Update app.py

app.py

@@ -103,9 +103,9 @@ def new_line(n=1):
 st.cache_data()
 def load_data(upd_file):
     # Read CSV or Excel file
-    if file.name.endswith('.csv'):
+    if upd_file.name.endswith('.csv'):
         return pd.read_csv(file)
-    elif file.name.endswith('.xlsx') or file.name.endswith('.xls'):
+    elif upd_file.name.endswith('.xlsx') or file.name.endswith('.xls'):
         return pd.read_excel(file)
     else:
         raise ValueError("Unsupported file format. Only CSV and Excel files are supported.")