Update app.py

app.py

@@ -139,10 +139,10 @@ def main():
     if uploaded_file is not None:
         try:
             # Read the Excel file into a DataFrame
-            df = pd.read_excel(uploaded_file)
-            
-            # Rename duplicate columns
-            df = df.rename(columns=lambda x: x if not df.columns.duplicated()[list(df.columns).index(x)] else f"{x}_{list(df.columns[:list(df.columns).index(x)]).count(x)+1}")
+            # df = pd.read_excel(uploaded_file)
+
+            # Read the Excel file into a DataFrame and handle duplicate columns automatically
+            df = pd.read_excel(uploaded_file, mangle_dupe_cols=True)
 
             # Replace student names with initials
             df = replace_student_names_with_initials(df)