Add missing Python function docstrings (#2227)

* Add missing Python function docstrings

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

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Co-authored-by: UltralyticsAssistant <web@ultralytics.com>

models/yolo.py

@@ -223,6 +223,7 @@ def __init__(self, cfg="yolov5s.yaml", ch=3, nc=None, anchors=None):  # model, i
             m.inplace = self.inplace
 
             def forward(x):
+                """Passes the input 'x' through the model and returns the processed output."""
                 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

utils/dataloaders.py

@@ -1209,7 +1209,7 @@ def get_json(self, save=False, verbose=False):
         """
 
         def _round(labels):
-            # Update labels to integer class and 6 decimal place floats
+            """Update labels to integer class and 6 decimal place floats."""
             return [[int(c), *(round(x, 4) for x in points)] for c, *points in labels]
 
         for split in "train", "val", "test":

utils/loggers/__init__.py

@@ -22,6 +22,9 @@
 except ImportError:
 
     def SummaryWriter(*args):
+        """Imports TensorBoard's SummaryWriter for logging, with a fallback returning None if TensorBoard is not
+        installed.
+        """
         return None  # None = SummaryWriter(str)