standalone val (#56)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

ultralytics/yolo/utils/modeling/autobackend.py

@@ -304,7 +304,7 @@ class AutoBackend(nn.Module):
     def _model_type(p='path/to/model.pt'):
         # Return model type from model path, i.e. path='path/to/model.onnx' -> type=onnx
         # types = [pt, jit, onnx, xml, engine, coreml, saved_model, pb, tflite, edgetpu, tfjs, paddle]
-        from export import export_formats
+        from ultralytics.yolo.engine.exporter import export_formats
         sf = list(export_formats().Suffix)  # export suffixes
         if not is_url(p, check=False):
             check_suffix(p, sf)  # checks