Update app.py

app.py

@@ -1,8 +1,12 @@
 import gradio as gr
+from model import GPT2PPL
 
+# initialize the model
+model = GPT2PPL()
 
-def greet(name):
-    return "Hello " + name
+
+def greet(sentence):
+    return model(sentence)
 
 
 demo = gr.Interface(fn=greet, inputs="text", outputs="text")