---
license: apache-2.0
language:
- en
tags:
- metric
- scoring
- implicit_langauge
- implicitness
- linguistic
---
This repo contains a trained metric, **ImpScore**, which is trained on 112,580 sentence pairs using contrastive learning.
It calculates an implicitness score ranging from [0, 2] for an English input sentence. **A higher score indicates greater implicitness**. Additionally, it can calculate the pragmatic distance between two input sentences, with the distance value ranging from [0, ∞). **A higher distance means the two sentences differ more in their intended meaning**.

The training code for this metric is available on Github: [https://github.com/audreycs/ImpScore](https://github.com/audreycs/ImpScore)

<br>

# Download ImpScore:
Since the model is fully customized, you need to download the model file first to use it.

### Method 1: Dynamic loading
```python
from huggingface_hub import hf_hub_download


repo_id = "audreyeleven/ImpScore"

# Download the model python file
model_path = hf_hub_download(repo_id=repo_id, filename="impscore.py")

# Load the model dynamically
import importlib.util
spec = importlib.util.spec_from_file_location("ModelClass", model_path)
model_module = importlib.util.module_from_spec(spec)
spec.loader.exec_module(model_module)

model = model_module.ImpModel.from_pretrained(repo_id)

device = "cuda"  # or "cpu"
model.device = device
model.to(device)

model.eval()
```

### Method 2: Local loading
You can also download the model python file into your local and import it.
```python
from impscore import ImpModel
model = ImpModel.from_pretrained(repo_id)

device = "cuda"  # or "cpu"
model.device = device
model.to(device)

model.eval()
```

<br>

# Use This Metric
### Calculating implicitness score for single sentence
The metric has the `.infer(sentence)` function which takes a single sentence as the input, and returns 
- its implicitness score
- implicit embedding
- pragmatic embedding
  
```python
# test inference

imp_score, imp_embedding, prag_embedding = model.infer("I have to leave now. Talk to you later.")
print(imp_score, imp_embedding, prag_embedding)
imp_score, imp_embedding, prag_embedding = model.infer("I can't believe we've talked for so long.")
print(imp_score, imp_embedding, prag_embedding)
```
The outputs:
```
tensor(0.6709, device='cuda:0', grad_fn=<RsubBackward1>) tensor([ 0.0458, -0.0149, -0.0182, -0.0905,  0.0541, -0.0133, ...])
tensor(1.0984, device='cuda:0', grad_fn=<RsubBackward1>) tensor([-0.0086, -0.1357, -0.0067, -0.0513, -0.0225,  0.0664, ...])
```
This means the second sentence *"I can't believe we've talked for so long."* is more implicit.

### Calculating implicitness score and pragmatic distance for sentence pairs
The `.infer_pairs(sent_batch1, sent_batch2)` function takes pairs of sentences as input, and calculates 
- their individual implicitness score
- their pragmatic distance

`sent_batch1` is the list of the first sentence in each pair, and `sent_batch2` is the list of the second sentence in each pair.
  
```python
sentence_batch = [
    ["I have to leave now. Talk to you later.", "I can't believe we've talked for so long."],
    ["You must find a new place and move out by the end of this month.", "Maybe exploring other housing options could benefit us both?"]
]
s1 = sentence_batch[:][0]
s2 = sentence_batch[:][1]
imp_score1, imp_score2, prag_distance = model.infer_pairs(s1, s2)
print(imp_score1, imp_score2, prag_distance)
```

The output is:
```
tensor([0.6709, 0.9273]) tensor([1.0984, 1.3642]) tensor([0.6660, 0.7115])
```
Which means the implicit score for 
- *"I have to leave now. Talk to you later."* is 0.6709
- *"I can't believe we've talked for so long."* is 1.0984
- and the pragmatic distance between *"I have to leave now. Talk to you later."* and *"I can't believe we've talked for so long."* is 0.6660