zeroshot_classifier pytorch bert feature-extraction transformers sentence-transformers zero-shot-classification en dataset:claritylab/UTCD license:mit region:us
---
datasets:
- claritylab/UTCD
language:
- en
library_name: zeroshot_classifier
license: mit
metrics:
- accuracy
pipeline_tag: zero-shot-classification
tags:
- transformers
- sentence-transformers
- zeroshot_classifier
---

# Zero-shot Vanilla Bi-Encoder

This is a [sentence-transformers](https://www.SBERT.net) model. 
It was introduced in the Findings of ACL'23 Paper **Label Agnostic Pre-training for Zero-shot Text Classification** by ***Christopher Clarke, Yuzhao Heng, Yiping Kang, Krisztian Flautner, Lingjia Tang and Jason Mars***. 
The code for training and evaluating this model can be found [here](https://github.com/ChrisIsKing/zero-shot-text-classification/tree/master). 


## Model description

This model is intended for zero-shot text classification. 
It was trained under the dual encoding classification framework as a baseline with the aspect-normalized [UTCD](https://huggingface.co/datasets/claritylab/UTCD) dataset. 

- **Finetuned from model:** [`bert-base-uncased`](https://huggingface.co/bert-base-uncased)


## Usage

You can use the model like this:

```python
>>> from sentence_transformers import SentenceTransformer, util as sbert_util
>>> model = SentenceTransformer(model_name_or_path='claritylab/zero-shot-vanilla-bi-encoder')

>>> text = "I'd like to have this track onto my Classical Relaxations playlist."
>>> labels = [
>>>     'Add To Playlist', 'Book Restaurant', 'Get Weather', 'Play Music', 'Rate Book', 'Search Creative Work',
>>>     'Search Screening Event'
>>> ]

>>> text_embed = model.encode(text)
>>> label_embeds = model.encode(labels)
>>> scores = [sbert_util.cos_sim(text_embed, lb_embed).item() for lb_embed in label_embeds]
>>> print(scores)

[
  0.7219685912132263,
  -0.011121425777673721,
  0.04929959028959274,
  0.6653788089752197,
  0.07093366980552673,
  0.2897151708602905,
  0.06133288890123367
]
```

