error handling

app.py

@@ -1,12 +1,17 @@
+import sys
+
 import gradio as gr
 
 import list_repos
 import refresh_lists
 
 def greet(name):
-    refresh_repos()
-    refresh_files()
-    return "Hello " + name + "!!"
+    try:
+        refresh_repos()
+        refresh_files()
+        return "Hello " + name + "!!"
+    except:
+        raise gr.Error(str(sys.exc_info()))
 
 def refresh_repos(progress=gr.Progress(track_tqdm=True)):
     list_repos.write_repos_to_db()