Update app.py

app.py

@@ -77,8 +77,7 @@ def respond1(
             yield response
 def respond0(multimodal_input,password):
     if password==password1:
-        if multimodal_input["files"] not None:
-        
+        if multimodal_input["files"] =! None:
             images = multimodal_input["files"]
             content = [{"type": "image"} for _ in images]
             content.append({"type": "text", "text": multimodal_input["text"]})