code: def master2model(model_params:Sequence[Tensor], master_params:Sequence[Tensor], flat_master:bool=False)->None:
      "Copy `master_params` to `model_params`."
      if flat_master:
          for model_group,master_group in zip(model_params,master_params):
              if len(model_group) != 0:
                  for model, master in zip(model_group, _unflatten_dense_tensors(master_group[0].data, model_group)):
                      model.data.copy_(master)
      else:
          for model_group,master_group in zip(model_params,master_params):
              for model, master in zip(model_group, master_group): model.data.copy_(master.dataf master2model(model_params:Sequence[Tensor], master_params:Sequence[Tensor], flat_master:bool=False)->None:
      "Copy `master_params` to `model_params`."
      if flat_master:
          for model_group,master_group in zip(model_params,master_params):
              if len(model_group) != 0:
                  for model, master in zip(model_group, _unflatten_dense_tensors(master_group[0].data, model_group)):
                      model.data.copy_(master)
      else:
          for model_group,master_group in zip(model_params,master_params):
              for model, master in zip(model_group, master_group): model.data.copy_(master.data)
docs: Copy `master_params` to `model_params`.