Update app.py

app.py

@@ -1,3 +1,8 @@
+import gradio as gr
+import joblib
+import numpy as np
+import os
+
 MODEL_PATH = os.getenv("MODEL_PATH", "baseline_pipe.pkl")
 
 baseline = None
@@ -25,4 +30,4 @@ demo = gr.Interface(
 )
 
 if __name__ == "__main__":
-    demo.launch()
+    demo.launch()