Update app.py

app.py

@@ -25,7 +25,11 @@ def classify(image):
 
 def image2speech(image):
     print("tts \n")
-    txt = classify(image)
+    try:
+        txt = classify(image)
+    except:
+        txt = "No object detected"
+
     return fastspeech(txt), txt
     
 print("load tts interface \n")