Update subgen.py

subgen/subgen.py

@@ -615,8 +615,9 @@ def path_mapping(fullpath):
         return fullpath.replace(path_mapping_from, path_mapping_to)
     return fullpath
 
-# Define a handler class that will process new files
-class NewFileHandler(FileSystemEventHandler):
+if monitor:
+    # Define a handler class that will process new files
+    class NewFileHandler(FileSystemEventHandler):
         def on_created(self, event):
             # Only process if it's a file
             if not event.is_directory: