ultralytics 8.1.44 add IS_RASPBERRYPI and constants refactor (#9827)

Signed-off-by: Glenn Jocher <glenn.jocher@ultralytics.com>
Co-authored-by: UltralyticsAssistant <web@ultralytics.com>

ultralytics/engine/model.py

@@ -321,9 +321,10 @@ class Model(nn.Module):
             AssertionError: If the model is not a PyTorch model.
         """
         self._check_is_pytorch_model()
-        from ultralytics import __version__
         from datetime import datetime
 
+        from ultralytics import __version__
+
         updates = {
             "date": datetime.now().isoformat(),
             "version": __version__,