[Compression] evaluator - step2 (#4992)

nni/algorithms/compression/v2/pytorch/utils/constructor_helper.py

@@ -11,7 +11,7 @@ from torch.nn import Module
 from torch.optim import Optimizer
 from torch.optim.lr_scheduler import _LRScheduler
 
-from nni.common.serializer import Traceable, is_traceable
+from nni.common.serializer import is_traceable
 
 __all__ = ['OptimizerConstructHelper', 'LRSchedulerConstructHelper']
 
@@ -86,7 +86,8 @@ class OptimizerConstructHelper(ConstructHelper):
             'Please use nni.trace to wrap the optimizer class before initialize the optimizer.'
         assert isinstance(optimizer_trace, Optimizer), \
             'It is not an instance of torch.nn.Optimizer.'
-        return OptimizerConstructHelper(model, optimizer_trace.trace_symbol, *optimizer_trace.trace_args, **optimizer_trace.trace_kwargs)  # type: ignore
+        return OptimizerConstructHelper(model, optimizer_trace.trace_symbol, *optimizer_trace.trace_args,  # type: ignore
+                                        **optimizer_trace.trace_kwargs)  # type: ignore
 
 
 class LRSchedulerConstructHelper(ConstructHelper):
@@ -115,4 +116,5 @@ class LRSchedulerConstructHelper(ConstructHelper):
             'Please use nni.trace to wrap the lr scheduler class before initialize the scheduler.'
         assert isinstance(lr_scheduler_trace, _LRScheduler), \
             'It is not an instance of torch.nn.lr_scheduler._LRScheduler.'
-        return LRSchedulerConstructHelper(lr_scheduler_trace.trace_symbol, *lr_scheduler_trace.trace_args, **lr_scheduler_trace.trace_kwargs)  # type: ignore
+        return LRSchedulerConstructHelper(lr_scheduler_trace.trace_symbol, *lr_scheduler_trace.trace_args,  # type: ignore
+                                          **lr_scheduler_trace.trace_kwargs)  # type: ignore

nni/algorithms/compression/v2/pytorch/utils/docstring.py

+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
+
+_EVALUATOR_DOCSTRING = r"""NNI will use the evaluator to intervene in the model training process,
+        so as to perform training-aware model compression.
+        All training-aware model compression will use the evaluator as the entry for intervention training in the future.
+        Usually you just need to wrap some classes with ``nni.trace`` or package the training process as a function to initialize the evaluator.
+        Please refer ... for a full tutorial on how to initialize a ``evaluator``.
+
+        The following are two simple examples, if you use pytorch_lightning, please refer to :class:`nni.compression.pytorch.LightningEvaluator`,
+        if you use native pytorch, please refer to :class:`nni.compression.pytorch.TorchEvaluator`::
+
+            # LightningEvaluator example
+            import pytorch_lightning
+            lightning_trainer = nni.trace(pytorch_lightning.Trainer)(max_epochs=1, max_steps=50, logger=TensorBoardLogger(...))
+            lightning_data_module = nni.trace(pytorch_lightning.LightningDataModule)(...)
+
+            from nni.compression.pytorch import LightningEvaluator
+            evaluator = LightningEvaluator(lightning_trainer, lightning_data_module)
+
+            # TorchEvaluator example
+            import torch
+            import torch.nn.functional as F
+
+            def training_model(model, optimizer, criterion, lr_scheduler, max_steps, max_epochs, *args, **kwargs):
+                # max_steps, max_epochs might be None, which means unlimited training time,
+                # so here we need set a default termination condition (by default, total_epochs=10, total_steps=100000).
+                total_epochs = max_epochs if max_epochs else 10
+                total_steps = max_steps if max_steps else 100000
+                current_step = 0
+
+                # init dataloader
+                train_dataloader = ...
+
+                for epoch in range(total_epochs):
+                    ...
+                    for input_data, target in train_dataloader:
+                        optimizer.zero_grad()
+                        result = model(input_data)
+                        loss = criterion(result, target)
+                        loss.backward()
+                        optimizer.step()
+                        current_step += 1
+                        if current_step >= total_steps:
+                            return
+                    lr_scheduler.step()
+
+            traced_optimizer = nni.trace(torch.optim.SGD)(model.parameters(), lr=0.01)
+            criterion = F.nll_loss
+
+            from nni.compression.pytorch import TorchEvaluator
+            evaluator = TorchEvaluator(training_func=training_model, optimziers=traced_optimizer, criterion=criterion)
+    """

nni/algorithms/compression/v2/pytorch/utils/evaluator.py

@@ -73,16 +73,16 @@ class TensorHook(Hook):
             return hook
     """
 
-    def __init__(self, target: Tensor, target_name: str, hook_factory: Callable[[List], Callable[[Tensor], Any]]):
+    def __init__(self, target: Tensor, target_name: str, hook_factory: Callable[[List], Callable[[Tensor], Tensor | None]]):
         assert isinstance(target, Tensor)
         super().__init__(target, target_name, hook_factory)
 
-    def _register(self, hook_func: Callable[[Tensor], Any]) -> RemovableHandle:
+    def _register(self, hook_func: Callable[[Tensor], Tensor | None]) -> RemovableHandle:
         return self.target.register_hook(hook_func)  # type: ignore
 
 
 class ModuleHook(Hook):
-    def __init__(self, target: Module, target_name: str, hook_factory: Callable[[List], Callable[[Module, Tensor, Tensor], Any]]):
+    def __init__(self, target: Module, target_name: str, hook_factory: Callable[[List], Callable[[Module, Any, Any], Any]]):
         assert isinstance(target, Module)
         super().__init__(target, target_name, hook_factory)
 
@@ -97,7 +97,7 @@ class ForwardHook(ModuleHook):
             return hook
     """
 
-    def _register(self, hook_func: Callable[[Module, Tensor, Tensor], Any]):
+    def _register(self, hook_func: Callable[[Module, Tuple[Any], Any], Any]):
         return self.target.register_forward_hook(hook_func)  # type: ignore
 
 
@@ -111,7 +111,7 @@ class BackwardHook(ModuleHook):
             return hook
     """
 
-    def _register(self, hook_func: Callable[[Module, Tensor, Tensor], Any]):
+    def _register(self, hook_func: Callable[[Module, Tuple[Tensor] | Tensor, Tuple[Tensor] | Tensor], Any]):
         return self.target.register_backward_hook(hook_func)  # type: ignore
 
 
@@ -148,7 +148,8 @@ class Evaluator:
 
     def bind_model(self, model: Module | pl.LightningModule, param_names_map: Dict[str, str] | None = None):
         """
-        Bind the model suitable for this ``Evaluator`` to use the evaluator's abilities of model modification, model training, and model evaluation.
+        Bind the model suitable for this ``Evaluator`` to use the evaluator's abilities of model modification,
+        model training, and model evaluation.
 
         Parameter
         ---------
@@ -246,10 +247,12 @@ class Evaluator:
     def evaluate(self) -> float | None | Tuple[float, Any] | Tuple[None, Any]:
         """
         NNI assume the evaluation function user passed in should return a float number or a dict as metric.
-        If the evaluation function returned a dict, take the value with dict key ``default`` as the first element of ``evaluate`` returned value,
+        If the evaluation function returned a dict, take the value with dict key ``default``
+        as the first element of ``evaluate`` returned value,
         and put the dict as the second element of the returned value.
         For any other type of the metric returned by evaluation function, ``evaluate`` will directly returned
-        (it should be a float, but NNI does not prevent other types from being returned, this will handle by the object calling ``evaluate``).
+        (it should be a float, but NNI does not prevent other types from being returned,
+        this will handle by the object calling ``evaluate``).
         """
         # Note that the first item of the returned value will be used as the default metric used by NNI.
         raise NotImplementedError
@@ -287,9 +290,11 @@ class LightningEvaluator(Evaluator):
 
     def __init__(self, trainer: pl.Trainer, data_module: pl.LightningDataModule,
                  dummy_input: Any | None = None):
-        err_msg = 'Only support traced {}, please use nni.trace({}) to initialize the trainer.'
-        assert isinstance(trainer, pl.Trainer) and is_traceable(trainer), err_msg.format('pytorch_lightning.Trainer', 'pytorch_lightning.Trainer')
-        assert isinstance(data_module, pl.LightningDataModule) and is_traceable(data_module), err_msg.format('pytorch_lightning.LightningDataModule', 'pytorch_lightning.LightningDataModule')
+        err_msg_p = 'Only support traced {}, please use nni.trace({}) to initialize the trainer.'
+        err_msg = err_msg_p.format('pytorch_lightning.Trainer', 'pytorch_lightning.Trainer')
+        assert isinstance(trainer, pl.Trainer) and is_traceable(trainer), err_msg
+        err_msg = err_msg_p.format('pytorch_lightning.LightningDataModule', 'pytorch_lightning.LightningDataModule')
+        assert isinstance(data_module, pl.LightningDataModule) and is_traceable(data_module), err_msg
         self.trainer = trainer
         self.data_module = data_module
         self._dummy_input = dummy_input
@@ -314,18 +319,20 @@ class LightningEvaluator(Evaluator):
         optimizers_lr_schedulers: Any = pure_model.configure_optimizers()
         # 1. None - Fit will run without any optimizer.
         if optimizers_lr_schedulers is None:
-            err_msg = 'NNI does not support `LightningModule.configure_optimizers` returned None, '
-            err_msg += 'if you have a reason why you must, please file an issue at https://github.com/microsoft/nni/issues'
+            err_msg = 'NNI does not support `LightningModule.configure_optimizers` returned None, ' + \
+                      'if you have a reason why you must, please file an issue at https://github.com/microsoft/nni/issues'
             raise ValueError(err_msg)
         # 2. Single optimizer.
-        # 3. Dictionary, with an "optimizer" key, and (optionally) a "lr_scheduler" key whose value is a single LR scheduler or lr_scheduler_config.
+        # 3. Dictionary, with an "optimizer" key, and (optionally) a "lr_scheduler" key whose
+        # value is a single LR scheduler or lr_scheduler_config.
         elif isinstance(optimizers_lr_schedulers, (Optimizer, dict)):
             optimizers_lr_schedulers = [optimizers_lr_schedulers]
 
         err_msg = f'Got an wrong returned value type of `LightningModule.configure_optimizers`: {type(optimizers_lr_schedulers).__name__}'
         assert isinstance(optimizers_lr_schedulers, (list, tuple)), err_msg
 
-        # 4. Two lists - the first list has multiple optimizers, and the second has multiple LR schedulers (or multiple lr_scheduler_config).
+        # 4. Two lists - the first list has multiple optimizers,
+        # and the second has multiple LR schedulers (or multiple lr_scheduler_config).
         if isinstance(optimizers_lr_schedulers[0], (list, tuple)):
             optimizers, lr_schedulers = optimizers_lr_schedulers
             self._optimizer_helpers = [OptimizerConstructHelper.from_trace(pure_model, optimizer) for optimizer in optimizers]
@@ -364,7 +371,8 @@ class LightningEvaluator(Evaluator):
         self._initialization_complete = True
 
     def bind_model(self, model: pl.LightningModule, param_names_map: Dict[str, str] | None = None):
-        assert self._initialization_complete is True, 'Evaluator initialization is not complete, please call `_init_optimizer_helpers` before bind model.'
+        err_msg = 'Evaluator initialization is not complete, please call `_init_optimizer_helpers` before bind model.'
+        assert self._initialization_complete is True, err_msg
         assert isinstance(model, pl.LightningModule)
         if self.model is not None:
             _logger.warning('Already bound a model, will unbind it before bind a new model.')
@@ -397,7 +405,8 @@ class LightningEvaluator(Evaluator):
         if self._opt_returned_dicts:
             def new_configure_optimizers(_):  # type: ignore
                 optimizers = [opt_helper.call(self.model, self._param_names_map) for opt_helper in self._optimizer_helpers]  # type: ignore
-                lr_schedulers = [lrs_helper.call(optimizers[self._lrs_opt_map[i]]) for i, lrs_helper in enumerate(self._lr_scheduler_helpers)]
+                lr_schedulers = [lrs_helper.call(optimizers[self._lrs_opt_map[i]])
+                                 for i, lrs_helper in enumerate(self._lr_scheduler_helpers)]
                 opt_lrs_dicts = deepcopy(self._opt_returned_dicts)
                 for opt_lrs_dict in opt_lrs_dicts:
                     opt_lrs_dict['optimizer'] = optimizers[opt_lrs_dict['optimizer']]
@@ -407,7 +416,8 @@ class LightningEvaluator(Evaluator):
         elif self._lr_scheduler_helpers:
             def new_configure_optimizers(_):  # type: ignore
                 optimizers = [opt_helper.call(self.model, self._param_names_map) for opt_helper in self._optimizer_helpers]  # type: ignore
-                lr_schedulers = [lrs_helper.call(optimizers[self._lrs_opt_map[i]]) for i, lrs_helper in enumerate(self._lr_scheduler_helpers)]
+                lr_schedulers = [lrs_helper.call(optimizers[self._lrs_opt_map[i]])
+                                 for i, lrs_helper in enumerate(self._lr_scheduler_helpers)]
                 return optimizers, lr_schedulers
         else:
             def new_configure_optimizers(_):
@@ -442,7 +452,8 @@ class LightningEvaluator(Evaluator):
         assert isinstance(self.model, pl.LightningModule)
 
         class OptimizerCallback(Callback):
-            def on_before_optimizer_step(self, trainer: pl.Trainer, pl_module: pl.LightningModule, optimizer: Optimizer, opt_idx: int) -> None:
+            def on_before_optimizer_step(self, trainer: pl.Trainer, pl_module: pl.LightningModule,
+                                         optimizer: Optimizer, opt_idx: int) -> None:
                 for task in before_step_tasks:
                     task()
 
@@ -486,10 +497,12 @@ class LightningEvaluator(Evaluator):
 
     def evaluate(self) -> Tuple[float | None, List[Dict[str, float]]]:
         """
-        NNI will use metric with key ``default`` for evaluating model, please make sure you have this key in your ``Trainer.test()`` returned metric dicts.
-        If ``Trainer.test()`` returned list contains multiple dicts with key ``default``, NNI will take their average as the final metric.
-        E.g., if ``Trainer.test()`` returned ``[{'default': 0.8, 'loss': 2.3}, {'default': 0.6, 'loss': 2.4}, {'default': 0.7, 'loss': 2.3}]``,
-        NNI will take the final metric ``(0.8 + 0.6 + 0.7) / 3 = 0.7``.
+        NNI will use metric with key ``default`` for evaluating model,
+        please make sure you have this key in your ``Trainer.test()`` returned metric dicts.
+        If ``Trainer.test()`` returned list contains multiple dicts with key ``default``,
+        NNI will take their average as the final metric.
+        E.g., if ``Trainer.test()`` returned ``[{'default': 0.8, 'loss': 2.3}, {'default': 0.6, 'loss': 2.4}]``,
+        NNI will take the final metric ``(0.8 + 0.6) / 2 = 0.7``.
         """
         assert isinstance(self.model, pl.LightningModule)
         # reset trainer
@@ -514,9 +527,11 @@ class LightningEvaluator(Evaluator):
             raise e
 
 
+_OPTIMIZERS = Union[Optimizer, List[Optimizer]]
 _CRITERION = Callable[[Any, Any], Any]
+_SCHEDULERS = Union[None, _LRScheduler, List[_LRScheduler]]
 _EVALUATING_FUNC = Callable[[Module], Union[float, Dict]]
-_TRAINING_FUNC = Callable[[Module, Union[Optimizer, List[Optimizer]], _CRITERION, Union[None, _LRScheduler, List[_LRScheduler]], Optional[int], Optional[int]], None]
+_TRAINING_FUNC = Callable[[Module, _OPTIMIZERS, _CRITERION, _SCHEDULERS, Optional[int], Optional[int]], None]
 
 
 class TorchEvaluator(Evaluator):
@@ -528,8 +543,10 @@ class TorchEvaluator(Evaluator):
     ----------
     training_func
         The training function is used to train the model, note that this a entire optimization training loop.
-        It should have three required parameters [model, optimizers, criterion] and three optional parameters [schedulers, max_steps, max_epochs].
-        ``optimizers`` can be an instance of ``torch.optim.Optimizer`` or a list of ``torch.optim.Optimizer``, it belongs to the ``optimizers`` pass to ``TorchEvaluator``.
+        It should have three required parameters [model, optimizers, criterion]
+        and three optional parameters [schedulers, max_steps, max_epochs].
+        ``optimizers`` can be an instance of ``torch.optim.Optimizer`` or a list of ``torch.optim.Optimizer``,
+        it belongs to the ``optimizers`` pass to ``TorchEvaluator``.
         ``criterion`` and ``schedulers`` are also belonging to the ``criterion`` and ``schedulers`` pass to ``TorchEvaluator``.
         ``max_steps`` and ``max_epochs`` are used to control the training duration.
 
@@ -574,7 +591,8 @@ class TorchEvaluator(Evaluator):
         Optional. The traced _LRScheduler instance which the lr scheduler class is wrapped by nni.trace.
         E.g. ``traced_lr_scheduler = nni.trace(ExponentialLR)(optimizer, 0.1)``.
     dummy_input
-        Optional. The dummy_input is used to trace the graph, the same with ``example_inputs`` in ``torch.jit.trace(func, example_inputs, ...)``.
+        Optional. The dummy_input is used to trace the graph,
+        the same with ``example_inputs`` in ``torch.jit.trace(func, example_inputs, ...)``.
     evaluating_func
         Optional. A function that input is model and return the evaluation metric.
         The return value can be a single float or a tuple (float, Any).
@@ -634,14 +652,16 @@ class TorchEvaluator(Evaluator):
         self._lr_scheduler_helpers = [LRSchedulerConstructHelper.from_trace(lr_scheduler) for lr_scheduler in self._tmp_lr_schedulers]
         optimizer_ids_map = {id(optimizer): i for i, optimizer in enumerate(self._tmp_optimizers)}
         # record i-th lr_scheduler scheduling j-th optimizer lr
-        self._lrs_opt_map = {i: optimizer_ids_map[id(lr_scheduler.optimizer)] for i, lr_scheduler in enumerate(self._tmp_lr_schedulers)}  # type: ignore
+        self._lrs_opt_map = {i: optimizer_ids_map[id(lr_scheduler.optimizer)]  # type: ignore
+                             for i, lr_scheduler in enumerate(self._tmp_lr_schedulers)}  # type: ignore
 
         delattr(self, '_tmp_optimizers')
         delattr(self, '_tmp_lr_schedulers')
         self._initialization_complete = True
 
     def bind_model(self, model: Module, param_names_map: Dict[str, str] | None = None):
-        assert self._initialization_complete is True, 'Evaluator initialization is not complete, please call `_init_optimizer_helpers` before bind model.'
+        err_msg = 'Evaluator initialization is not complete, please call `_init_optimizer_helpers` before bind model.'
+        assert self._initialization_complete is True, err_msg
         assert isinstance(model, Module)
         if self.model is not None:
             _logger.warning('Already bound a model, will unbind it before bind a new model.')
@@ -651,7 +671,8 @@ class TorchEvaluator(Evaluator):
         self._param_names_map = param_names_map
         # initialize optimizers & lr_schedulers for the bound model here
         self._optimizers = [helper.call(model, param_names_map) for helper in self._optimizer_helpers]
-        self._lr_schedulers = [lrs_helper.call(self._optimizers[self._lrs_opt_map[i]]) for i, lrs_helper in enumerate(self._lr_scheduler_helpers)]
+        self._lr_schedulers = [lrs_helper.call(self._optimizers[self._lrs_opt_map[i]]) \
+                               for i, lrs_helper in enumerate(self._lr_scheduler_helpers)]
         self._first_optimizer_step = self._optimizers[0].step
 
     def unbind_model(self):
@@ -717,7 +738,8 @@ class TorchEvaluator(Evaluator):
         if isinstance(metric, dict):
             nni_used_metric = metric.get('default', None)
             if nni_used_metric is None:
-                warn_msg = f'Evaluation function returns a dict metric without key `default`, will return None as the model evaluation metric value.'
+                warn_msg = f'Evaluation function returns a dict metric without key `default`,' + \
+                           'will return None as the model evaluation metric value.'
                 _logger.warning(warn_msg)
             return nni_used_metric, metric
         else:

nni/algorithms/compression/v2/pytorch/utils/pruning.py

@@ -229,7 +229,8 @@ def compute_sparsity(origin_model: Module, compact_model: Module, compact_model_
     return current2origin_sparsity, compact2origin_sparsity, mask2compact_sparsity
 
 
-def get_model_weights_numel(model: Module, config_list: List[Dict], masks: Dict[str, Dict[str, Tensor]] = {}) -> Tuple[Dict[str, int], Dict[str, float]]:
+def get_model_weights_numel(model: Module, config_list: List[Dict],
+                            masks: Dict[str, Dict[str, Tensor]] = {}) -> Tuple[Dict[str, int], Dict[str, float]]:
     """
     Count the layer weight elements number in config_list.
     If masks is not empty, the masked weight will not be counted.

nni/algorithms/compression/v2/pytorch/utils/scaling.py

@@ -53,18 +53,24 @@ class Scaling:
             # for the `-1` in kernel_size, then expand size (4, 3, 1) to size (4, 6, 2).
     kernel_padding_mode
         'front' or 'back', default is 'front'.
-        If set 'front', for a given tensor when shrinking, padding `1` at front of kernel_size until `len(tensor.shape) == len(kernel_size)`;
-        for a given expand size when expanding, padding `1` at front of kernel_size until `len(expand_size) == len(kernel_size)`.
-        If set 'back', for a given tensor when shrinking, padding `-1` at back of kernel_size until `len(tensor.shape) == len(kernel_size)`;
-        for a given expand size when expanding, padding `-1` at back of kernel_size until `len(expand_size) == len(kernel_size)`.
+        If set 'front', for a given tensor when shrinking,
+        padding `1` at front of kernel_size until `len(tensor.shape) == len(kernel_size)`;
+        for a given expand size when expanding,
+        padding `1` at front of kernel_size until `len(expand_size) == len(kernel_size)`.
+        If set 'back', for a given tensor when shrinking,
+        padding `-1` at back of kernel_size until `len(tensor.shape) == len(kernel_size)`;
+        for a given expand size when expanding,
+        padding `-1` at back of kernel_size until `len(expand_size) == len(kernel_size)`.
     """
 
     def __init__(self, kernel_size: List[int], kernel_padding_mode: Literal['front', 'back'] = 'front') -> None:
         self.kernel_size = kernel_size
-        assert kernel_padding_mode in ['front', 'back'], f"kernel_padding_mode should be one of ['front', 'back'], but get kernel_padding_mode={kernel_padding_mode}."
+        err_msg = f"kernel_padding_mode should be one of ['front', 'back'], but get kernel_padding_mode={kernel_padding_mode}."
+        assert kernel_padding_mode in ['front', 'back'], err_msg
         self.kernel_padding_mode = kernel_padding_mode
 
-    def _padding(self, _list: List[int], length: int, padding_value: int = -1, padding_mode: Literal['front', 'back'] = 'back') -> List[int]:
+    def _padding(self, _list: List[int], length: int, padding_value: int = -1,
+                 padding_mode: Literal['front', 'back'] = 'back') -> List[int]:
         """
         Padding the `_list` to a specific length with `padding_value`.
 
@@ -144,10 +150,12 @@ class Scaling:
                 assert b % a == 0, f'Can not expand tensor with {target.shape} to {expand_size} with kernel size {kernel_size}.'
                 _expand_size.append(b // a)
                 _expand_size.append(a)
-        new_target: Tensor = reduce(lambda t, dim: t.unsqueeze(dim), [new_target] + [2 * _ + 1 for _ in range(len(expand_size))])  # type: ignore
+        new_target: Tensor = reduce(lambda t, dim: t.unsqueeze(dim),
+                                    [new_target] + [2 * _ + 1 for _ in range(len(expand_size))])  # type: ignore
 
         # step 3: expanding the new target to _expand_size and reshape to expand_size.
-        # Note that we can also give an interface for how to expand the tensor, like `reduce_func` in `_shrink`, currently we don't have that need.
+        # Note that we can also give an interface for how to expand the tensor, like `reduce_func` in `_shrink`,
+        # currently we don't have that need.
         result = new_target.expand(_expand_size).reshape(expand_size).clone()
 
         return result

nni/compression/pytorch/__init__.py

 # Copyright (c) Microsoft Corporation.
 # Licensed under the MIT license.
 
+from nni.algorithms.compression.v2.pytorch import TorchEvaluator, LightningEvaluator
 from .speedup import ModelSpeedup
 from .compressor import Compressor, Pruner, Quantizer
 from .utils.apply_compression import apply_compression_results

pyrightconfig.json

@@ -3,6 +3,7 @@
         "nni/algorithms/compression/pytorch",
         "nni/algorithms/compression/tensorflow",
         "nni/algorithms/compression/v2/pytorch/base/pruner.py",
+        "nni/algorithms/compression/v2/pytorch/pruning/amc_pruner.py",
         "nni/algorithms/feature_engineering",
         "nni/algorithms/hpo",
         "nni/algorithms/nas",

test/algo/compression/assets/common.py

+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
+from pathlib import Path
+from typing import Any, Dict, List
+
+import torch
+
+from .device import device
+from .simple_mnist import SimpleLightningModel, SimpleTorchModel
+from .utils import unfold_config_list
+
+
+log_dir = Path(__file__).parent.parent / 'logs'
+
+
+def create_model(model_type: str):
+    torch_config_list = [{'op_types': ['Linear'], 'sparsity': 0.5},
+                         {'op_names': ['conv1', 'conv2', 'conv3'], 'sparsity': 0.5},
+                         {'op_names': ['fc2'], 'exclude': True}]
+
+    lightning_config_list = [{'op_types': ['Linear'], 'sparsity': 0.5},
+                             {'op_names': ['model.conv1', 'model.conv2', 'model.conv3'], 'sparsity': 0.5},
+                             {'op_names': ['model.fc2'], 'exclude': True}]
+
+    if model_type == 'lightning':
+        model = SimpleLightningModel()
+        config_list = lightning_config_list
+        dummy_input = torch.rand(8, 1, 28, 28)
+    elif model_type == 'pytorch':
+        model = SimpleTorchModel().to(device)
+        config_list = torch_config_list
+        dummy_input = torch.rand(8, 1, 28, 28, device=device)
+    else:
+        raise ValueError(f'wrong model_type: {model_type}')
+    return model, config_list, dummy_input
+
+
+def validate_masks(masks: Dict[str, Dict[str, torch.Tensor]], model: torch.nn.Module, config_list: List[Dict[str, Any]],
+                   is_global: bool = False):
+    config_dict = unfold_config_list(model, config_list)
+    # validate if all configured layers have generated mask.
+    mismatched_op_names = set(config_dict.keys()).symmetric_difference(masks.keys())
+    assert f'mismatched op_names: {mismatched_op_names}'
+
+    target_name = 'weight'
+    total_masked_numel = 0
+    total_target_numel = 0
+    for module_name, target_masks in masks.items():
+        mask = target_masks[target_name]
+        assert mask.numel() == (mask == 0).sum().item() + (mask == 1).sum().item(), f'{module_name} {target_name} mask has values other than 0 and 1.'
+        if not is_global:
+            excepted_sparsity = config_dict[module_name].get('sparsity', config_dict[module_name].get('total_sparsity'))
+            real_sparsity = (mask == 0).sum().item() / mask.numel()
+            err_msg = f'{module_name} {target_name} excepted sparsity: {excepted_sparsity}, but real sparsity: {real_sparsity}'
+            assert excepted_sparsity * 0.9 < real_sparsity < excepted_sparsity * 1.1, err_msg
+        else:
+            total_masked_numel += (mask == 0).sum().item()
+            total_target_numel += mask.numel()
+    if is_global:
+        excepted_sparsity = next(iter(config_dict.values())).get('sparsity', config_dict[module_name].get('total_sparsity'))
+        real_sparsity = total_masked_numel / total_target_numel
+        err_msg = f'excepted global sparsity: {excepted_sparsity}, but real global sparsity: {real_sparsity}.'
+        assert excepted_sparsity * 0.9 < real_sparsity < excepted_sparsity * 1.1, err_msg
+
+
+def validate_dependency_aware(model_type: str, masks: Dict[str, Dict[str, torch.Tensor]]):
+    # only for simple_mnist model
+    if model_type == 'lightning':
+        assert torch.equal(masks['model.conv2']['weight'].mean([1, 2, 3]), masks['model.conv3']['weight'].mean([1, 2, 3]))
+    if model_type == 'pytorch':
+        assert torch.equal(masks['conv2']['weight'].mean([1, 2, 3]), masks['conv3']['weight'].mean([1, 2, 3]))

test/algo/compression/assets/device.py

+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
+import torch
+
+device = torch.device("cuda" if torch.cuda.is_available() else "cpu")

test/algo/compression/assets/simple_mnist/__init__.py

+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
+from .simple_lightning_model import SimpleLightningModel, MNISTDataModule
+from .simple_torch_model import SimpleTorchModel, training_model, evaluating_model, finetuning_model
+from .simple_evaluator import create_lighting_evaluator, create_pytorch_evaluator

test/algo/compression/assets/simple_mnist/simple_evaluator.py

+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
+from __future__ import annotations
+
+from pathlib import Path
+
+import torch
+import torch.nn.functional as F
+from torch.optim.lr_scheduler import ExponentialLR
+
+import pytorch_lightning as pl
+from pytorch_lightning.loggers import TensorBoardLogger
+
+import nni
+from nni.algorithms.compression.v2.pytorch import LightningEvaluator, TorchEvaluator
+
+from .simple_torch_model import training_model, evaluating_model
+from .simple_lightning_model import MNISTDataModule
+from ..common import device
+
+
+def create_lighting_evaluator() -> LightningEvaluator:
+    pl_trainer = nni.trace(pl.Trainer)(
+        accelerator='auto',
+        devices=1,
+        max_epochs=1,
+        max_steps=50,
+        logger=TensorBoardLogger(Path(__file__).parent.parent / 'lightning_logs', name="resnet"),
+    )
+    pl.Trainer()
+    pl_trainer.num_sanity_val_steps = 0
+    pl_data = nni.trace(MNISTDataModule)(data_dir='data/mnist')
+    evaluator = LightningEvaluator(pl_trainer, pl_data, dummy_input=torch.rand(8, 1, 28, 28))
+    return evaluator
+
+
+def create_pytorch_evaluator(model: torch.nn.Module) -> TorchEvaluator:
+    optimizer = nni.trace(torch.optim.SGD)(model.parameters(), lr=0.01, momentum=0.9, weight_decay=5e-4)
+    lr_scheduler = nni.trace(ExponentialLR)(optimizer, 0.1)
+    evaluator = TorchEvaluator(training_model, optimizer, F.nll_loss, lr_scheduler,
+                               dummy_input=torch.rand(8, 1, 28, 28, device=device), evaluating_func=evaluating_model)
+    return evaluator

test/algo/compression/assets/simple_mnist/simple_lightning_model.py

+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
+from __future__ import annotations
+
+import pytorch_lightning as pl
+
+import torch
+import torch.nn.functional as F
+from torch.optim.lr_scheduler import ExponentialLR
+from torch.utils.data import random_split, DataLoader
+from torchmetrics.functional import accuracy
+from torchvision.datasets import MNIST
+from torchvision import transforms
+
+import nni
+
+from .simple_torch_model import SimpleTorchModel
+
+
+class SimpleLightningModel(pl.LightningModule):
+    def __init__(self):
+        super().__init__()
+        self.model = SimpleTorchModel()
+
+    def forward(self, x):
+        return self.model(x)
+
+    def training_step(self, batch, batch_idx):
+        x, y = batch
+        logits = self(x)
+        loss = F.nll_loss(logits, y)
+        self.log("train_loss", loss)
+        return loss
+
+    def evaluate(self, batch, stage=None):
+        x, y = batch
+        logits = self(x)
+        loss = F.nll_loss(logits, y)
+        preds = torch.argmax(logits, dim=1)
+        acc = accuracy(preds, y)
+
+        if stage:
+            self.log(f"default", loss, prog_bar=False)
+            self.log(f"{stage}_loss", loss, prog_bar=True)
+            self.log(f"{stage}_acc", acc, prog_bar=True)
+
+    def validation_step(self, batch, batch_idx):
+        self.evaluate(batch, "val")
+
+    def test_step(self, batch, batch_idx):
+        self.evaluate(batch, "test")
+
+    def configure_optimizers(self):
+        optimizer = nni.trace(torch.optim.SGD)(
+            self.parameters(),
+            lr=0.01,
+            momentum=0.9,
+            weight_decay=5e-4,
+        )
+        scheduler_dict = {
+            "scheduler": nni.trace(ExponentialLR)(
+                optimizer,
+                0.1,
+            ),
+            "interval": "epoch",
+        }
+        return {"optimizer": optimizer, "lr_scheduler": scheduler_dict}
+
+
+class MNISTDataModule(pl.LightningDataModule):
+    def __init__(self, data_dir: str = "./"):
+        super().__init__()
+        self.data_dir = 'data/mnist'
+        self.transform = transforms.Compose([transforms.ToTensor(), transforms.Normalize((0.1307,), (0.3081,))])
+
+    def prepare_data(self):
+        # download
+        MNIST(self.data_dir, train=True, download=True)
+        MNIST(self.data_dir, train=False, download=True)
+
+    def setup(self, stage: str | None = None):
+        # Assign train/val datasets for use in dataloaders
+        if stage == "fit" or stage is None:
+            mnist_full = MNIST(self.data_dir, train=True, transform=self.transform)
+            self.mnist_train, self.mnist_val = random_split(mnist_full, [55000, 5000])
+
+        # Assign test dataset for use in dataloader(s)
+        if stage == "test" or stage is None:
+            self.mnist_test = MNIST(self.data_dir, train=False, transform=self.transform)
+
+        if stage == "predict" or stage is None:
+            self.mnist_predict = MNIST(self.data_dir, train=False, transform=self.transform)
+
+    def train_dataloader(self):
+        return DataLoader(self.mnist_train, batch_size=32)
+
+    def val_dataloader(self):
+        return DataLoader(self.mnist_val, batch_size=32)
+
+    def test_dataloader(self):
+        return DataLoader(self.mnist_test, batch_size=32)
+
+    def predict_dataloader(self):
+        return DataLoader(self.mnist_predict, batch_size=32)

test/algo/compression/assets/simple_mnist/simple_torch_model.py

+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
+from __future__ import annotations
+
+from pathlib import Path
+from typing import Callable
+
+import torch
+from torch.nn import Module
+import torch.nn.functional as F
+from torch.optim import Optimizer
+from torch.optim.lr_scheduler import _LRScheduler
+from torch.utils.data import DataLoader
+from torchvision.datasets import MNIST
+from torchvision import transforms
+
+from ..device import device
+
+
+class SimpleTorchModel(torch.nn.Module):
+    def __init__(self):
+        super().__init__()
+        self.conv1 = torch.nn.Conv2d(1, 16, 3)
+        self.bn1 = torch.nn.BatchNorm2d(16)
+        self.conv2 = torch.nn.Conv2d(16, 8, 3, groups=4)
+        self.bn2 = torch.nn.BatchNorm2d(8)
+        self.conv3 = torch.nn.Conv2d(16, 8, 3)
+        self.bn3 = torch.nn.BatchNorm2d(8)
+        self.fc1 = torch.nn.Linear(8 * 24 * 24, 100)
+        self.fc2 = torch.nn.Linear(100, 10)
+
+    def forward(self, x: torch.Tensor):
+        x = self.bn1(self.conv1(x))
+        x = self.bn2(self.conv2(x)) + self.bn3(self.conv3(x))
+        x = self.fc2(self.fc1(x.reshape(x.shape[0], -1)))
+        return F.log_softmax(x, -1)
+
+
+def training_model(model: Module, optimizer: Optimizer, criterion: Callable, scheduler: _LRScheduler = None,
+                   max_steps: int | None = None, max_epochs: int | None = None, device: torch.device = device):
+    model.train()
+
+    # prepare data
+    MNIST(root='data/mnist', train=True, download=True)
+    transform = transforms.Compose([transforms.ToTensor(), transforms.Normalize((0.1307,), (0.3081,))])
+    mnist_train = MNIST(root='data/mnist', train=True, transform=transform)
+    train_dataloader = DataLoader(mnist_train, batch_size=32)
+
+    max_epochs = max_epochs if max_epochs else 1
+    max_steps = max_steps if max_steps else 50
+    current_steps = 0
+
+    # training
+    for _ in range(max_epochs):
+        for x, y in train_dataloader:
+            optimizer.zero_grad()
+            x, y = x.to(device), y.to(device)
+            logits = model(x)
+            loss: torch.Tensor = criterion(logits, y)
+            loss.backward()
+            optimizer.step()
+            current_steps += 1
+            if max_steps and current_steps == max_steps:
+                return
+        if scheduler is not None:
+            scheduler.step()
+
+
+def finetuning_model(model: Module):
+    optimizer = torch.optim.SGD(model.parameters(), lr=0.01, momentum=0.9, weight_decay=5e-4)
+    training_model(model, optimizer, F.nll_loss)
+
+
+def evaluating_model(model: Module, device: torch.device = device):
+    model.eval()
+
+    # prepare data
+    MNIST(root='data/mnist', train=False, download=True)
+    transform = transforms.Compose([transforms.ToTensor(), transforms.Normalize((0.1307,), (0.3081,))])
+    mnist_test = MNIST(root='data/mnist', train=False, transform=transform)
+    test_dataloader = DataLoader(mnist_test, batch_size=32)
+
+    # testing
+    correct = 0
+    with torch.no_grad():
+        for x, y in test_dataloader:
+            x, y = x.to(device), y.to(device)
+            logits = model(x)
+            preds = torch.argmax(logits, dim=1)
+            correct += preds.eq(y.view_as(preds)).sum().item()
+    return correct / len(mnist_test)

test/algo/compression/assets/utils.py

+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
+######################################################################################
+# NOTE: copy from branch wrapper-refactor, will rm this file in this or next release.#
+######################################################################################
+
+from copy import deepcopy
+import logging
+from typing import Any, Dict, List
+
+from torch.nn import Module
+
+_logger = logging.getLogger(__name__)
+
+
+def _unfold_op_partial_names(model: Module, config_list: List[Dict]) -> List[Dict]:
+    config_list = deepcopy(config_list)
+    full_op_names = [op_name for op_name, _ in model.named_modules()]
+    for config in config_list:
+        op_names = config.pop('op_names', [])
+        op_partial_names = config.pop('op_partial_names', [])
+        for op_partial_name in op_partial_names:
+            op_names.extend([op_name for op_name in full_op_names if op_partial_name in op_name])
+        config['op_names'] = list(set(op_names))
+    return config_list
+
+
+def unfold_config_list(model: Module, config_list: List[Dict]) -> Dict[str, Dict[str, Any]]:
+    '''
+    Unfold config_list to op_names level, return a config_dict {op_name: config}.
+    '''
+    config_list = _unfold_op_partial_names(model=model, config_list=config_list)
+    config_dict = {}
+    for config in config_list:
+        for key in ['op_types', 'op_names', 'exclude_op_names']:
+            config.setdefault(key, [])
+        op_names = []
+        for module_name, module in model.named_modules():
+            module_type = type(module).__name__
+            if (module_type in config['op_types'] or module_name in config['op_names']) and module_name not in config['exclude_op_names']:
+                op_names.append(module_name)
+        config_template = deepcopy(config)
+        for key in ['op_types', 'op_names', 'exclude_op_names']:
+            config_template.pop(key, [])
+        for op_name in op_names:
+            if op_name in config_dict:
+                warn_msg = f'{op_name} duplicate definition of config, replace old config:\n' + \
+                           f'{config_dict[op_name]}\n' + \
+                           f'with new config:\n{config_template}\n'
+                _logger.warning(warn_msg)
+            config_dict[op_name] = deepcopy(config_template)
+    return config_dict

test/algo/compression/v2/test_evaluator.py

@@ -3,193 +3,23 @@
 
 from __future__ import annotations
 
-from pathlib import Path
-from typing import Callable
 import pytest
 
-import pytorch_lightning as pl
-from pytorch_lightning.loggers import TensorBoardLogger
-
 import torch
-from torch.nn import Module
-import torch.nn.functional as F
-from torch.optim import Optimizer
-from torch.optim.lr_scheduler import ExponentialLR, _LRScheduler
-from torch.utils.data import random_split, DataLoader
-from torchmetrics.functional import accuracy
-from torchvision.datasets import MNIST
-from torchvision import transforms
 
-import nni
 from nni.algorithms.compression.v2.pytorch.utils.evaluator import (
-    TorchEvaluator,
-    LightningEvaluator,
     TensorHook,
     ForwardHook,
     BackwardHook,
 )
 
-
-class SimpleTorchModel(torch.nn.Module):
-    def __init__(self):
-        super().__init__()
-        self.conv1 = torch.nn.Conv2d(1, 16, 3)
-        self.bn1 = torch.nn.BatchNorm2d(16)
-        self.conv2 = torch.nn.Conv2d(16, 8, 3, groups=4)
-        self.bn2 = torch.nn.BatchNorm2d(8)
-        self.conv3 = torch.nn.Conv2d(16, 8, 3)
-        self.bn3 = torch.nn.BatchNorm2d(8)
-        self.fc1 = torch.nn.Linear(8 * 24 * 24, 100)
-        self.fc2 = torch.nn.Linear(100, 10)
-
-    def forward(self, x: torch.Tensor):
-        x = self.bn1(self.conv1(x))
-        x = self.bn2(self.conv2(x)) + self.bn3(self.conv3(x))
-        x = self.fc2(self.fc1(x.reshape(x.shape[0], -1)))
-        return F.log_softmax(x, -1)
-
-
-device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
-
-
-def training_model(model: Module, optimizer: Optimizer, criterion: Callable, scheduler: _LRScheduler,
-                   max_steps: int | None = None, max_epochs: int | None = None):
-    model.train()
-
-    # prepare data
-    data_dir = Path(__file__).parent / 'data'
-    MNIST(data_dir, train=True, download=True)
-    transform = transforms.Compose([transforms.ToTensor(), transforms.Normalize((0.1307,), (0.3081,))])
-    mnist_train = MNIST(data_dir, train=True, transform=transform)
-    train_dataloader = DataLoader(mnist_train, batch_size=32)
-
-    max_epochs = max_epochs if max_epochs else 1
-    max_steps = max_steps if max_steps else 10
-    current_steps = 0
-
-    # training
-    for _ in range(max_epochs):
-        for x, y in train_dataloader:
-            optimizer.zero_grad()
-            x, y = x.to(device), y.to(device)
-            logits = model(x)
-            loss: torch.Tensor = criterion(logits, y)
-            loss.backward()
-            optimizer.step()
-            current_steps += 1
-            if max_steps and current_steps == max_steps:
-                return
-        scheduler.step()
-
-
-def evaluating_model(model: Module):
-    model.eval()
-
-    # prepare data
-    data_dir = Path(__file__).parent / 'data'
-    MNIST(data_dir, train=False, download=True)
-    transform = transforms.Compose([transforms.ToTensor(), transforms.Normalize((0.1307,), (0.3081,))])
-    mnist_test = MNIST(data_dir, train=False, transform=transform)
-    test_dataloader = DataLoader(mnist_test, batch_size=32)
-
-    # testing
-    correct = 0
-    with torch.no_grad():
-        for x, y in test_dataloader:
-            x, y = x.to(device), y.to(device)
-            logits = model(x)
-            preds = torch.argmax(logits, dim=1)
-            correct += preds.eq(y.view_as(preds)).sum().item()
-    return correct / len(mnist_test)
-
-
-class SimpleLightningModel(pl.LightningModule):
-    def __init__(self):
-        super().__init__()
-        self.model = SimpleTorchModel()
-        self.count = 0
-
-    def forward(self, x):
-        print(self.count)
-        self.count += 1
-        return self.model(x)
-
-    def training_step(self, batch, batch_idx):
-        x, y = batch
-        logits = self(x)
-        loss = F.nll_loss(logits, y)
-        self.log("train_loss", loss)
-        return loss
-
-    def evaluate(self, batch, stage=None):
-        x, y = batch
-        logits = self(x)
-        loss = F.nll_loss(logits, y)
-        preds = torch.argmax(logits, dim=1)
-        acc = accuracy(preds, y)
-
-        if stage:
-            self.log(f"{stage}_loss", loss, prog_bar=True)
-            self.log(f"{stage}_acc", acc, prog_bar=True)
-
-    def validation_step(self, batch, batch_idx):
-        self.evaluate(batch, "val")
-
-    def test_step(self, batch, batch_idx):
-        self.evaluate(batch, "test")
-
-    def configure_optimizers(self):
-        optimizer = nni.trace(torch.optim.SGD)(
-            self.parameters(),
-            lr=0.01,
-            momentum=0.9,
-            weight_decay=5e-4,
-        )
-        scheduler_dict = {
-            "scheduler": nni.trace(ExponentialLR)(
-                optimizer,
-                0.1,
-            ),
-            "interval": "epoch",
-        }
-        return {"optimizer": optimizer, "lr_scheduler": scheduler_dict}
-
-
-class MNISTDataModule(pl.LightningDataModule):
-    def __init__(self, data_dir: str = "./"):
-        super().__init__()
-        self.data_dir = data_dir
-        self.transform = transforms.Compose([transforms.ToTensor(), transforms.Normalize((0.1307,), (0.3081,))])
-
-    def prepare_data(self):
-        # download
-        MNIST(self.data_dir, train=True, download=True)
-        MNIST(self.data_dir, train=False, download=True)
-
-    def setup(self, stage: str | None = None):
-        # Assign train/val datasets for use in dataloaders
-        if stage == "fit" or stage is None:
-            mnist_full = MNIST(self.data_dir, train=True, transform=self.transform)
-            self.mnist_train, self.mnist_val = random_split(mnist_full, [55000, 5000])
-
-        # Assign test dataset for use in dataloader(s)
-        if stage == "test" or stage is None:
-            self.mnist_test = MNIST(self.data_dir, train=False, transform=self.transform)
-
-        if stage == "predict" or stage is None:
-            self.mnist_predict = MNIST(self.data_dir, train=False, transform=self.transform)
-
-    def train_dataloader(self):
-        return DataLoader(self.mnist_train, batch_size=32)
-
-    def val_dataloader(self):
-        return DataLoader(self.mnist_val, batch_size=32)
-
-    def test_dataloader(self):
-        return DataLoader(self.mnist_test, batch_size=32)
-
-    def predict_dataloader(self):
-        return DataLoader(self.mnist_predict, batch_size=32)
+from ..assets.device import device
+from ..assets.simple_mnist import (
+    SimpleLightningModel,
+    SimpleTorchModel,
+    create_lighting_evaluator,
+    create_pytorch_evaluator
+)
 
 
 optimizer_before_step_flag = False
@@ -237,41 +67,20 @@ def assert_flags():
     assert loss_flag, 'Evaluator patch loss failed.'
 
 
-def create_lighting_evaluator():
-    pl_model = SimpleLightningModel()
-    pl_trainer = nni.trace(pl.Trainer)(
-        max_epochs=1,
-        max_steps=10,
-        logger=TensorBoardLogger(Path(__file__).parent / 'lightning_logs', name="resnet"),
-    )
-    pl_trainer.num_sanity_val_steps = 0
-    pl_data = nni.trace(MNISTDataModule)(data_dir=Path(__file__).parent / 'data')
-    evaluator = LightningEvaluator(pl_trainer, pl_data)
-    evaluator._init_optimizer_helpers(pl_model)
-    return evaluator
-
-
-def create_pytorch_evaluator():
-    model = SimpleTorchModel()
-    optimizer = nni.trace(torch.optim.SGD)(model.parameters(), lr=0.01, momentum=0.9, weight_decay=5e-4)
-    lr_scheduler = nni.trace(ExponentialLR)(optimizer, 0.1)
-    evaluator = TorchEvaluator(training_model, optimizer, F.nll_loss, lr_scheduler, evaluating_func=evaluating_model)
-    evaluator._init_optimizer_helpers(model)
-    return evaluator
-
-
 @pytest.mark.parametrize("evaluator_type", ['lightning', 'pytorch'])
 def test_evaluator(evaluator_type: str):
     if evaluator_type == 'lightning':
-        evaluator = create_lighting_evaluator()
         model = SimpleLightningModel()
+        evaluator = create_lighting_evaluator()
+        evaluator._init_optimizer_helpers(model)
         evaluator.bind_model(model)
         tensor_hook = TensorHook(model.model.conv1.weight, 'model.conv1.weight', tensor_hook_factory)
         forward_hook = ForwardHook(model.model.conv1, 'model.conv1', forward_hook_factory)
         backward_hook = BackwardHook(model.model.conv1, 'model.conv1', backward_hook_factory)
     elif evaluator_type == 'pytorch':
-        evaluator = create_pytorch_evaluator()
         model = SimpleTorchModel().to(device)
+        evaluator = create_pytorch_evaluator(model)
+        evaluator._init_optimizer_helpers(model)
         evaluator.bind_model(model)
         tensor_hook = TensorHook(model.conv1.weight, 'conv1.weight', tensor_hook_factory)
         forward_hook = ForwardHook(model.conv1, 'conv1', forward_hook_factory)
@@ -296,4 +105,4 @@ def test_evaluator(evaluator_type: str):
 
     evaluator.finetune()
     assert_flags()
-    assert all([len(hook.buffer) == 10 for hook in [tensor_hook, forward_hook, backward_hook]])
+    assert all([len(hook.buffer) == 50 for hook in [tensor_hook, forward_hook, backward_hook]])