docstr: Initialize model weights.
docstr_tok: ["Initialize","model","weights","."]
code: def init_weights(self):
      """Initialize model weights."""
      if not isinstance(self.deconv_layers, nn.Identity):
          for m in self.deconv_layers:
              if isinstance(m, nn.BatchNorm2D):
                  ones_(m.weight)
                  ones_(m.bias)
      if not isinstance(self.final_layer, nn.Conv2D):
          for m in self.final_layer:
              if isinstance(m, nn.Conv2D):
                  normal_(m.weight)
                  zeros_(m.bias)
              elif isinstance(m, nn.BatchNorm2D):
                  ones_(m.weight)
                  ones_(m.bias)
      else:
          normal_(self.final_layer.weight)
          zeros_(self.final_layer.bias)
  
file_path: PaddleDetection/ppdet/modeling/heads/vitpose_head.py
imports: import paddle
  import paddle.nn
  import paddle.nn.functional
  from ppdet.core.workspace import register
  from ppdet.modeling.keypoint_utils import resize, flip_back
  from paddle.nn.initializer import TruncatedNormal, Constant, Normal
  from ppdet.modeling.layers import ConvTranspose2d, BatchNorm2d
label_desc: Use image node_id 8 for calling the TopdownHeatmapSimpleHead obj's underlying member method code with example usage: obj.init_weights() without return types