Update app.py

app.py

@@ -1626,9 +1626,9 @@ if __name__=='__main__':
     Single prediction: predict a compound under a given condition including eluent, flow rate and column type\n
     Column recommendation: give the separation probability of two molecules (especially enantiomers) under all column types\n
     """
-    demo_3 = gr.Blocks()
+    demo_mark = gr.Blocks()
 
-    with demo_3:
+    with demo_mark:
         gr.Markdown('''
                     <div>
                     <h1 style='text-align: center'>Chromatographic enantioseparation prediction</h1>
@@ -1644,7 +1644,7 @@ if __name__=='__main__':
                                                           info="Choose a HPLC column")], outputs=['text'])
     demo_2=gr.Interface(fn=column_recommendation, inputs=["text", "text", "number", "number"],
                                        outputs=['dataframe'])
-    demo=gr.TabbedInterface([demo_1, demo_2,demo_3], ["Single prediction", "Column recommendation","Markdown"])
+    demo=gr.TabbedInterface([demo_mark,demo_1, demo_2], ["Markdown","Single prediction", "Column recommendation"])
     demo.launch()