need to import from ppsurf subdir

app.py

@@ -61,10 +61,10 @@ def main():
     def convert_to_ply(input_point_cloud_upload: gr.utils.NamedString):
 
         # add absolute path to import dirs
-        # import sys
-        # import os
-        # sys.path.append(os.path.abspath('ppsurf'))
-        #
+        import sys
+        import os
+        sys.path.append(os.path.abspath('ppsurf'))
+
         # import os
         # os.chdir('ppsurf')