class_docstr: ## Zero3 Layer
  
  Each layer of the model (or a combination of a few consecutive layers) should be wrapped in
  this module.
class_docstr_tok: ["#","#","Zero3","Layer","Each","layer","of","the","model","(","or","a","combination","of","a","few","consecutive","layers",")","should","be","wrapped","in","this","module","."]
docstr: #### Parameter backward hook
docstr_tok: ["#","#","#","#","Parameter","backward","hook"]
code: def _post_backward_hook(self, p: nn.Parameter, *args):
      """
      #### Parameter backward hook
      """
      # Remove the handle from the parameter
      p._hook_handle.remove()  # type: ignore[attr-defined]
      delattr(p, "_hook_handle")
  
      # Handle a backward event
      self._backward_event()
  
imports: import functools
  from typing import List, Optional, Tuple
  import torch
  import torch.distributed
  from torch import nn
label_desc: Use image node_id 10 for calling the Zero3Layer obj's underlying member method code with example usage: obj._post_backward_hook(p) without return types