imports

app/etl/extract.py

@@ -1,7 +1,6 @@
 import pandas as pd
 import os
 # TODO (Find & Fix)
-from typing import Optional
 
 def extract(path: str = "xyz.csv") -> pd.DataFrame :
     """
@@ -54,3 +53,5 @@ def extract(path: str = "xyz.csv") -> pd.DataFrame :
         raise ValueError("❌ File contains no data")
     except pd.errors.ParserError as e:
         raise ValueError(f"❌ Error parsing CSV: {e}")
+    except Exception as e:
+        raise ValueError(f"❌ Unexpected error reading file: {e}")

app/etl/load.py

@@ -2,7 +2,6 @@
 import sqlite3
 import os
 # TODO (Find & Fix)
-from typing import Optional
 
 def load(df: pd.DataFrame, db_path: str = "etl_data.db", table_name: str = "processed_data"):
     """
@@ -68,4 +67,4 @@ def load(df: pd.DataFrame, db_path: str = "etl_data.db", table_name: str = "proc
             conn.rollback() 
     finally:
         if conn:
-            conn.close()
+            conn.close()

app/etl/transform.py

@@ -1,7 +1,5 @@
 import pandas as pd
-from datetime import datetime
 # TODO (Find & Fix)
-from typing import Optional
 
 def transform(df: pd.DataFrame) -> pd.DataFrame:
     """
@@ -51,4 +49,4 @@ def transform(df: pd.DataFrame) -> pd.DataFrame:
         pass
 
     # TODO (Find & Fix): Text columns are not cleaned (strip, lowercase)
-    return df_transformed
+    return df_transformed