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README.md
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library_name: transformers
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language:
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pipeline_tag: zero-shot-classification
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---
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# Tiny-Toxic-Detector
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A paper on this model is being released soon.
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### Usage
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This model uses custom architecture and requires some extra custom code to work. Below you can find
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```python
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import torch
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import torch.nn as nn
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from transformers import PreTrainedModel, PretrainedConfig, AutoTokenizer
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from huggingface_hub import login
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import os
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# Define TinyTransformer model
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class TinyTransformer(nn.Module):
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if __name__ == "__main__":
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main()
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```
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library_name: transformers
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language:
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- en
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---
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# Tiny-Toxic-Detector
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A paper on this model is being released soon.
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### Benchmarks
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The Tiny-Toxic-Detector achieves an impressive 90.26% on the Toxigen benchmark and 87.34% on the Jigsaw-Toxic-Comment-Classification-Challenge. Here we compare our results against other toxic classification models:
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| Model | Size (parameters) | Toxigen (%) | Jigsaw (%) |
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| --------------------------------- | ----------------- | ----------- | ---------- |
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| lmsys/toxicchat-t5-large-v1.0 | 738M | 72.67 | 88.82 |
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| s-nlp/roberta toxicity classifier | 124M | 88.41 | 94.92 |
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| unitary/toxic-bert | 109M | 49.50 | 89.70 |
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| mohsenfayyaz/toxicity-classifier | 109M | 81.50 | 83.31 |
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| martin-ha/toxic-comment-model | 67M | 68.02 | 91.56 |
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| Tiny-toxic-detector | 2M | 90.26 | 87.34 |
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### Usage
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This model uses custom architecture and requires some extra custom code to work. Below you can find the architecture and a fully-usable example.
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<details>
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<summary>
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Architecture
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</summary>
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```python
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import torch
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import torch.nn as nn
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from transformers import PreTrainedModel, PretrainedConfig, AutoTokenizer
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# Define TinyTransformer model
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class TinyTransformer(nn.Module):
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def __init__(self, vocab_size, embed_dim, num_heads, ff_dim, num_layers):
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super().__init__()
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self.embedding = nn.Embedding(vocab_size, embed_dim)
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self.pos_encoding = nn.Parameter(torch.zeros(1, 512, embed_dim))
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encoder_layer = nn.TransformerEncoderLayer(d_model=embed_dim, nhead=num_heads, dim_feedforward=ff_dim, batch_first=True)
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self.transformer = nn.TransformerEncoder(encoder_layer, num_layers=num_layers)
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self.fc = nn.Linear(embed_dim, 1)
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self.sigmoid = nn.Sigmoid()
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def forward(self, x):
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x = self.embedding(x) + self.pos_encoding[:, :x.size(1), :]
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x = self.transformer(x)
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x = x.mean(dim=1) # Global average pooling
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x = self.fc(x)
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return self.sigmoid(x)
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class TinyTransformerConfig(PretrainedConfig):
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model_type = "tiny_transformer"
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def __init__(self, vocab_size=30522, embed_dim=64, num_heads=2, ff_dim=128, num_layers=4, max_position_embeddings=512, **kwargs):
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super().__init__(**kwargs)
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self.vocab_size = vocab_size
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self.embed_dim = embed_dim
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self.num_heads = num_heads
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self.ff_dim = ff_dim
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self.num_layers = num_layers
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self.max_position_embeddings = max_position_embeddings
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class TinyTransformerForSequenceClassification(PreTrainedModel):
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config_class = TinyTransformerConfig
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def __init__(self, config):
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super().__init__(config)
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self.num_labels = 1
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self.transformer = TinyTransformer(
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config.vocab_size,
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config.embed_dim,
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config.num_heads,
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config.ff_dim,
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config.num_layers
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)
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def forward(self, input_ids, attention_mask=None):
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outputs = self.transformer(input_ids)
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return {"logits": outputs}
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```
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</details>
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<details>
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<summary>
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Full example
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</summary>
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```python
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import torch
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import torch.nn as nn
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from transformers import PreTrainedModel, PretrainedConfig, AutoTokenizer
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# Define TinyTransformer model
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class TinyTransformer(nn.Module):
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if __name__ == "__main__":
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main()
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```
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</details>
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Please note that to predict toxicity you can use the following example:
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```python
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inputs = tokenizer(text, return_tensors="pt", truncation=True, max_length=128, padding="max_length").to(device)
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if "token_type_ids" in inputs:
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del inputs["token_type_ids"]
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with torch.no_grad():
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outputs = model(**inputs)
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logits = outputs["logits"].squeeze()
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prediction = "Toxic" if logits > 0.5 else "Not Toxic"
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```
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