Code Refactor ruff check --fix --extend-select I (#13093)

* Refactor code for speed and clarity

* Auto-format by https://ultralytics.com/actions

* Update train.py

Signed-off-by: Glenn Jocher <glenn.jocher@ultralytics.com>

* Update README.md

Signed-off-by: Glenn Jocher <glenn.jocher@ultralytics.com>

---------

Signed-off-by: Glenn Jocher <glenn.jocher@ultralytics.com>
Co-authored-by: UltralyticsAssistant <web@ultralytics.com>
Co-authored-by: Ultralytics Assistant <135830346+UltralyticsAssistant@users.noreply.github.com>

models/yolo.py

@@ -244,7 +244,10 @@ class DetectionModel(BaseModel):
         if isinstance(m, (Detect, Segment)):
             s = 256  # 2x min stride
             m.inplace = self.inplace
-            forward = lambda x: self.forward(x)[0] if isinstance(m, Segment) else self.forward(x)
+
+            def forward(x):
+                return self.forward(x)[0] if isinstance(m, Segment) else self.forward(x)
+
             m.stride = torch.tensor([s / x.shape[-2] for x in forward(torch.zeros(1, ch, s, s))])  # forward
             check_anchor_order(m)
             m.anchors /= m.stride.view(-1, 1, 1)