Update app.py

app.py

@@ -41,8 +41,21 @@ with gr.Blocks() as bm25:
 
             #german = gr.Textbox(label="German Text")
             def confirmation():
-                doc='File uploaded! Press Cluster button'
-                return doc
+                if file.name.endswith('.csv'):
+                    df = pd.read_csv(file)
+                elif file.name.endswith('.xls') or file.name.endswith('.xlsx'):
+                    df = pd.read_excel(file)
+                else:
+                    doc = "Unsupported file format. Please provide a CSV or Excel file."
+                    return doc  # Return immediately with the error message
+            
+                # Ensure that the 'products' column is present in the dataframe
+                if 'products' not in df.columns.str.lower():
+                    doc = "The input file must have a column named 'products'."
+                    return doc  # Return immediately with the error message
+            
+                doc = 'File uploaded! Press Cluster button'
+                return doc  # Return the success message
 
             def download_doc(doc):
                 return doc