class_docstr: Heatmap Focal Loss layer
class_docstr_tok: ["Heatmap","Focal","Loss","layer"]
code: def __init__(self, alpha, beta):
      super(HMFocalLoss, self).__init__()
      self.alpha = alpha
      self.beta = beta
  
file_path: gluon-cv/gluoncv/torch/nn/keypoint_loss.py
imports: import torch
  import torch.nn
label_desc: Use image node_id 1 to create a new HMFocalLoss object from inherited base classes: nn with example: obj = HMFocalLoss(alpha, beta)