Update app.py

app.py

@@ -183,11 +183,13 @@ def main():
                 show_download_links(subdir)
 
         # Expander for showing URL history and download links
-        with st.expander("URL History and Downloaded Files"):
-            for url, subdir in history.items():
-                st.markdown(f"#### {url}")
-                show_download_links(subdir)
-
+        with st.expander("URL History and Downloaded Files
+            try:
+                for url, subdir in history.items():
+                    st.markdown(f"#### {url}")
+                    show_download_links(subdir)
+            except:
+                print('url history is empty')
         # Update each time to show files we have
         for subdir in history.values():
             show_download_links(subdir)