Update app.py

app.py

@@ -29,6 +29,11 @@ class_names = ['cloudy', 'desert', 'green_area', 'water']
 
 def predict_image(file_path):
 
+    if file_path is None:
+
+        return "Please upload a satellite image for prediction"
+    
+
     with open(file_path, "rb") as f:
 
         imageUploadedByUser = Image.open(f)