Update app.py

app.py

@@ -59,9 +59,10 @@ if uploaded_files:
             
     st.markdown("Data transform")
     
-    st.dataframe(dataframes)
-    columns = st.selectbox("Select  column", dataframes.columns)
-    old_values = st.multiselect("Current Values",list(dataframes[columns].unique()),list(dataframes[columns].unique()))
+    for i, df in enumerate(dataframes):
+    st.dataframe(df)
+    columns = st.selectbox("Select  column", df.columns)
+    old_values = st.multiselect("Current Values",list(df[columns].unique()),list(df[columns].unique()))