Update app.py

app.py

@@ -1,6 +1,7 @@
 import tensorflow as tf
 import gradio as gr
 import cv2
+import os
 
 used_model = tf.keras.layers.TFSMLayer(os.path.dirname('/model'), call_endpoint='serving_default')
 new_classes = ['blight', 'common_rust', 'gray_leaf_spot','healthy']