split subter implementation (training + inference)

tools/util.py

@@ -1,11 +1,11 @@
-from pointcloudset import Dataset
-from pointcloudset.io.dataset.ros import dataset_from_ros
-from pathlib import Path
 from argparse import ArgumentTypeError
-from subprocess import run
 from datetime import timedelta
-from matplotlib.colors import Colormap
+from pathlib import Path
+from subprocess import run
+
 from matplotlib import colormaps
+from matplotlib.colors import Colormap
+from pointcloudset import Dataset
 
 
 def load_dataset(