Spaces:
Sleeping
Sleeping
jl commited on
Commit ·
b1587d0
1
Parent(s): 69200a8
update: new models and fit new models to app
Browse files- notebooks/Altered_SHIELD_Model.ipynb +0 -0
- notebooks/Reddit_Base_SHIELD_Model.ipynb +0 -0
- notebooks/combined-baseline (1).ipynb +0 -0
- notebooks/full-proposed-model.ipynb +0 -0
- src/app.py +47 -19
- src/hatespeech_model.py +172 -168
notebooks/Altered_SHIELD_Model.ipynb
DELETED
|
The diff for this file is too large to render.
See raw diff
|
|
|
notebooks/Reddit_Base_SHIELD_Model.ipynb
DELETED
|
The diff for this file is too large to render.
See raw diff
|
|
|
notebooks/combined-baseline (1).ipynb
ADDED
|
The diff for this file is too large to render.
See raw diff
|
|
|
notebooks/full-proposed-model.ipynb
ADDED
|
The diff for this file is too large to render.
See raw diff
|
|
|
src/app.py
CHANGED
|
@@ -66,8 +66,8 @@ st.markdown('<div class="sub-header">Comparing Base vs Enhanced models with expl
|
|
| 66 |
# Load both models with spinner
|
| 67 |
with st.spinner('🔄 Loading models... This may take a moment on first run.'):
|
| 68 |
try:
|
| 69 |
-
|
| 70 |
-
|
| 71 |
st.success('✅ Base Shield and Enhanced Shield models loaded successfully!')
|
| 72 |
except Exception as e:
|
| 73 |
st.error(f"❌ Error loading models: {str(e)}")
|
|
@@ -155,23 +155,32 @@ classify_button = st.button("🔍 Analyze Text", type="primary", use_container_w
|
|
| 155 |
if classify_button:
|
| 156 |
if user_input and user_input.strip():
|
| 157 |
with st.spinner('🔄 Analyzing text...'):
|
| 158 |
-
# Get prediction
|
| 159 |
-
# result = predict_hatespeech(
|
| 160 |
-
# text=user_input,
|
| 161 |
-
# rationale=optional_rationale if optional_rationale else None,
|
| 162 |
-
# model=model,
|
| 163 |
-
# tokenizer_hatebert=tokenizer_hatebert,
|
| 164 |
-
# tokenizer_rationale=tokenizer_rationale,
|
| 165 |
-
# config=config,
|
| 166 |
-
# device=device
|
| 167 |
-
# )
|
| 168 |
# Run both models
|
| 169 |
-
base_start = time.time()
|
| 170 |
-
base_model_result = predict_text_mock(user_input)
|
| 171 |
-
base_end = time.time()
|
| 172 |
enhanced_start = time.time()
|
| 173 |
-
enhanced_model_result =
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 174 |
enhanced_end = time.time()
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 175 |
|
| 176 |
# Extract results for both models
|
| 177 |
base_prediction = base_model_result['prediction']
|
|
@@ -359,9 +368,28 @@ if classify_button:
|
|
| 359 |
# Run both models on the file
|
| 360 |
# base_result = predict_hatespeech_from_file(...) # Base model
|
| 361 |
# enhanced_result = predict_hatespeech_from_file(...) # Enhanced model
|
| 362 |
-
|
| 363 |
-
|
| 364 |
-
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 365 |
st.success("✅ File analysis complete for both models!")
|
| 366 |
st.divider()
|
| 367 |
st.header("📊 Analysis Results - Model Comparison")
|
|
|
|
| 66 |
# Load both models with spinner
|
| 67 |
with st.spinner('🔄 Loading models... This may take a moment on first run.'):
|
| 68 |
try:
|
| 69 |
+
base_model, base_tokenizer_hatebert, base_tokenizer_rationale, base_config, base_device = load_cached_model("base")
|
| 70 |
+
enhanced_model, enhanced_tokenizer_hatebert, enhanced_tokenizer_rationale, enhanced_config, enhanced_device = load_cached_model("altered")
|
| 71 |
st.success('✅ Base Shield and Enhanced Shield models loaded successfully!')
|
| 72 |
except Exception as e:
|
| 73 |
st.error(f"❌ Error loading models: {str(e)}")
|
|
|
|
| 155 |
if classify_button:
|
| 156 |
if user_input and user_input.strip():
|
| 157 |
with st.spinner('🔄 Analyzing text...'):
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 158 |
# Run both models
|
|
|
|
|
|
|
|
|
|
| 159 |
enhanced_start = time.time()
|
| 160 |
+
enhanced_model_result = predict_hatespeech(
|
| 161 |
+
text=user_input,
|
| 162 |
+
rationale=optional_rationale if optional_rationale else None,
|
| 163 |
+
model=enhanced_model,
|
| 164 |
+
tokenizer_hatebert=enhanced_tokenizer_hatebert,
|
| 165 |
+
tokenizer_rationale=enhanced_tokenizer_rationale,
|
| 166 |
+
config=enhanced_config,
|
| 167 |
+
device=enhanced_device,
|
| 168 |
+
model_type="altered"
|
| 169 |
+
)
|
| 170 |
enhanced_end = time.time()
|
| 171 |
+
|
| 172 |
+
base_start = time.time()
|
| 173 |
+
base_model_result = predict_hatespeech(
|
| 174 |
+
text=user_input,
|
| 175 |
+
rationale=optional_rationale if optional_rationale else None,
|
| 176 |
+
model=base_model,
|
| 177 |
+
tokenizer_hatebert=base_tokenizer_hatebert,
|
| 178 |
+
tokenizer_rationale=base_tokenizer_rationale,
|
| 179 |
+
config=base_config,
|
| 180 |
+
device=base_device,
|
| 181 |
+
model_type="base"
|
| 182 |
+
)
|
| 183 |
+
base_end = time.time()
|
| 184 |
|
| 185 |
# Extract results for both models
|
| 186 |
base_prediction = base_model_result['prediction']
|
|
|
|
| 368 |
# Run both models on the file
|
| 369 |
# base_result = predict_hatespeech_from_file(...) # Base model
|
| 370 |
# enhanced_result = predict_hatespeech_from_file(...) # Enhanced model
|
| 371 |
+
enhanced_result = predict_hatespeech_from_file(
|
| 372 |
+
text_list=file_content['text'].tolist(),
|
| 373 |
+
rationale_list=file_content['CF_Rationales'].tolist(),
|
| 374 |
+
true_label=file_content['label'].tolist(),
|
| 375 |
+
model=enhanced_model,
|
| 376 |
+
tokenizer_hatebert=enhanced_tokenizer_hatebert,
|
| 377 |
+
tokenizer_rationale=enhanced_tokenizer_rationale,
|
| 378 |
+
config=enhanced_config,
|
| 379 |
+
device=enhanced_device,
|
| 380 |
+
model_type="altered"
|
| 381 |
+
)
|
| 382 |
+
base_result = predict_hatespeech_from_file(
|
| 383 |
+
text_list=file_content['text'].tolist(),
|
| 384 |
+
rationale_list=file_content['CF_Rationales'].tolist(),
|
| 385 |
+
true_label=file_content['label'].tolist(),
|
| 386 |
+
model=base_model,
|
| 387 |
+
tokenizer_hatebert=base_tokenizer_hatebert,
|
| 388 |
+
tokenizer_rationale=base_tokenizer_rationale,
|
| 389 |
+
config=base_config,
|
| 390 |
+
device=base_device,
|
| 391 |
+
model_type="base"
|
| 392 |
+
)
|
| 393 |
st.success("✅ File analysis complete for both models!")
|
| 394 |
st.divider()
|
| 395 |
st.header("📊 Analysis Results - Model Comparison")
|
src/hatespeech_model.py
CHANGED
|
@@ -1,5 +1,7 @@
|
|
| 1 |
from huggingface_hub import hf_hub_download
|
| 2 |
import torch
|
|
|
|
|
|
|
| 3 |
import torch.nn as nn
|
| 4 |
import json
|
| 5 |
from transformers import AutoModel, AutoTokenizer
|
|
@@ -10,61 +12,62 @@ import os
|
|
| 10 |
|
| 11 |
# Model Architecture Classes
|
| 12 |
class TemporalCNN(nn.Module):
|
| 13 |
-
def __init__(self,
|
| 14 |
super().__init__()
|
|
|
|
|
|
|
| 15 |
self.convs = nn.ModuleList([
|
| 16 |
-
nn.Conv1d(
|
|
|
|
| 17 |
])
|
| 18 |
self.dropout = nn.Dropout(dropout)
|
| 19 |
-
|
| 20 |
-
|
| 21 |
-
|
| 22 |
-
|
| 23 |
-
|
| 24 |
-
|
| 25 |
-
|
| 26 |
-
|
| 27 |
-
|
| 28 |
-
|
| 29 |
-
|
| 30 |
-
|
| 31 |
-
|
| 32 |
-
|
| 33 |
-
|
| 34 |
-
|
|
|
|
|
|
|
|
|
|
|
|
|
| 35 |
|
| 36 |
class MultiScaleAttentionCNN(nn.Module):
|
| 37 |
-
|
| 38 |
-
|
| 39 |
-
|
| 40 |
-
|
| 41 |
-
|
| 42 |
-
|
| 43 |
-
|
| 44 |
-
|
| 45 |
-
|
| 46 |
-
|
| 47 |
-
|
| 48 |
-
|
| 49 |
-
|
| 50 |
-
|
| 51 |
-
|
| 52 |
-
|
| 53 |
-
|
| 54 |
-
|
| 55 |
-
|
| 56 |
-
|
| 57 |
-
|
| 58 |
-
|
| 59 |
-
# Weighted sum pooling
|
| 60 |
-
pooled = (c_t * w).sum(dim=1) # (B, num_filters)
|
| 61 |
-
conv_outs.append(pooled)
|
| 62 |
-
out = torch.cat(conv_outs, dim=1) # (B, num_filters * len(kernel_sizes))
|
| 63 |
-
out = self.dropout(out)
|
| 64 |
-
return out
|
| 65 |
|
| 66 |
class ProjectionMLP(nn.Module):
|
| 67 |
-
def __init__(self, input_size, hidden_size, num_labels
|
| 68 |
super().__init__()
|
| 69 |
self.layers = nn.Sequential(
|
| 70 |
nn.Linear(input_size, hidden_size),
|
|
@@ -75,109 +78,95 @@ class ProjectionMLP(nn.Module):
|
|
| 75 |
def forward(self, x):
|
| 76 |
return self.layers(x)
|
| 77 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 78 |
class BaseShield(nn.Module):
|
| 79 |
"""
|
| 80 |
Simple base model that concatenates HateBERT and rationale BERT CLS embeddings
|
| 81 |
"""
|
| 82 |
-
def __init__(self, hatebert_model, additional_model, projection_mlp,
|
| 83 |
freeze_additional_model=True):
|
| 84 |
super().__init__()
|
| 85 |
self.hatebert_model = hatebert_model
|
| 86 |
self.additional_model = additional_model
|
| 87 |
self.projection_mlp = projection_mlp
|
| 88 |
-
self.
|
| 89 |
|
| 90 |
if freeze_additional_model:
|
| 91 |
for param in self.additional_model.parameters():
|
| 92 |
param.requires_grad = False
|
| 93 |
|
| 94 |
-
def forward(self, input_ids, attention_mask, additional_input_ids, additional_attention_mask
|
| 95 |
-
|
| 96 |
-
|
| 97 |
-
|
| 98 |
-
|
| 99 |
-
|
| 100 |
-
|
| 101 |
-
|
| 102 |
-
|
| 103 |
-
|
| 104 |
-
|
| 105 |
-
return_dict=True)
|
| 106 |
-
rationale_cls = add_out.last_hidden_state[:, 0, :] # (B, 768)
|
| 107 |
-
|
| 108 |
-
# Concatenate CLS embeddings: (B, 1536)
|
| 109 |
-
concat_emb = torch.cat((hatebert_cls, rationale_cls), dim=1)
|
| 110 |
-
|
| 111 |
-
# Classification
|
| 112 |
-
logits = self.projection_mlp(concat_emb)
|
| 113 |
-
|
| 114 |
-
# Return dummy rationale_probs and selector_logits for compatibility with app
|
| 115 |
-
batch_size = input_ids.size(0)
|
| 116 |
-
seq_len = input_ids.size(1)
|
| 117 |
-
dummy_rationale_probs = torch.zeros(batch_size, seq_len, device=input_ids.device)
|
| 118 |
-
dummy_selector_logits = torch.zeros(batch_size, seq_len, device=input_ids.device)
|
| 119 |
-
|
| 120 |
-
attns = hatebert_out.attentions if (return_attentions and hasattr(hatebert_out, "attentions")) else None
|
| 121 |
-
return logits, dummy_rationale_probs, dummy_selector_logits, attns
|
| 122 |
|
|
|
|
|
|
|
| 123 |
|
| 124 |
-
class
|
| 125 |
-
def __init__(self, hatebert_model, additional_model, projection_mlp,
|
| 126 |
-
gumbel_temp=0.5, freeze_additional_model=True, cnn_num_filters=128,
|
| 127 |
-
cnn_kernel_sizes=(2,3,4), cnn_dropout=0.3):
|
| 128 |
super().__init__()
|
| 129 |
self.hatebert_model = hatebert_model
|
| 130 |
self.additional_model = additional_model
|
|
|
|
|
|
|
|
|
|
| 131 |
self.projection_mlp = projection_mlp
|
| 132 |
-
|
| 133 |
-
self.hidden_size = hidden_size
|
| 134 |
-
|
| 135 |
if freeze_additional_model:
|
| 136 |
-
for
|
| 137 |
-
|
| 138 |
-
|
| 139 |
-
|
| 140 |
-
|
| 141 |
-
|
| 142 |
-
|
| 143 |
-
|
| 144 |
-
|
| 145 |
-
|
| 146 |
-
|
| 147 |
-
def gumbel_sigmoid_sample(self, logits):
|
| 148 |
-
noise = -torch.log(-torch.log(torch.rand_like(logits) + 1e-9) + 1e-9)
|
| 149 |
-
y = logits + noise
|
| 150 |
-
return torch.sigmoid(y / self.gumbel_temp)
|
| 151 |
-
|
| 152 |
-
def forward(self, input_ids, attention_mask, additional_input_ids, additional_attention_mask,
|
| 153 |
-
return_attentions=False):
|
| 154 |
-
hatebert_out = self.hatebert_model(input_ids=input_ids, attention_mask=attention_mask,
|
| 155 |
-
output_attentions=return_attentions, return_dict=True)
|
| 156 |
-
hatebert_emb = hatebert_out.last_hidden_state
|
| 157 |
-
cls_emb = hatebert_emb[:, 0, :]
|
| 158 |
-
|
| 159 |
-
with torch.no_grad():
|
| 160 |
-
add_out = self.additional_model(input_ids=additional_input_ids,
|
| 161 |
-
attention_mask=additional_attention_mask,
|
| 162 |
-
return_dict=True)
|
| 163 |
-
rationale_emb = add_out.last_hidden_state
|
| 164 |
-
|
| 165 |
-
selector_logits = self.selector(hatebert_emb).squeeze(-1)
|
| 166 |
-
rationale_probs = self.gumbel_sigmoid_sample(selector_logits)
|
| 167 |
-
rationale_probs = rationale_probs * attention_mask.float().to(rationale_probs.device)
|
| 168 |
|
| 169 |
-
|
| 170 |
-
|
| 171 |
-
pooled_rationale = masked_hidden.sum(1) / denom
|
| 172 |
|
| 173 |
-
|
| 174 |
-
|
| 175 |
|
| 176 |
-
|
| 177 |
-
|
|
|
|
| 178 |
|
| 179 |
-
|
| 180 |
-
|
|
|
|
|
|
|
| 181 |
|
| 182 |
def load_model_from_hf(model_type="altered"):
|
| 183 |
"""
|
|
@@ -187,8 +176,9 @@ def load_model_from_hf(model_type="altered"):
|
|
| 187 |
model_type: Either "altered" or "base" to choose which model to load
|
| 188 |
"""
|
| 189 |
|
|
|
|
| 190 |
repo_id = "seffyehl/BetterShield"
|
| 191 |
-
repo_type = "e5912f6e8c34a10629cfd5a7971ac71ac76d0e9d"
|
| 192 |
|
| 193 |
# Choose model and config files based on model_type
|
| 194 |
if model_type.lower() == "altered":
|
|
@@ -203,14 +193,14 @@ def load_model_from_hf(model_type="altered"):
|
|
| 203 |
# Download files
|
| 204 |
model_path = hf_hub_download(
|
| 205 |
repo_id=repo_id,
|
| 206 |
-
revision=repo_type,
|
| 207 |
filename=model_filename
|
| 208 |
)
|
| 209 |
|
| 210 |
config_path = hf_hub_download(
|
| 211 |
repo_id=repo_id,
|
| 212 |
filename=config_filename,
|
| 213 |
-
revision=repo_type
|
| 214 |
)
|
| 215 |
|
| 216 |
# Load config
|
|
@@ -246,48 +236,37 @@ def load_model_from_hf(model_type="altered"):
|
|
| 246 |
# The saved model uses 512, not what's in projection_config
|
| 247 |
adapter_dim = 512 # hardcoded to match saved weights
|
| 248 |
projection_mlp = ProjectionMLP(input_size=proj_input_dim, hidden_size=adapter_dim,
|
| 249 |
-
num_labels=2
|
| 250 |
|
| 251 |
model = BaseShield(
|
| 252 |
hatebert_model=hatebert_model,
|
| 253 |
additional_model=rationale_model,
|
| 254 |
projection_mlp=projection_mlp,
|
| 255 |
-
|
| 256 |
-
|
| 257 |
-
)
|
| 258 |
else:
|
| 259 |
-
|
| 260 |
-
|
| 261 |
-
|
| 262 |
-
|
| 263 |
-
|
| 264 |
-
|
| 265 |
-
|
| 266 |
-
|
| 267 |
-
|
| 268 |
-
|
| 269 |
-
|
| 270 |
-
|
| 271 |
-
|
| 272 |
-
|
| 273 |
-
|
| 274 |
-
|
| 275 |
-
|
| 276 |
-
|
| 277 |
-
|
| 278 |
-
|
| 279 |
-
projection_mlp=projection_mlp,
|
| 280 |
-
hidden_size=H,
|
| 281 |
-
freeze_additional_model=True,
|
| 282 |
-
cnn_num_filters=cnn_num_filters,
|
| 283 |
-
cnn_kernel_sizes=cnn_kernel_sizes,
|
| 284 |
-
cnn_dropout=cnn_dropout
|
| 285 |
-
)
|
| 286 |
-
|
| 287 |
-
model.load_state_dict(checkpoint['model_state_dict'])
|
| 288 |
model.eval()
|
| 289 |
-
|
| 290 |
-
device = 'cuda' if torch.cuda.is_available() else 'cpu'
|
| 291 |
model = model.to(device)
|
| 292 |
|
| 293 |
# Create a unified config dict with max_length at top level for compatibility
|
|
@@ -298,7 +277,7 @@ def load_model_from_hf(model_type="altered"):
|
|
| 298 |
return model, tokenizer_hatebert, tokenizer_rationale, unified_config, device
|
| 299 |
|
| 300 |
def predict_text(text, rationale, model, tokenizer_hatebert, tokenizer_rationale,
|
| 301 |
-
device='cpu', max_length=128):
|
| 302 |
"""
|
| 303 |
Predict hate speech for a given text and rationale
|
| 304 |
|
|
@@ -310,6 +289,7 @@ def predict_text(text, rationale, model, tokenizer_hatebert, tokenizer_rationale
|
|
| 310 |
tokenizer_rationale: Rationale model tokenizer
|
| 311 |
device: 'cpu' or 'cuda'
|
| 312 |
max_length: Maximum sequence length
|
|
|
|
| 313 |
|
| 314 |
Returns:
|
| 315 |
prediction: 0 or 1
|
|
@@ -342,6 +322,28 @@ def predict_text(text, rationale, model, tokenizer_hatebert, tokenizer_rationale
|
|
| 342 |
add_attention_mask = inputs_rationale['attention_mask'].to(device)
|
| 343 |
|
| 344 |
# Inference
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 345 |
with torch.no_grad():
|
| 346 |
logits, rationale_probs, selector_logits, _ = model(
|
| 347 |
input_ids,
|
|
@@ -363,7 +365,7 @@ def predict_text(text, rationale, model, tokenizer_hatebert, tokenizer_rationale
|
|
| 363 |
'tokens': tokenizer_hatebert.convert_ids_to_tokens(input_ids[0])
|
| 364 |
}
|
| 365 |
|
| 366 |
-
def predict_hatespeech_from_file(text_list, rationale_list, true_label, model, tokenizer_hatebert, tokenizer_rationale, config, device):
|
| 367 |
"""
|
| 368 |
Predict hate speech for text read from a file
|
| 369 |
|
|
@@ -400,7 +402,8 @@ def predict_hatespeech_from_file(text_list, rationale_list, true_label, model, t
|
|
| 400 |
tokenizer_hatebert=tokenizer_hatebert,
|
| 401 |
tokenizer_rationale=tokenizer_rationale,
|
| 402 |
device=device,
|
| 403 |
-
max_length=config.get('max_length', 128)
|
|
|
|
| 404 |
)
|
| 405 |
predictions.append(result['prediction'])
|
| 406 |
# Log resource usage every 10th sample and at end to reduce overhead
|
|
@@ -436,7 +439,7 @@ def predict_hatespeech_from_file(text_list, rationale_list, true_label, model, t
|
|
| 436 |
}
|
| 437 |
|
| 438 |
|
| 439 |
-
def predict_hatespeech(text, rationale, model, tokenizer_hatebert, tokenizer_rationale, config, device):
|
| 440 |
"""
|
| 441 |
Predict hate speech for given text
|
| 442 |
|
|
@@ -460,7 +463,8 @@ def predict_hatespeech(text, rationale, model, tokenizer_hatebert, tokenizer_rat
|
|
| 460 |
tokenizer_hatebert=tokenizer_hatebert,
|
| 461 |
tokenizer_rationale=tokenizer_rationale,
|
| 462 |
device=device,
|
| 463 |
-
max_length=config.get('max_length', 128)
|
|
|
|
| 464 |
)
|
| 465 |
|
| 466 |
return result
|
|
|
|
| 1 |
from huggingface_hub import hf_hub_download
|
| 2 |
import torch
|
| 3 |
+
from torch.cuda import device
|
| 4 |
+
from torch.nn import functional as F
|
| 5 |
import torch.nn as nn
|
| 6 |
import json
|
| 7 |
from transformers import AutoModel, AutoTokenizer
|
|
|
|
| 12 |
|
| 13 |
# Model Architecture Classes
|
| 14 |
class TemporalCNN(nn.Module):
|
| 15 |
+
def __init__(self, hidden_size=768, num_filters=128, kernel_sizes=(2, 3, 4), dropout=0.1, dilation_base=2):
|
| 16 |
super().__init__()
|
| 17 |
+
self.kernel_sizes = kernel_sizes
|
| 18 |
+
self.dilation_base = dilation_base
|
| 19 |
self.convs = nn.ModuleList([
|
| 20 |
+
nn.Conv1d(hidden_size, num_filters, k, dilation=dilation_base ** i, padding=0)
|
| 21 |
+
for i, k in enumerate(kernel_sizes)
|
| 22 |
])
|
| 23 |
self.dropout = nn.Dropout(dropout)
|
| 24 |
+
self.out_dim = num_filters * len(kernel_sizes)
|
| 25 |
+
|
| 26 |
+
def _causal_padding(self, x, kernel_size, dilation):
|
| 27 |
+
padding = (kernel_size - 1) * dilation
|
| 28 |
+
return F.pad(x, (padding, 0))
|
| 29 |
+
|
| 30 |
+
def forward(self, x, attention_mask):
|
| 31 |
+
mask = attention_mask.unsqueeze(-1)
|
| 32 |
+
x = x * mask
|
| 33 |
+
x = x.transpose(1, 2)
|
| 34 |
+
feats = []
|
| 35 |
+
for i, conv in enumerate(self.convs):
|
| 36 |
+
kernel_size = self.kernel_sizes[i]
|
| 37 |
+
dilation = self.dilation_base ** i
|
| 38 |
+
x_padded = self._causal_padding(x, kernel_size, dilation)
|
| 39 |
+
c = F.relu(conv(x_padded))
|
| 40 |
+
p = F.max_pool1d(c, kernel_size=c.size(2)).squeeze(2)
|
| 41 |
+
feats.append(p)
|
| 42 |
+
out = torch.cat(feats, dim=1)
|
| 43 |
+
return self.dropout(out)
|
| 44 |
|
| 45 |
class MultiScaleAttentionCNN(nn.Module):
|
| 46 |
+
def __init__(self, hidden_size=768, num_filters=128, kernel_sizes=(2, 3, 4), dropout=0.3):
|
| 47 |
+
super().__init__()
|
| 48 |
+
self.convs = nn.ModuleList([
|
| 49 |
+
nn.Conv1d(hidden_size, num_filters, k) for k in kernel_sizes
|
| 50 |
+
])
|
| 51 |
+
self.attention_fc = nn.Linear(num_filters, 1)
|
| 52 |
+
self.dropout = nn.Dropout(dropout)
|
| 53 |
+
self.out_dim = num_filters * len(kernel_sizes)
|
| 54 |
+
|
| 55 |
+
def forward(self, x, mask):
|
| 56 |
+
x = x.transpose(1, 2)
|
| 57 |
+
feats = []
|
| 58 |
+
for conv in self.convs:
|
| 59 |
+
h = F.relu(conv(x))
|
| 60 |
+
h = h.transpose(1, 2)
|
| 61 |
+
attn = self.attention_fc(h).squeeze(-1)
|
| 62 |
+
attn = attn.masked_fill(mask[:, :attn.size(1)] == 0, -1e9)
|
| 63 |
+
alpha = F.softmax(attn, dim=1)
|
| 64 |
+
pooled = torch.sum(h * alpha.unsqueeze(-1), dim=1)
|
| 65 |
+
feats.append(pooled)
|
| 66 |
+
out = torch.cat(feats, dim=1)
|
| 67 |
+
return self.dropout(out)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 68 |
|
| 69 |
class ProjectionMLP(nn.Module):
|
| 70 |
+
def __init__(self, input_size, hidden_size, num_labels):
|
| 71 |
super().__init__()
|
| 72 |
self.layers = nn.Sequential(
|
| 73 |
nn.Linear(input_size, hidden_size),
|
|
|
|
| 78 |
def forward(self, x):
|
| 79 |
return self.layers(x)
|
| 80 |
|
| 81 |
+
class GumbelTokenSelector(nn.Module):
|
| 82 |
+
def __init__(self, hidden_size, tau=1.0):
|
| 83 |
+
super().__init__()
|
| 84 |
+
self.tau = tau
|
| 85 |
+
self.proj = nn.Linear(hidden_size * 2, 1)
|
| 86 |
+
|
| 87 |
+
def forward(self, token_embeddings, cls_embedding, training=True):
|
| 88 |
+
B, L, H = token_embeddings.size()
|
| 89 |
+
cls_exp = cls_embedding.unsqueeze(1).expand(-1, L, -1)
|
| 90 |
+
x = torch.cat([token_embeddings, cls_exp], dim=-1)
|
| 91 |
+
logits = self.proj(x).squeeze(-1)
|
| 92 |
+
|
| 93 |
+
if training:
|
| 94 |
+
probs = F.gumbel_softmax(
|
| 95 |
+
torch.stack([logits, torch.zeros_like(logits)], dim=-1),
|
| 96 |
+
tau=self.tau,
|
| 97 |
+
hard=False
|
| 98 |
+
)[..., 0]
|
| 99 |
+
else:
|
| 100 |
+
probs = torch.sigmoid(logits)
|
| 101 |
+
return probs, logits
|
| 102 |
+
|
| 103 |
class BaseShield(nn.Module):
|
| 104 |
"""
|
| 105 |
Simple base model that concatenates HateBERT and rationale BERT CLS embeddings
|
| 106 |
"""
|
| 107 |
+
def __init__(self, hatebert_model, additional_model, projection_mlp, device='cpu',
|
| 108 |
freeze_additional_model=True):
|
| 109 |
super().__init__()
|
| 110 |
self.hatebert_model = hatebert_model
|
| 111 |
self.additional_model = additional_model
|
| 112 |
self.projection_mlp = projection_mlp
|
| 113 |
+
self.device = device
|
| 114 |
|
| 115 |
if freeze_additional_model:
|
| 116 |
for param in self.additional_model.parameters():
|
| 117 |
param.requires_grad = False
|
| 118 |
|
| 119 |
+
def forward(self, input_ids, attention_mask, additional_input_ids, additional_attention_mask):
|
| 120 |
+
hatebert_outputs = self.hatebert_model(input_ids=input_ids, attention_mask=attention_mask)
|
| 121 |
+
hatebert_embeddings = hatebert_outputs.last_hidden_state[:, 0, :]
|
| 122 |
+
hatebert_embeddings = torch.nn.LayerNorm(hatebert_embeddings.size()[1:]).to(self.device)(hatebert_embeddings.to(self.device)).to(self.device)
|
| 123 |
+
|
| 124 |
+
additional_outputs = self.additional_model(input_ids=additional_input_ids, attention_mask=additional_attention_mask)
|
| 125 |
+
additional_embeddings = additional_outputs.last_hidden_state[:, 0, :]
|
| 126 |
+
additional_embeddings = torch.nn.LayerNorm(additional_embeddings.size()[1:]).to(self.device)(additional_embeddings.to(self.device)).to(self.device)
|
| 127 |
+
|
| 128 |
+
concatenated_embeddings = torch.cat((hatebert_embeddings, additional_embeddings), dim=1).to(self.device)
|
| 129 |
+
projected_embeddings = self.projection_mlp(concatenated_embeddings).to(self.device)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 130 |
|
| 131 |
+
# Return 4 values to match ConcatModel interface (rationale_probs, selector_logits, attentions are None)
|
| 132 |
+
return projected_embeddings
|
| 133 |
|
| 134 |
+
class ConcatModel(nn.Module):
|
| 135 |
+
def __init__(self, hatebert_model, additional_model, temporal_cnn, msa_cnn, selector, projection_mlp, freeze_additional_model=True, freeze_hatebert=True):
|
|
|
|
|
|
|
| 136 |
super().__init__()
|
| 137 |
self.hatebert_model = hatebert_model
|
| 138 |
self.additional_model = additional_model
|
| 139 |
+
self.temporal_cnn = temporal_cnn
|
| 140 |
+
self.msa_cnn = msa_cnn
|
| 141 |
+
self.selector = selector
|
| 142 |
self.projection_mlp = projection_mlp
|
| 143 |
+
|
|
|
|
|
|
|
| 144 |
if freeze_additional_model:
|
| 145 |
+
for p in self.additional_model.parameters():
|
| 146 |
+
p.requires_grad = False
|
| 147 |
+
if freeze_hatebert:
|
| 148 |
+
for p in self.hatebert_model.parameters():
|
| 149 |
+
p.requires_grad = False
|
| 150 |
+
|
| 151 |
+
def forward(self, input_ids, attention_mask, additional_input_ids, additional_attention_mask):
|
| 152 |
+
hate_outputs = self.hatebert_model(input_ids=input_ids, attention_mask=attention_mask)
|
| 153 |
+
seq_emb = hate_outputs.last_hidden_state
|
| 154 |
+
cls_emb = seq_emb[:, 0, :]
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 155 |
|
| 156 |
+
token_probs, token_logits = self.selector(seq_emb, cls_emb, self.training)
|
| 157 |
+
temporal_feat = self.temporal_cnn(seq_emb, attention_mask)
|
|
|
|
| 158 |
|
| 159 |
+
weights = token_probs.unsqueeze(-1)
|
| 160 |
+
H_r = (seq_emb * weights).sum(dim=1) / (weights.sum(dim=1) + 1e-6)
|
| 161 |
|
| 162 |
+
with torch.no_grad():
|
| 163 |
+
add_outputs = self.additional_model(input_ids=additional_input_ids, attention_mask=additional_attention_mask)
|
| 164 |
+
add_seq = add_outputs.last_hidden_state
|
| 165 |
|
| 166 |
+
msa_feat = self.msa_cnn(add_seq, additional_attention_mask)
|
| 167 |
+
concat = torch.cat([cls_emb, temporal_feat, msa_feat, H_r], dim=1)
|
| 168 |
+
logits = self.projection_mlp(concat)
|
| 169 |
+
return logits, token_probs, token_logits, hate_outputs.attentions if hasattr(hate_outputs, "attentions") else None
|
| 170 |
|
| 171 |
def load_model_from_hf(model_type="altered"):
|
| 172 |
"""
|
|
|
|
| 176 |
model_type: Either "altered" or "base" to choose which model to load
|
| 177 |
"""
|
| 178 |
|
| 179 |
+
device = 'cuda' if torch.cuda.is_available() else 'cpu'
|
| 180 |
repo_id = "seffyehl/BetterShield"
|
| 181 |
+
# repo_type = "e5912f6e8c34a10629cfd5a7971ac71ac76d0e9d"
|
| 182 |
|
| 183 |
# Choose model and config files based on model_type
|
| 184 |
if model_type.lower() == "altered":
|
|
|
|
| 193 |
# Download files
|
| 194 |
model_path = hf_hub_download(
|
| 195 |
repo_id=repo_id,
|
| 196 |
+
# revision=repo_type,
|
| 197 |
filename=model_filename
|
| 198 |
)
|
| 199 |
|
| 200 |
config_path = hf_hub_download(
|
| 201 |
repo_id=repo_id,
|
| 202 |
filename=config_filename,
|
| 203 |
+
# revision=repo_type
|
| 204 |
)
|
| 205 |
|
| 206 |
# Load config
|
|
|
|
| 236 |
# The saved model uses 512, not what's in projection_config
|
| 237 |
adapter_dim = 512 # hardcoded to match saved weights
|
| 238 |
projection_mlp = ProjectionMLP(input_size=proj_input_dim, hidden_size=adapter_dim,
|
| 239 |
+
num_labels=2)
|
| 240 |
|
| 241 |
model = BaseShield(
|
| 242 |
hatebert_model=hatebert_model,
|
| 243 |
additional_model=rationale_model,
|
| 244 |
projection_mlp=projection_mlp,
|
| 245 |
+
freeze_additional_model=True,
|
| 246 |
+
device=device
|
| 247 |
+
).to(device)
|
| 248 |
else:
|
| 249 |
+
temporal_cnn = TemporalCNN(hidden_size=768, num_filters=128, kernel_sizes=(2, 3, 4)).to(device)
|
| 250 |
+
msa_cnn = MultiScaleAttentionCNN(hidden_size=768, num_filters=128, kernel_sizes=(2, 3, 4)).to(device)
|
| 251 |
+
selector = GumbelTokenSelector(hidden_size=768, tau=1.0).to(device)
|
| 252 |
+
projection_mlp = ProjectionMLP(input_size=temporal_cnn.out_dim + msa_cnn.out_dim + 768 * 2, hidden_size=512, num_labels=2).to(device)
|
| 253 |
+
model = ConcatModel(
|
| 254 |
+
hatebert_model=hatebert_model,
|
| 255 |
+
additional_model=rationale_model,
|
| 256 |
+
temporal_cnn=temporal_cnn,
|
| 257 |
+
msa_cnn=msa_cnn,
|
| 258 |
+
selector=selector,
|
| 259 |
+
projection_mlp=projection_mlp,
|
| 260 |
+
freeze_additional_model=True,
|
| 261 |
+
freeze_hatebert=True).to(device)
|
| 262 |
+
|
| 263 |
+
if isinstance(checkpoint, dict) and 'model_state_dict' in checkpoint:
|
| 264 |
+
model.load_state_dict(checkpoint['model_state_dict'])
|
| 265 |
+
print(f"Loaded checkpoint from epoch {checkpoint.get('epoch', 'unknown')}")
|
| 266 |
+
print(f"Dataset: {checkpoint.get('dataset', 'unknown')}, Seed: {checkpoint.get('seed', 'unknown')}")
|
| 267 |
+
else:
|
| 268 |
+
model.load_state_dict(checkpoint)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 269 |
model.eval()
|
|
|
|
|
|
|
| 270 |
model = model.to(device)
|
| 271 |
|
| 272 |
# Create a unified config dict with max_length at top level for compatibility
|
|
|
|
| 277 |
return model, tokenizer_hatebert, tokenizer_rationale, unified_config, device
|
| 278 |
|
| 279 |
def predict_text(text, rationale, model, tokenizer_hatebert, tokenizer_rationale,
|
| 280 |
+
device='cpu', max_length=128, model_type="altered"):
|
| 281 |
"""
|
| 282 |
Predict hate speech for a given text and rationale
|
| 283 |
|
|
|
|
| 289 |
tokenizer_rationale: Rationale model tokenizer
|
| 290 |
device: 'cpu' or 'cuda'
|
| 291 |
max_length: Maximum sequence length
|
| 292 |
+
model_type: Either "altered" or "base" to determine how to process inputs
|
| 293 |
|
| 294 |
Returns:
|
| 295 |
prediction: 0 or 1
|
|
|
|
| 322 |
add_attention_mask = inputs_rationale['attention_mask'].to(device)
|
| 323 |
|
| 324 |
# Inference
|
| 325 |
+
if model_type.lower() == "base":
|
| 326 |
+
with torch.no_grad():
|
| 327 |
+
logits = model(
|
| 328 |
+
input_ids,
|
| 329 |
+
attention_mask,
|
| 330 |
+
add_input_ids,
|
| 331 |
+
add_attention_mask
|
| 332 |
+
)
|
| 333 |
+
|
| 334 |
+
# Get probabilities
|
| 335 |
+
probs = torch.softmax(logits, dim=1)
|
| 336 |
+
prediction = logits.argmax(dim=1).item()
|
| 337 |
+
confidence = probs[0, prediction].item()
|
| 338 |
+
|
| 339 |
+
return {
|
| 340 |
+
'prediction': prediction,
|
| 341 |
+
'confidence': confidence,
|
| 342 |
+
'probabilities': probs[0].cpu().numpy(),
|
| 343 |
+
'rationale_scores': None, # Base model does not produce token-level rationale scores
|
| 344 |
+
'tokens': tokenizer_hatebert.convert_ids_to_tokens(input_ids[0])
|
| 345 |
+
}
|
| 346 |
+
|
| 347 |
with torch.no_grad():
|
| 348 |
logits, rationale_probs, selector_logits, _ = model(
|
| 349 |
input_ids,
|
|
|
|
| 365 |
'tokens': tokenizer_hatebert.convert_ids_to_tokens(input_ids[0])
|
| 366 |
}
|
| 367 |
|
| 368 |
+
def predict_hatespeech_from_file(text_list, rationale_list, true_label, model, tokenizer_hatebert, tokenizer_rationale, config, device, model_type="altered"):
|
| 369 |
"""
|
| 370 |
Predict hate speech for text read from a file
|
| 371 |
|
|
|
|
| 402 |
tokenizer_hatebert=tokenizer_hatebert,
|
| 403 |
tokenizer_rationale=tokenizer_rationale,
|
| 404 |
device=device,
|
| 405 |
+
max_length=config.get('max_length', 128),
|
| 406 |
+
model_type=model_type
|
| 407 |
)
|
| 408 |
predictions.append(result['prediction'])
|
| 409 |
# Log resource usage every 10th sample and at end to reduce overhead
|
|
|
|
| 439 |
}
|
| 440 |
|
| 441 |
|
| 442 |
+
def predict_hatespeech(text, rationale, model, tokenizer_hatebert, tokenizer_rationale, config, device, model_type="altered"):
|
| 443 |
"""
|
| 444 |
Predict hate speech for given text
|
| 445 |
|
|
|
|
| 463 |
tokenizer_hatebert=tokenizer_hatebert,
|
| 464 |
tokenizer_rationale=tokenizer_rationale,
|
| 465 |
device=device,
|
| 466 |
+
max_length=config.get('max_length', 128),
|
| 467 |
+
model_type=model_type
|
| 468 |
)
|
| 469 |
|
| 470 |
return result
|