Correct button and tab functionality

app.py

@@ -56,18 +56,19 @@ if uploaded_file_paths is not None:
         else:
             if uploaded_file not in valid_files:
                 valid_files.append(uploaded_file)
-    audio_tabs = st.tabs([f.name for f in valid_files])
+    if len(valid_files) > 0:
+        audio_tabs = st.tabs([f.name for f in valid_files])
 
-for tab in audio_tabs:
-    if tab.button("Analyze Audio"):
+for j, tab in enumerate(audio_tabs):
+    if tab.button("Analyze Audio",key=f"button_{j}"):
         if uploaded_file is None:
             tab.error('Upload a file first!')
         else:
             # Process
             # Pretend to take time as an example
-            with tab.spinner(text='NOT ACTUALLY ANALYZING, JUST A FILLER ANIMATION'):
+            with st.spinner(text='NOT ACTUALLY ANALYZING, JUST A FILLER ANIMATION'):
                 time.sleep(5)
-                tab.success('Done')
+                st.success('Done')
                 
             # RTTM load as filler
             speakerList, annotations = su.loadAudioRTTM("24F CHEM1402 Night Class Week 4.rttm")