Update app.py

app.py

@@ -5,10 +5,13 @@ import pandas as pd
 file = st.file_uploader('Seleccione un archivo CSV: ')
 df = pd.read_csv(file)
 
-if file is None:
-    pass
-else:
+if uploaded_file is not None:
+    # Load the Excel file into a Pandas dataframe
+    df = pd.read_excel(uploaded_file, engine='openpyxl', type="xlsx")
+    
+    # Show the dataframe in Streamlit
     st.write(df.head())
+    st.write(df.columns)
 
     # Sidebar option
     option = st.sidebar.selectbox('Clasificar resultados por:', ('Pregunta', 'Categoria'))