spaCy/website/docs/api/scorer.md

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---
title: Scorer
teaser: Compute evaluation scores
tag: class
source: spacy/scorer.py
---
The `Scorer` computes and stores evaluation scores. It's typically created by
[`Language.evaluate`](/api/language#evaluate).
## Scorer.\_\_init\_\_ {#init tag="method"}
Create a new `Scorer`.
> #### Example
>
> ```python
> from spacy.scorer import Scorer
>
> scorer = Scorer()
> ```
| Name | Type | Description |
| ------------ | -------- | ------------------------------------------------------------ |
| `eval_punct` | bool | Evaluate the dependency attachments to and from punctuation. |
| **RETURNS** | `Scorer` | The newly created object. |
## Scorer.score {#score tag="method"}
Update the evaluation scores from a single [`Doc`](/api/doc) /
[`GoldParse`](/api/goldparse) pair.
> #### Example
>
> ```python
> scorer = Scorer()
> scorer.score(doc, gold)
> ```
| Name | Type | Description |
| -------------- | ----------- | -------------------------------------------------------------------------------------------------------------------- |
| `doc` | `Doc` | The predicted annotations. |
| `gold` | `GoldParse` | The correct annotations. |
| `verbose` | bool | Print debugging information. |
| `punct_labels` | tuple | Dependency labels for punctuation. Used to evaluate dependency attachments to punctuation if `eval_punct` is `True`. |
## Properties
| Name | Type | Description |
| ----------- | ----- | -------------------------------------------------------------------------------------------- |
| `token_acc` | float | Tokenization accuracy. |
| `tags_acc` | float | Part-of-speech tag accuracy (fine grained tags, i.e. `Token.tag`). |
| `uas` | float | Unlabelled dependency score. |
| `las` | float | Labelled dependency score. |
| `ents_p` | float | Named entity accuracy (precision). |
| `ents_r` | float | Named entity accuracy (recall). |
| `ents_f` | float | Named entity accuracy (F-score). |
| `scores` | dict | All scores with keys `uas`, `las`, `ents_p`, `ents_r`, `ents_f`, `tags_acc` and `token_acc`. |