mirror of https://github.com/explosion/spaCy.git
97 lines
4.4 KiB
Markdown
97 lines
4.4 KiB
Markdown
---
|
||
title: Corpus
|
||
teaser: An annotated corpus
|
||
tag: class
|
||
source: spacy/gold/corpus.py
|
||
new: 3
|
||
---
|
||
|
||
This class manages annotated corpora and can be used for training and
|
||
development datasets in the [DocBin](/api/docbin) (`.spacy`) format. To
|
||
customize the data loading during training, you can register your own
|
||
[data readers and batchers](/usage/training#custom-code-readers-batchers).
|
||
|
||
## Config and implementation {#config}
|
||
|
||
`spacy.Corpus.v1` is a registered function that creates a `Corpus` of training
|
||
or evaluation data. It takes the same arguments as the `Corpus` class and
|
||
returns a callable that yields [`Example`](/api/example) objects. You can
|
||
replace it with your own registered function in the
|
||
[`@readers` registry](/api/top-level#registry) to customize the data loading and
|
||
streaming.
|
||
|
||
> #### Example config
|
||
>
|
||
> ```ini
|
||
> [paths]
|
||
> train = "corpus/train.spacy"
|
||
>
|
||
> [training.train_corpus]
|
||
> @readers = "spacy.Corpus.v1"
|
||
> path = ${paths.train}
|
||
> gold_preproc = false
|
||
> max_length = 0
|
||
> limit = 0
|
||
> ```
|
||
|
||
| Name | Description |
|
||
| --------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------- |
|
||
| `path` | The directory or filename to read from. Expects data in spaCy's binary [`.spacy` format](/api/data-formats#binary-training). ~~Path~~ |
|
||
| `gold_preproc` | Whether to set up the Example object with gold-standard sentences and tokens for the predictions. See [`Corpus`](/api/corpus#init) for details. ~~bool~~ |
|
||
| `max_length` | Maximum document length. Longer documents will be split into sentences, if sentence boundaries are available. Defaults to `0` for no limit. ~~int~~ |
|
||
| `limit` | Limit corpus to a subset of examples, e.g. for debugging. Defaults to `0` for no limit. ~~int~~ |
|
||
|
||
```python
|
||
https://github.com/explosion/spaCy/blob/develop/spacy/gold/corpus.py
|
||
```
|
||
|
||
## Corpus.\_\_init\_\_ {#init tag="method"}
|
||
|
||
Create a `Corpus` for iterating [Example](/api/example) objects from a file or
|
||
directory of [`.spacy` data files](/api/data-formats#binary-training). The
|
||
`gold_preproc` setting lets you specify whether to set up the `Example` object
|
||
with gold-standard sentences and tokens for the predictions. Gold preprocessing
|
||
helps the annotations align to the tokenization, and may result in sequences of
|
||
more consistent length. However, it may reduce runtime accuracy due to
|
||
train/test skew.
|
||
|
||
> #### Example
|
||
>
|
||
> ```python
|
||
> from spacy.gold import Corpus
|
||
>
|
||
> # With a single file
|
||
> corpus = Corpus("./data/train.spacy")
|
||
>
|
||
> # With a directory
|
||
> corpus = Corpus("./data", limit=10)
|
||
> ```
|
||
|
||
| Name | Description |
|
||
| --------------- | --------------------------------------------------------------------------------------------------------------------------------------------------- |
|
||
| `path` | The directory or filename to read from. ~~Union[str, Path]~~ |
|
||
| _keyword-only_ | |
|
||
| `gold_preproc` | Whether to set up the Example object with gold-standard sentences and tokens for the predictions. Defaults to `False`. ~~bool~~ |
|
||
| `max_length` | Maximum document length. Longer documents will be split into sentences, if sentence boundaries are available. Defaults to `0` for no limit. ~~int~~ |
|
||
| `limit` | Limit corpus to a subset of examples, e.g. for debugging. Defaults to `0` for no limit. ~~int~~ |
|
||
|
||
## Corpus.\_\_call\_\_ {#call tag="method"}
|
||
|
||
Yield examples from the data.
|
||
|
||
> #### Example
|
||
>
|
||
> ```python
|
||
> from spacy.gold import Corpus
|
||
> import spacy
|
||
>
|
||
> corpus = Corpus("./train.spacy")
|
||
> nlp = spacy.blank("en")
|
||
> train_data = corpus(nlp)
|
||
> ```
|
||
|
||
| Name | Description |
|
||
| ---------- | -------------------------------------- |
|
||
| `nlp` | The current `nlp` object. ~~Language~~ |
|
||
| **YIELDS** | The examples. ~~Example~~ |
|