from collections import OrderedDict from multiprocessing.sharedctypes import Value import os from opendelta.delta_configs import BaseDeltaConfig from opendelta.utils.model_md5 import gen_model_hash from opendelta.utils.signature import get_arg_names, signature from typing import Optional, Union from opendelta.utils.cuda import get_device from opendelta.utils.name_based_addressing import * import torch.nn as nn import torch from functools import wraps # from decorator import decorate from opendelta.utils.decorate import decorate from opendelta.utils.structure_mapping import transform from transformers.file_utils import PushToHubMixin from transformers.deepspeed import deepspeed_config, is_deepspeed_zero3_enabled from opendelta import SaveLoadMixin from opendelta import logging from opendelta.utils.structure_mapping import CommonStructureMap from opendelta.utils.interactive.web import interactive from opendelta.utils.data_parallel import new_replicate_for_data_parallel logger = logging.get_logger(__name__) def is_leaf_module(module): r"""Whether the module is a leaf module """ try: return len([n for n,_ in module.named_children()]) == 0 except: from IPython import embed embed() def non_module_param(module: nn.Module): module_names = [n for n, _ in module.named_modules()] ret = [] for n, p in module.named_parameters(): if not is_child_key(n, module_names): ret.append((n,p)) return ret class DeltaBase(nn.Module, SaveLoadMixin): r"""This is the base class for all delta models. It provides four simple but effective functionalities for building the delta model: #. addressing a module inside the backbone model using a minimal description key. #. provide the interface for modifying and inserting model which keeps the docs/IO the same as the module before modification. #. pass a pseudo input to determine the inter dimension of the delta models. #. freeze a part of model parameters according to key. It also provides unified interface for model loading and saving. Class attributes (overridden by derived classes): - delta_type (:obj:`str`): the name of the delta modules, used to create the correct :class:`opendelta.AutoDeltaModel`. - config_class (:class:`BaseDeltaConfig`): The corresponding config model Args: backbone_model (:obj:`nn.Module`, *required*): backbone model that the delta models are build opon. The modification to the backbone model are in place. modified_modules (:obj:`List[str]`, *optional*, default to :obj:`None`): The modules are subjected to update. .. note:: leave this argument :obj:`None` will make the delta model return to the default setting, which add the delta models to the position experimented the paper. In this setting, the common structure mapping is loaded to addressing the corresponding modules. registraction_name (:obj:`str`, *optional*, default to ``"deltas"``): The root name of the delta models when attached to the backbone model. common_structure (:obj:`bool`, *optional*, default to :obj:`None`): Whether use the common structure mapping to specify the modified_modules. i.e., if common_structure=True, then we use a common ["attn"] for attention module in different models. We DO NOT recommend manually set ``common_structure`` to ``true`` by yourself unless you are using delta among multiple backbones and don't want to modify the code. interactive_modify (:obj:`bool` or :obj:`int`, *optional*, default to :obj:`None`): Whether to use interactive modification. By setting to :obj:`int` can specify the port of web server. """ delta_type = "" default_modified_modules = [] config_class = BaseDeltaConfig default_unfrozen_modules = ["deltas"] def __init__(self, backbone_model: nn.Module, modified_modules: Optional[List[str]] = None, unfrozen_modules: Optional[List[str]] = None, interactive_modify: Optional[Union[bool, int]] = False, common_structure = False, ): nn.Module.__init__(self) # register the backbone model after init using self.__dict__ method to avoid adding backbone_model # to the modules of the delta model. self.__dict__["backbone_model"] = backbone_model if modified_modules is None: if interactive_modify: if isinstance(interactive_modify, bool) and interactive_modify==True: self.modified_modules = interactive(backbone_model) else: self.modified_modules = interactive(backbone_model, port=interactive_modify) self.common_structure = False else: self.modified_modules = self.default_modified_modules self.common_structure = True else: if interactive_modify: raise ValueError("Use modified_modules and interactive_modify at the same time is not supported") self.modified_modules = modified_modules self.common_structure = common_structure if self.common_structure: self.structure_mapping = CommonStructureMap.load(self.backbone_model) else: self.structure_mapping = None if unfrozen_modules is None: self.unfrozen_modules = self.default_unfrozen_modules if self.common_structure and self.structure_mapping is None: raise RuntimeError("Using common structure but the structure mapping is None") def forward(self, *args, **kwargs) -> "RuntimeError": r""" .. warning:: Removed method. As the model is a delta model, which should be attached to a backbone model \ and can't forward any data by itself. Please using the backbone model's forward function \ after attach the delta model to the backbone. """ raise RuntimeError("This is a delta model, which should be attached to a backbone model \ and can't forward any data by itself. Please using the backbone model's forward function \ after attach the delta model to the backbone. ") @classmethod def from_config(cls, config: Union[BaseDeltaConfig, dict], backbone_model: nn.Module, check_hash=True, **kwargs): r"""Initialize a delta model from a config object or a dict containing the configs. To temperarily change a value in the config, pass it through kwargs. If the config has a backbone model's hash, which means it is a finetuned delta model's config, then we will compare the hash in the config and the newly caculated to ensure the finedtuned delta model is trained on the passed backbone_model. Pass ``check_hash=False`` to disable the checking. Args: config (:obj:`BaseDeltaConfig` or :obj:`dict`) A config object or a dict that contains the necessary value to initialize the delta model. backbone_model (:obj:`nn.Module`) A pytorch module that will be pass into the delta model as the backbone model. modifications will be made in place in the backbone model. check_hash (:obj:`bool`, default to ``True``) Whether to check hash of the backbone model and the config's backbone hash. kwargs: Any configurations that are passed to update the config object. #TODO unit test needed. """ supported_keys = get_arg_names(cls.__init__) + get_arg_names(DeltaBase.__init__) config_dict = config.to_dict() for key in list(config_dict.keys()): if key not in supported_keys: config_dict.pop(key) return cls(backbone_model, **config_dict) def add_all_delta_to_backbone(self, backbone: nn.Module, modified_modules: List[str], ) -> nn.Module: r"""The main function to add delta models to the backbone model based on the :obj:`modified_modules`. Args: backbone_model (:obj:`nn.Module`, *required*) backbone model that the delta models are build opon. The modification to the backbone model are in place. modified_modules (:obj:`List[str]`, *optional*, default to :obj:`None`) The modules are subjected to update. leave this argument :obj:`None` will make the delta model return to the default setting, which add the delta models to the position experimented the paper. In this setting, the common structure mapping is loaded to addressing the corresponding modules. Returns: :obj:`nn.Module` The modified backbone model. """ self.plm_total_params = sum(p.numel() for p in backbone.parameters()) # create a new key list to avoid recursion. backbone_key_list = [key for key, _ in backbone.named_modules()] for key in backbone_key_list: if self.find_key(key, modified_modules): #TODO may have bugs when commonstructure has a virtual node and it's refered logger.debug("find key: {}".format(key)) self.update_module(backbone, key) self._pseudo_data_to_instantiate(backbone) # mark the paratmers that are the delta parameters for easily displaying the delta_paramters. self.mark_as_delta() return backbone def mark_as_delta(self, module: nn.Module=None,): r"""[NODOC] Mark :obj:`module`'s all parameters as delta parameters by setting a ``_is_delta`` attribute to each of them. Generally, it is used after creating the delta modules. By leaving module to :obj:`None`, it will mark all the parameters in the delta model as ``_is_delta``. Args: module (:obj:`nn.Module`): The module to mark as delta. """ if module is None: module=self # all the parameters in the delta model. for p in module.parameters(): setattr(p, "_is_delta", True) def update_module(self, module: nn.Module, key: str): r"""Update a module specified by :obj:`key`. The method is reimplemented in each specific delta model. """ raise NotImplementedError def freeze_module(self, module: Optional[nn.Module] = None, exclude: Optional[List[str]] = None, set_state_dict: Optional[bool]=True, ): r"""Freeze the parameters of plm. Leave the parameters in exclude untouched. deltas module is filtered with ``_is_delta`` attributes because it may have parameter sharing to the main model, (e.g., bias term) Args: module (:obj:`nn.Module`, *optional*, default to :obj:`None`): The module of which some parts are frozen. If left with :obj:`None`, the function will the self.backbone_model as the module to be frozen. exclude (:obj:`List[str]`, *optional*, default to ``["deltas"]``): The parameters that don't need to be freezed. Default to all the delta parameters. set_state_dict (:obj:`bool`, *optional*, default to :obj:`True`): Whether setting the backbone model's state dict to all the parameters that still need grad. prefix (:obj:`str`, *optional*, default to ``""``): A parameters that are used for recursive frozen. Should not be changed by passing argument other than ``""``. """ if exclude is None: exclude = self.unfrozen_modules if module is None: module = self.backbone_model self._freeze_module_recursive(module, exclude, "") # modify the active state dict that still need grad if set_state_dict: self.set_active_state_dict(module) def _freeze_module_recursive(self, module: Optional[nn.Module] = None, exclude: Optional[List[str]] = None, prefix=""): r"""[NODOC] Freeze the parameters of plm. Leave the parameters in exclude untouched. deltas module is filtered with ``_is_delta`` attributes because it may have parameter sharing to the main model, (e.g., bias term) Args: module (:obj:`nn.Module`, *optional*, default to :obj:`None`): The module of which some parts are frozen. If left with :obj:`None`, the function will the self.backbone_model as the module to be frozen. exclude (:obj:`List[str]`, *optional*, default to ``["deltas"]``): The parameters that don't need to be freezed. Default to all the delta parameters. set_state_dict (:obj:`bool`, *optional*, default to :obj:`True`): Whether setting the backbone model's state dict to all the parameters that still need grad. prefix (:obj:`str`, *optional*, default to ``""``): A parameters that are used for recursive frozen. Should not be changed by passing argument other than ``""``. """ if is_leaf_module(module): for n, p in module.named_parameters(): if self.find_key(".".join([prefix,n]), exclude): continue if "deltas" not in exclude or (not (hasattr(p, "_is_delta") and getattr(p, "_is_delta"))): p.requires_grad = False return else: for n, c in module.named_children(): if self.find_key(".".join([prefix,n]), exclude): # if found, untouch the parameters continue else: # firstly freeze the non module params, then go deeper. params = non_module_param(module) for n, p in params: if "deltas" not in exclude or (not (hasattr(p, "_is_delta") and getattr(p, "_is_delta"))): p.requires_grad = False self._freeze_module_recursive(c, exclude=exclude, prefix=".".join([prefix,n]) ) def find_key(self, key: str, target_list: List[str]): r"""Check whether any target string is in the key or in the tail of the key, i.e., Args: key (:obj:`str`): The key (name) of a submodule in a ancestor module. E.g., model.encoder.layer.0.attention target_list (List[Union[:obj:`str`, :obj:`re.Pattern`]]): The target list that we try to match ``key`` with. E.g., ["attention"] Returns: :obj:`bool` True if the key matchs the target list. """ if self.common_structure: key = self.structure_mapping.transform(key, strict=False) if not key: return False try: return endswith_in(key, target_list) except: from IPython import embed embed(header = "find_key exception") def _pseudo_data_to_instantiate(self, module: Optional[nn.Module]=None): r"""Create a pseudo_data into the module to know the dimemsion of each tensor in the computation graph. First try to use the dummy_inputs of the pretrained model. If the model has no dummy_inputs, will try to create integer tensor as the pseudo_input, if ``decoder_input_ids`` is in the model's forward function, additional create it. Args: module (:obj:`nn.Module`, *optional*, default to :obj:`None`): The backbone model. """ if module is None: module = self.backbone_model try: dummy_inputs = module.dummy_inputs module(**dummy_inputs) except AttributeError: device = get_device(module) logger.warning("No dummy_inputs attributes, create a common input_ids for input.") pseudo_input = torch.tensor([[0,0]]).to(device) if "decoder_input_ids" in signature(module.forward).args: module(pseudo_input, decoder_input_ids = pseudo_input) else: module(pseudo_input) def trainable_parameters_names(self, module: Optional[nn.Module]=None): r"""[NODOC] A small sugar function to return all the trainable parameter's name in the (by default, backbone) model. Args: module (:obj:`nn.Module`): of which module we want to know the trainable paramemters' name. Returns: :obj:`List[str]` """ if module is None: module = self.backbone_model return [n for n,p in module.named_parameters() if p.requires_grad] def frozen_parameters_names(self, module: Optional[nn.Module]=None): r"""[NODOC] A small sugar function to return all the frozen parameters' name in the (by default, backbone) model. Args: module (:obj:`nn.Module`): of which module we want to know the frozen paramemters' name. Returns: :obj:`List[str]` """ if module is None: module = self.backbone_model return [n for n,p in module.named_parameters() if not p.requires_grad] def trainable_parameters(self,module: Optional[nn.Module]=None): r"""[NODOC] A small sugar function to return all the frozen parameters in the (by default, backbone) model. Args: module (:obj:`nn.Module`): of which module we want to know the frozen paramemters. Returns: :obj:`List[nn.Parameter]` """ if module is None: module = self return [p for n,p in module.named_parameters() if p.requires_grad] def num_trainable_parameters(self, module: Optional[nn.Module]=None): r"""[NODOC] A small sugar function to get the number of trainable parameter in the backbone model. Often used to compute the trainable rate. Args: module (:obj:`nn.Module`): of which module we want to know the number of trainable paramemters. Returns: :obj:`List[nn.Parameter]` """ if module is None: module = self pnum_tot = 0 for param in module.parameters(): if param.requires_grad: pnum_tot += param.numel() return pnum_tot def num_total_parameters(self, module: Optional[nn.Module]=None): r"""[NODOC] A small sugar function to get the number of trainable parameter in the backbone model. Often used to compute the trainable rate. Args: module (:obj:`nn.Module`): of which module we want to know the number of trainable paramemters. Returns: :obj:`List[nn.Parameter]` """ if module is None: module = self pnum_tot = 0 for param in module.parameters(): pnum_tot += param.numel() return pnum_tot def find_module(self, root_module: nn.Module, key:str): r"""Find the module using a key and the root module. Return both the parent reference, the child name and reference. Args: root_module (:obj:`root_module`): The root_module to find the sub module in key (:obj:`str`): The relative key to the root module. Returns: (:obj:`nn.Module`, :obj:`str`, :obj:`nn.Module`): * A reference to the parent module of the target module, mainly for substuting the target module. * The key of the target module relevant to its parent module * Target module. """ sub_keys = key.split(".") parent_module = root_module for sub_key in sub_keys[:-1]: parent_module = getattr(parent_module, sub_key) module = getattr(parent_module, sub_keys[-1]) return parent_module, sub_keys[-1], module def _register_delta_infos(self, parent_module, _delta_info): r"""Register the delta infomation. Automatically incrementing the suffix for repeated delta_names """ _delta_infos = getattr(parent_module, "_delta_infos", []) if len(_delta_infos) > 0: # check if duplicated name list_of_deltas = [d['delta_name'] for d in _delta_infos] cur_name = _delta_info['delta_name'] if cur_name in list_of_deltas: cur_name = cur_name + "_1" counter = 1 while cur_name in list_of_deltas: counter += 1 cur_name = cur_name.split("_")[0] + "_"+str(counter) _delta_info["delta_name"] = cur_name _delta_infos.append(_delta_info) setattr(parent_module, "_delta_infos", _delta_infos) def replace_module(self, parent_module: nn.Module, child_name: str, child_module: nn.Module, new_module: nn.Module, delta_name: Optional[str] = "delta", ): r"""Replace a module's child module with the new_module(a delta module). Used by delta method based on direct replacement, such as :class:`opendelta.delta_modules.lora.LoraModel`. Args: parent_module (:obj:`nn.Module`): The parent module of the replacement. child_name (:obj:`str`): The chird module's name, i.e., parent_module.child_name give us child_module child_module (:obj:`nn.Module`): The original child module. new_module (:obj:`nn.Module`): The delta module. delta_name (:obj:`str`, *optional*, default ot ``delta``): The name of the delta module, used for recording. parent_module.delta_name WILL NOT give you the delta module. """ self.delta_modules.append(new_module) setattr(parent_module, child_name, new_module) # register delta info _delta_info = {"method": "replace", "delta_module": new_module, "child_name": child_name, "org_module": child_module, "delta_name": delta_name, "delta_belong": self, "state": "on"} self._register_delta_infos(parent_module=parent_module, _delta_info = _delta_info, ) def modify_module(self, module: nn.Module): r"""Modify the inside parameteres of a module. This method will be reimplemented in different derived class if needed. """ raise NotImplementedError def insert_sequential_module(self, module, delta_module=None, delta_name='delta', strict=False, _delta_info=None): r"""insert a module (previous not exists in the code base) before/after a module. Specifically, it modifies the forward function of the original module to firstly pass the arguments into the new module's forward function and then pass it into the original ones. The new module can also be inserted after the original module with similar mechanism. When implementing the new module , researchers should be aware of the components of arguments of the original module's forward function. Args: module: (:obj:`nn.Module`): The (sub)module to inserted a delta module. delta_module: (:obj:`DeltaBase`): The delta module to be inserted. name: (:obj:`str`, *optional*): The name of the delta in the backbone module. strict: (:obj:`bool`, *optional*): Whether to prohibit modify a modified module. _delta_info (:obj:`Dict`, *optional*): Used in attach(), reattach a delta module to backbone. The info of original delta is passed through ``_delta_info``. """ def _caller(_org_func, org_module, delta_name, *args, **kwargs): args = args[1:] # the first argument here is ``self`` delta_module = getattr(org_module, delta_name) if hasattr(delta_module, "pre_forward"):# is not None: args, kwargs = delta_module.pre_forward(*args, **kwargs) # from IPython import embed # embed(header = "true") ret = _org_func(*args, **kwargs) if hasattr(delta_module, "post_forward"):# is not None: ret = delta_module.post_forward(ret) return ret if strict: if hasattr(module.forward, "__wrapped__"): raise RuntimeWarning("The forward function might have been wrapped by a decorator, is it intended?") # record info for plug and unplug and nested wrap if _delta_info is None: if delta_module is None: raise RuntimeError("delta module can't be none to ensure successful replicate of the parent module.") _delta_info = {"method": "insert_sequential", "delta_module": delta_module, "delta_name": delta_name, "delta_belong": self, "state": "on"} self._register_delta_infos(parent_module=module, _delta_info = _delta_info) else: delta_module = _delta_info["delta_module"] delta_name = _delta_info["delta_name"] setattr(module, _delta_info['delta_name'], _delta_info["delta_module"]) new_forward = decorate(module.forward, _caller, extras=(module, _delta_info['delta_name']), kwsyntax=True) # decorator.decorate helps preserving the functions metadata (signature, etc.). module.forward = new_forward.__get__(module, type(module)) # func.__get__(object, type(object)) register a function as an object's method # for DataParallel's copy behavior. Experimental: # may have bugs when module.forward is nestedly wrapped. module._replicate_for_data_parallel = new_replicate_for_data_parallel.__get__(module, type(module)) def insert_parallel_module(self, module, delta_module=None, delta_name='delta', strict=False, _delta_info=None): """insert a module (previous not exists in the code base) across a module. Specifically, it modifies the forward function of the original module to firstly pass the arguments into the delta model's forward function and set aside the calculation result. Then combine it with the calculation result output from the backbone module. When implementing the new module , researchers should be aware of the arguments and keywards of the original module's forward function. Args: module: (:obj:`nn.Module`): The (sub)module to inserted a delta module. delta_module: (:obj:`DeltaBase`): The delta module to be inserted. name: (:obj:`str`, *optional*): The name of the delta in the backbone module. strict: (:obj:`bool`, *optional*): Whether to prohibit modify a modified module. _delta_info (:obj:`Dict`, *optional*): Used in attach(), reattach a delta module to backbone. The info of original delta is passed through ``_delta_info``. """ def _caller(_org_func, org_module, delta_name, *args, **kwargs): args = args[1:] # the first argument here is ``self`` delta_module = getattr(org_module, delta_name) ret_1 = _org_func(*args, **kwargs) ret_2 = delta_module.forward(*args, **kwargs) return ret_1 + ret_2 if strict: if hasattr(module.forward, "__wrapped__"): raise RuntimeWarning("The forward function might have been wrapped by a decorator, is it intended?") # record info for plug and unplug and nested wrap if _delta_info is None: if delta_module is None: raise RuntimeError("delta module can't be none to ensure successful replicate of the parent module.") _delta_info = {"method": "insert_parallel", "delta_module": delta_module, "delta_name": delta_name, "delta_belong": self, "state": "on"} self._register_delta_infos(parent_module=module, _delta_info = _delta_info) else: delta_module = _delta_info["delta_module"] delta_name = _delta_info["delta_name"] setattr(module, _delta_info['delta_name'], _delta_info["delta_module"]) new_forward = decorate(module.forward, _caller, extras=(module, _delta_info['delta_name']), kwsyntax=True) # decorator.decorate helps preserving the functions metadata (signature, etc.). module.forward = new_forward.__get__(module, type(module)) # func.__get__(object, type(object)) register a function as an object's method # for DataParallel's copy behavior. Experimental: # may have bugs when module.forward is nestedly wrapped. module._replicate_for_data_parallel = new_replicate_for_data_parallel.__get__(module, type(module)) def set_active_state_dict(self, module: nn.Module): r"""modify the state_dict function of the model (by default, the backbone model) to return only the tunable part. Args: module (:obj:`nn.Module`): The module modified. The modification is in-place. """ def _caller(_org_func, includes, *args, **kwargs): state_dict = _org_func(*args, **kwargs) keys = list(state_dict.keys()) for n in keys: if n not in includes: state_dict.pop(n) return state_dict includes = self.trainable_parameters_names(module) # use excludes will have trouble when the model have shared weights # print(includes, "grad:",self.backbone_model.plm.lm_head.weight.requires_grad) # exit() if hasattr(module.state_dict, "__wrapped__"): raise RuntimeWarning("The forward function might have been wrapped by a decorator, is it intended?") module.state_dict = decorate(module.state_dict, _caller, extras=(includes,), kwsyntax=True) # decorator.decorate helps preserving the functions metadata (signature, etc.). def _load_state_dict_into_backbone(self, backbone_model: nn.Module = None, state_dict: dict = {}): r"""[NODOC] """ if backbone_model is None: backbone_model = self.backbone_model self.backbone_model.load_state_dict(state_dict, strict=False) def create_config_from_model(self, ): r"""[NODOC] If the delta model was built by directly passing arguments, instead of passing a config object. create the config of the delta model for saving the delta model. """ # common_attributes config = self.config_class() config_keys = signature(config.__init__)[0] + signature(super(self.config_class, config).__init__)[0] for key in config_keys: val = getattr(self, key) if hasattr(self, key) else None setattr(config, key, val) config.delta_type = self.delta_type self.config = config def log(self, module=None, delta_ratio=True, trainable_ratio=True, visualization=True): r"""Log and visualize the result of applying delta. Possible Options are ``trainable_ratio``, ``visualization``, ``delta_ratio``. Args: delta_ratio (:obj:`bool`, *optional*): Whether computing the ratio of parameters in the delta modules. trainable_ratio (:obj:`bool`, *optional*): Whether computing the ratio of trainable parameters. visualization (:obj:`bool`, *optional*): Whether visualize the parameter information of the modified backbone. """ if module is None: module = self.backbone_model if visualization: from opendelta import Visualization Visualization(module).structure_graph() if trainable_ratio: n_trainable = self.num_trainable_parameters(module) n_total = self.num_total_parameters(module) logger.info("Trainable Ratio: {:2f}%".format(n_trainable/n_total*100)) if delta_ratio: n_delta = self.num_delta_parameters(module) n_total = self.num_total_parameters(module) logger.info("Delta Parameter Ratio: {:2f}%".format(n_delta/n_total*100)) def num_delta_parameters(self, module: Optional[nn.Module]=None): r"""[NODOC] A small sugar function to get the number of trainable parameter in the backbone model. Often used to compute the trainable rate. Args: module (:obj:`nn.Module`): of which module we want to know the number of trainable paramemters. Returns: :obj:`List[nn.Parameter]` """ if module is None: module = self.backbone_model pnum_tot = 0 for param in module.parameters(): if hasattr(param, "_is_delta"): pnum_tot += param.numel() return pnum_tot # Two functions for plug and remove the delta model. def attach(self, module: Optional[nn.Module]=None,): r"""Reattach the delta modules to the backbone. Note that this method can not be used to create new delta modules. Instead, a :meth:`DeltaBase.detach` should precede this method. Args: module (:obj:`object`, *optional*, default to :obj:`None`): The backbone module that we reattach the deltas to. """ if module is None: module = self.backbone_model for name, submodule in module.named_modules(): if hasattr(submodule, "_delta_infos"): _delta_infos = getattr(submodule, "_delta_infos") for _delta_info in _delta_infos: if _delta_info['delta_belong'] is not self: continue if _delta_info["state"] == "on": continue if _delta_info['method'] == "replace": setattr(submodule, _delta_info["child_name"], _delta_info['delta_module']) elif _delta_info['method'] == "insert_sequential": self.insert_sequential_module(module=submodule, _delta_info=_delta_info) else: raise NotImplementedError _delta_info['state'] = "on" def detach(self, module: Optional[nn.Module]=None,): r"""Detach the delta module from the backbone. The delta module is not deleted, but temporarily turned off. Use :meth:`DeltaBase.attach` to reattach the delta model to the backbone. Args: module (:obj:`object`, *optional*, default to :obj:`None`): The backbone module that we detached the deltas from. """ if module is None: module = self.backbone_model for name, submodule in module.named_modules(): if hasattr(submodule, "_delta_infos"): _delta_infos = getattr(submodule, "_delta_infos") for _delta_info in _delta_infos: if _delta_info['delta_belong'] is not self: continue if _delta_info["state"] == "off": continue if _delta_info['method'] == "replace": setattr(submodule, _delta_info["child_name"], _delta_info['org_module']) elif _delta_info['method'] == "insert_sequential": if hasattr(submodule.forward, "__wrapped__"): submodule.forward = submodule.forward.__wrapped__ delattr(submodule, _delta_info["delta_name"]) else: raise AttributeError("submodule {}'s forward has no attribute __wrapped__. It'ss not a wrapped function.".format(name)) else: raise NotImplementedError _delta_info['state'] = "off"