ultralytics 8.0.81 single-line docstring updates (#2061)

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

ultralytics/yolo/utils/tal.py

@@ -69,6 +69,7 @@ class TaskAlignedAssigner(nn.Module):
     """
 
     def __init__(self, topk=13, num_classes=80, alpha=1.0, beta=6.0, eps=1e-9):
+        """Initialize a TaskAlignedAssigner object with customizable hyperparameters."""
         super().__init__()
         self.topk = topk
         self.num_classes = num_classes
@@ -137,6 +138,7 @@ class TaskAlignedAssigner(nn.Module):
         return mask_pos, align_metric, overlaps
 
     def get_box_metrics(self, pd_scores, pd_bboxes, gt_labels, gt_bboxes, mask_gt):
+        """Compute alignment metric given predicted and ground truth bounding boxes."""
         na = pd_bboxes.shape[-2]
         mask_gt = mask_gt.bool()  # b, max_num_obj, h*w
         overlaps = torch.zeros([self.bs, self.n_max_boxes, na], dtype=pd_bboxes.dtype, device=pd_bboxes.device)