bi pdZddlmZddlZddlmZd dej dedeedejfdZ y) ad This module is intended to store mask functions for use inside SHiRA construction. The mask functions are required to have a specific signature as shown below. Required positional arguments: base_layer - This is the linear layer where the shira adapter will be attached. r - This parameter is used to determine the number of parameters in the shira adapter in a way that is consistent with LoRA sizing. SHiRA is a high rank adapter. Setting this parameter does not restrict the adapter rank. Keyword arguments can be provided as needed by the particular mask function implementation. Return: mask - this is a torch.tensor of the same shape as base_layer.weight that contains 0s and 1s with the same dtype and device as base_layer.weight If you would like to attach SHiRA adapters to a model using PEFT methods (such as get_peft_model()), using more arguments than the provided positional arguments, you can create the mask function reference like the following: ``` def create_mask_function_reference(**my_kwargs): def mask_fn(base_layer, r): ... your implementation here that might use my_kwargs ... return mask return mask_fn ``` Then, you can create your peft model with custom SHiRA mask as follows: ``` model = ... my_kwargs = ... mask_fn = create_mask_function_reference(**my_kwargs) peft_config = ShiraConfig(r=4, mask_type='my_custom_mask') peft_config.mask_fn = mask_fn peft_model = get_peft_model(model, peft_config) ``` Complete training examples are provided in the examples/shira/ directory. )OptionalN base_layerr random_seedreturnc |jj}||d|dzz}tj}||j |tj |jj |d|j|jj}tj|j|jj}tj|jjdd} | jd|jd|jdj|} | S)Nr) generator)weightshapetorch Generator manual_seedrandpermnumeltodevice ones_liketypedtype zeros_likeviewscatter_ unsqueeze) rrrkwargsr num_shira_weightsrandom_generatoridxvalmasks [/home/cdr/jupyterlab/.venv/lib/python3.12/site-packages/peft/tuners/shira/mask_functions.py random_maskr#;s     # #EU1Xa01($$[1 >>*++113?O PQcRc d h h   C //#((:#4#4#:#:; ? D DU KD K)N) __doc__typingrrtorch.nnnnModuleinttensorr#r$r"r-sF$L  BII # HSM _d_k_k r$