[P0] Initiate the support of FSDP training (#205)

pyvene/models/intervenable_base.py

@@ -90,7 +90,8 @@ def __init__(self, config, model, backend, **kwargs):
         # mapping between supported abstract type and module name.
         ###
         self.representations = {}
-        self.interventions = {}
+        self.interventions = torch.nn.ModuleDict({})
+        self.intervention_hooks = {}
         self._key_collision_counter = {}
         self.return_collect_activations = False
         # Flags and counters below are for interventions in the model.generate
@@ -116,6 +117,7 @@ def __init__(self, config, model, backend, **kwargs):
             config.representations
         ):
             _key = self._get_representation_key(representation)
+            print(f"Intervention key: {_key}")
 
             if representation.intervention is not None:
                 intervention = representation.intervention
@@ -164,7 +166,11 @@ def __init__(self, config, model, backend, **kwargs):
                 model, representation, backend
             )
             self.representations[_key] = representation
-            self.interventions[_key] = (intervention, module_hook)
+            if isinstance(intervention, types.FunctionType):
+                self.interventions[_key] = LambdaIntervention(intervention)
+            else:
+                self.interventions[_key] = intervention
+            self.intervention_hooks[_key] = module_hook
             self._key_getter_call_counter[
                 _key
             ] = 0  # we memo how many the hook is called,
@@ -266,11 +272,13 @@ def _get_representation_key(self, representation):
         c = representation.component
         u = representation.unit
         n = representation.max_number_of_units
+        _u = u.replace(".", "_") # this will need internal functions to be changed as well.
         if "." in c:
+            _c = c.replace(".", "_")
             # string access for sure
-            key_proposal = f"comp.{c}.unit.{u}.nunit.{n}"
+            key_proposal = f"comp_{_c}_unit_{_u}_nunit_{n}"
         else:
-            key_proposal = f"layer.{l}.comp.{c}.unit.{u}.nunit.{n}"
+            key_proposal = f"layer_{l}_comp_{c}_unit_{_u}_nunit_{n}"
         if key_proposal not in self._key_collision_counter:
             self._key_collision_counter[key_proposal] = 0
         else:
@@ -283,8 +291,8 @@ def get_trainable_parameters(self):
         """
         ret_params = []
         for k, v in self.interventions.items():
-            if isinstance(v[0], TrainableIntervention):
-                ret_params += [p for p in v[0].parameters()]
+            if isinstance(v, TrainableIntervention):
+                ret_params += [p for p in v.parameters()]
         for p in self.model.parameters():
             if p.requires_grad:
                 ret_params += [p]
@@ -296,8 +304,8 @@ def named_parameters(self, recurse=True):
         """
         ret_params = []
         for k, v in self.interventions.items():
-            if isinstance(v[0], TrainableIntervention):
-                ret_params += [(k + '.' + n, p) for n, p in v[0].named_parameters()]
+            if isinstance(v, TrainableIntervention):
+                ret_params += [(k + '.' + n, p) for n, p in v.named_parameters()]
         for n, p in self.model.named_parameters():
             if p.requires_grad:
                 ret_params += [('model.' + n, p)]
@@ -320,9 +328,9 @@ def set_temperature(self, temp: torch.Tensor):
         Set temperature if needed
         """
         for k, v in self.interventions.items():
-            if isinstance(v[0], BoundlessRotatedSpaceIntervention) or \
-                isinstance(v[0], SigmoidMaskIntervention):
-                v[0].set_temperature(temp)
+            if isinstance(v, BoundlessRotatedSpaceIntervention) or \
+                isinstance(v, SigmoidMaskIntervention):
+                v.set_temperature(temp)
 
     def enable_model_gradients(self):
         """
@@ -356,7 +364,7 @@ def set_device(self, device, set_model=True):
         Set device of interventions and the model
         """
         for k, v in self.interventions.items():
-            v[0].to(device)
+            v.to(device)
         if set_model:
             self.model.to(device)
 
@@ -373,13 +381,13 @@ def count_parameters(self, include_model=False):
         _linked_key_set = set([])
         total_parameters = 0
         for k, v in self.interventions.items():
-            if isinstance(v[0], TrainableIntervention):
+            if isinstance(v, TrainableIntervention):
                 if k in self._intervention_reverse_link:
                     if not self._intervention_reverse_link[k] in _linked_key_set:
                         _linked_key_set.add(self._intervention_reverse_link[k])
-                        total_parameters += count_parameters(v[0])
+                        total_parameters += count_parameters(v)
                 else:
-                    total_parameters += count_parameters(v[0])
+                    total_parameters += count_parameters(v)
         if include_model:
             total_parameters += sum(
                 p.numel() for p in self.model.parameters() if p.requires_grad)
@@ -390,16 +398,16 @@ def set_zero_grad(self):
         Set device of interventions and the model
         """
         for k, v in self.interventions.items():
-            if isinstance(v[0], TrainableIntervention):
-                v[0].zero_grad()
+            if isinstance(v, TrainableIntervention):
+                v.zero_grad()
 
     def zero_grad(self):
         """
         The above, but for HuggingFace.
         """
         for k, v in self.interventions.items():
-            if isinstance(v[0], TrainableIntervention):
-                v[0].zero_grad()
+            if isinstance(v, TrainableIntervention):
+                v.zero_grad()
 
     def _input_validation(
         self,
@@ -758,7 +766,8 @@ def _intervention_getter(
         """
         handlers = []
         for key_i, key in enumerate(keys):
-            intervention, (module_hook, hook_type) = self.interventions[key]
+            intervention = self.interventions[key]
+            (module_hook, hook_type) = self.intervention_hooks[key]
             if self._is_generation:
                 raise NotImplementedError("Generation is not implemented for ndif backend")
 
@@ -803,7 +812,8 @@ def _intervention_setter(
         self._tidy_stateful_activations()
 
         for key_i, key in enumerate(keys):
-            intervention, (module_hook, hook_type) = self.interventions[key]
+            intervention = self.interventions[key]
+            (module_hook, hook_type) = self.intervention_hooks[key]
             if unit_locations_base[0] is not None:
                 self._batched_setter_activation_select[key] = [
                     0 for _ in range(len(unit_locations_base[0]))
@@ -846,7 +856,7 @@ def _intervention_setter(
                 # no-op to the output
 
             else:
-                if not isinstance(self.interventions[key][0], types.FunctionType):
+                if not isinstance(self.interventions[key], LambdaIntervention):
                     if intervention.is_source_constant:
                         intervened_representation = do_intervention(
                             selected_output,
@@ -944,8 +954,8 @@ def _sync_forward_with_parallel_intervention(
                 for key in keys:
                     # skip in case smart jump
                     if key in self.activations or \
-                        isinstance(self.interventions[key][0], types.FunctionType) or \
-                        self.interventions[key][0].is_source_constant:
+                        isinstance(self.interventions[key], LambdaIntervention) or \
+                        self.interventions[key].is_source_constant:
                         self._intervention_setter(
                             [key],
                             [
@@ -1056,7 +1066,7 @@ def forward(
             if self.return_collect_activations:
                 for key in self.sorted_keys:
                     if isinstance(
-                        self.interventions[key][0],
+                        self.interventions[key],
                         CollectIntervention
                     ):
                         collected_activations += self.activations[key].clone()
@@ -1191,7 +1201,7 @@ def save(
             serialized_representations
 
         for k, v in self.interventions.items():
-            intervention = v[0]
+            intervention = v
             saving_config.intervention_types += [str(type(intervention))]
             binary_filename = f"intkey_{k}.bin"
             # save intervention binary file
@@ -1288,7 +1298,7 @@ def load(
 
         # load binary files
         for i, (k, v) in enumerate(intervenable.interventions.items()):
-            intervention = v[0]
+            intervention = v
             binary_filename = f"intkey_{k}.bin"
             intervention.is_source_constant = \
                 saving_config.intervention_constant_sources[i]
@@ -1334,7 +1344,7 @@ def save_intervention(self, save_directory, include_model=True):
 
         # save binary files
         for k, v in self.interventions.items():
-            intervention = v[0]
+            intervention = v
             binary_filename = f"intkey_{k}.bin"
             # save intervention binary file
             if isinstance(intervention, TrainableIntervention):
@@ -1357,7 +1367,7 @@ def load_intervention(self, load_directory, include_model=True):
         """
         # load binary files
         for i, (k, v) in enumerate(self.interventions.items()):
-            intervention = v[0]
+            intervention = v
             binary_filename = f"intkey_{k}.bin"
             if isinstance(intervention, TrainableIntervention):
                 saved_state_dict = torch.load(os.path.join(load_directory, binary_filename))
@@ -1379,7 +1389,8 @@ def _intervention_getter(
         """
         handlers = []
         for key_i, key in enumerate(keys):
-            intervention, module_hook = self.interventions[key]
+            intervention = self.interventions[key]
+            module_hook = self.intervention_hooks[key]
 
             def hook_callback(model, args, kwargs, output=None):
                 if self._is_generation:
@@ -1524,7 +1535,8 @@ def _intervention_setter(
 
         handlers = []
         for key_i, key in enumerate(keys):
-            intervention, module_hook = self.interventions[key]
+            intervention = self.interventions[key]
+            module_hook = self.intervention_hooks[key]
             if unit_locations_base[0] is not None:
                 self._batched_setter_activation_select[key] = [
                     0 for _ in range(len(unit_locations_base[0]))
@@ -1570,7 +1582,7 @@ def hook_callback(model, args, kwargs, output=None):
                     # no-op to the output
 
                 else:
-                    if not isinstance(self.interventions[key][0], types.FunctionType):
+                    if not isinstance(self.interventions[key], LambdaIntervention):
                         if intervention.is_source_constant:
                             raw_intervened_representation = do_intervention(
                                 selected_output,
@@ -1710,8 +1722,8 @@ def _wait_for_forward_with_parallel_intervention(
             for key in keys:
                 # skip in case smart jump
                 if key in self.activations or \
-                    isinstance(self.interventions[key][0], types.FunctionType) or \
-                    self.interventions[key][0].is_source_constant:
+                    isinstance(self.interventions[key], LambdaIntervention) or \
+                    self.interventions[key].is_source_constant:
                     set_handlers = self._intervention_setter(
                         [key],
                         [
@@ -1780,8 +1792,8 @@ def _wait_for_forward_with_serial_intervention(
             for key in keys:
                 # skip in case smart jump
                 if key in self.activations or \
-                    isinstance(self.interventions[key][0], types.FunctionType) or \
-                    self.interventions[key][0].is_source_constant:
+                    isinstance(self.interventions[key], LambdaIntervention) or \
+                    self.interventions[key].is_source_constant:
                     # set with intervened activation to source_i+1
                     set_handlers = self._intervention_setter(
                         [key],
@@ -1947,7 +1959,7 @@ def forward(
             if self.return_collect_activations:
                 for key in self.sorted_keys:
                     if isinstance(
-                        self.interventions[key][0],
+                        self.interventions[key],
                         CollectIntervention
                     ):
                         collected_activations += self.activations[key]
@@ -2081,7 +2093,7 @@ def generate(
             if self.return_collect_activations:
                 for key in self.sorted_keys:
                     if isinstance(
-                        self.interventions[key][0],
+                        self.interventions[key],
                         CollectIntervention
                     ):
                         collected_activations += self.activations[key]

pyvene/models/modeling_utils.py

@@ -6,6 +6,21 @@
 from .constants import *
 
 
+class LambdaIntervention(torch.nn.Module):
+    """
+    A generic wrapper to turn any Python callable (e.g. a lambda) 
+    into an nn.Module. This does *not* automatically turn external 
+    Tensors into parameters or buffers—it's just a functional wrapper.
+    """
+    def __init__(self, func):
+        super().__init__()
+        self.func = func  # store the lambda or any callable
+
+    def forward(self, *args, **kwargs):
+        # Simply call the stored function
+        return self.func(*args, **kwargs)
+
+
 def get_internal_model_type(model):
     """Return the model type."""
     return type(model)
@@ -435,7 +450,7 @@ def do_intervention(
 ):
     """Do the actual intervention."""
 
-    if isinstance(intervention, types.FunctionType):
+    if isinstance(intervention, LambdaIntervention):
         if subspaces is None:
             return intervention(base_representation, source_representation)
         else:

pyvene_101.ipynb

@@ -2715,7 +2715,7 @@
     "# zero-out grads\n",
     "_ = pv_gpt2.model.eval()\n",
     "for k, v in pv_gpt2.interventions.items():\n",
-    "    v[0].zero_grad()\n",
+    "    v.zero_grad()\n",
     "\n",
     "original_outputs, counterfactual_outputs = pv_gpt2(\n",
     "    base, \n",

setup.py

@@ -10,7 +10,7 @@
 
 setup(
     name="pyvene",
-    version="0.1.6",
+    version="0.1.7dev",
     description="Use Activation Intervention to Interpret Causal Mechanism of Model",
     long_description=long_description,
     long_description_content_type='text/markdown',

tests/integration_tests/ComplexInterventionWithGPT2TestCase.py

@@ -119,11 +119,8 @@ def _test_subspace_partition_in_forward(self, intervention_type):
             RotatedSpaceIntervention,
             LowRankRotatedSpaceIntervention,
         }:
-            list(fast.interventions.values())[0][
-                0
-            ].rotate_layer.weight = list(intervenable.interventions.values())[0][
-                0
-            ].rotate_layer.weight
+            list(fast.interventions.values())[0].rotate_layer.weight = \
+                list(intervenable.interventions.values())[0].rotate_layer.weight
 
         _, without_partition_our_output = fast(
             base,

tests/integration_tests/InterventionWithGPT2TestCase.py

@@ -89,7 +89,7 @@ def _test_with_head_position_intervention(
             intervention_types=intervention_type,
         )
         intervenable = IntervenableModel(config, self.gpt2)
-        intervention = list(intervenable.interventions.values())[0][0]
+        intervention = list(intervenable.interventions.values())[0]
 
         base_activations = {}
         source_activations = {}

tests/integration_tests/InterventionWithLlamaTestCase.py

@@ -88,7 +88,7 @@ def _test_with_head_position_intervention(
             intervention_types=intervention_type,
         )
         intervenable = IntervenableModel(config, self.llama)
-        intervention = list(intervenable.interventions.values())[0][0]
+        intervention = list(intervenable.interventions.values())[0]
 
         base_activations = {}
         source_activations = {}

tutorials/advanced_tutorials/Boundless_DAS.ipynb

@@ -422,8 +422,8 @@
     "warm_up_steps = 0.1 * t_total\n",
     "optimizer_params = []\n",
     "for k, v in intervenable.interventions.items():\n",
-    "    optimizer_params += [{\"params\": v[0].rotate_layer.parameters()}]\n",
-    "    optimizer_params += [{\"params\": v[0].intervention_boundaries, \"lr\": 1e-2}]\n",
+    "    optimizer_params += [{\"params\": v.rotate_layer.parameters()}]\n",
+    "    optimizer_params += [{\"params\": v.intervention_boundaries, \"lr\": 1e-2}]\n",
     "optimizer = torch.optim.Adam(optimizer_params, lr=1e-3)\n",
     "scheduler = get_linear_schedule_with_warmup(\n",
     "    optimizer, num_warmup_steps=warm_up_steps, num_training_steps=t_total\n",
@@ -470,7 +470,7 @@
     "    loss = loss_fct(shift_logits, shift_labels)\n",
     "\n",
     "    for k, v in intervenable.interventions.items():\n",
-    "        boundary_loss = 1.0 * v[0].intervention_boundaries.sum()\n",
+    "        boundary_loss = 1.0 * v.intervention_boundaries.sum()\n",
     "    loss += boundary_loss\n",
     "\n",
     "    return loss"

tutorials/advanced_tutorials/DAS_Main_Introduction.ipynb

@@ -1438,7 +1438,7 @@
     "t_total = int(len(dataset) * epochs)\n",
     "optimizer_params = []\n",
     "for k, v in intervenable.interventions.items():\n",
-    "    optimizer_params += [{\"params\": v[0].rotate_layer.parameters()}]\n",
+    "    optimizer_params += [{\"params\": v.rotate_layer.parameters()}]\n",
     "    break\n",
     "optimizer = torch.optim.Adam(optimizer_params, lr=0.001)\n",
     "\n",