Update app.py

app.py

@@ -4,7 +4,7 @@ import pandas as pd
 # Load dataframe
 file = st.file_uploader('Seleccione un archivo Excel: ')
 
-if uploaded_file is not None:
+if file is not None:
     # Load the Excel file into a Pandas dataframe
     df = pd.read_excel(file, engine='openpyxl', type="xlsx")
     # Show the dataframe in Streamlit