spacy-experimental: Cutting-edge experimental spaCy components and features

This package includes experimental components and features for spaCy v3.x, for example model architectures, pipeline components and utilities.

Installation

Install with pip:

python -m pip install -U pip setuptools wheel
python -m pip install spacy-experimental

Using spacy-experimental

Components and features may be modified or removed in any release, so always specify the exact version as a package requirement if you're experimenting with a particular component, e.g.:

spacy-experimental==0.147.0

Then you can add the experimental components to your config or import from spacy_experimental:

[components.experimental_edit_tree_lemmatizer]
factory = "experimental_edit_tree_lemmatizer"

Components

Edit tree lemmatizer

[components.experimental_edit_tree_lemmatizer]
factory = "experimental_edit_tree_lemmatizer"
# token attr to use as backoff with the predicted trees are not applicable; null to leave unset
backoff = "orth"
# prune trees that are applied less than this frequency in the training data
min_tree_freq = 2
# whether to overwrite existing lemma annotation
overwrite = false
scorer = {"@scorers":"spacy.lemmatizer_scorer.v1"}
# try to apply at most the k most probable edit trees
top_k = 1

Trainable character-based tokenizers

Two trainable tokenizers represent tokenization as a sequence tagging problem over individual characters and use the existing spaCy tagger and NER architectures to perform the tagging.

In the spaCy pipeline, a simple "pretokenizer" is applied as the pipeline tokenizer to split each doc into individual characters and the trainable tokenizer is a pipeline component that retokenizes the doc. The pretokenizer needs to be configured manually in the config or with spacy.blank():

nlp = spacy.blank(
    "en",
    config={
        "nlp": {
            "tokenizer": {"@tokenizers": "spacy-experimental.char_pretokenizer.v1"}
        }
    },
)

The two tokenizers currently reset any existing tag or entity annotation respectively in the process of retokenizing.

Character-based tagger tokenizer

In the tagger version experimental_char_tagger_tokenizer, the tagging problem is represented internally with character-level tags for token start (T), token internal (I), and outside a token (O). This representation comes from Elephant: Sequence Labeling for Word and Sentence Segmentation (Evang et al., 2013).

This is a sentence.
TIIIOTIOTOTIIIIIIIT

With the option annotate_sents, S replaces T for the first token in each sentence and the component predicts both token and sentence boundaries.

This is a sentence.
SIIIOTIOTOTIIIIIIIT

A config excerpt for experimental_char_tagger_tokenizer:

[nlp]
pipeline = ["experimental_char_tagger_tokenizer"]
tokenizer = {"@tokenizers":"spacy-experimental.char_pretokenizer.v1"}

[components]

[components.experimental_char_tagger_tokenizer]
factory = "experimental_char_tagger_tokenizer"
annotate_sents = true
scorer = {"@scorers":"spacy-experimental.tokenizer_senter_scorer.v1"}

[components.experimental_char_tagger_tokenizer.model]
@architectures = "spacy.Tagger.v1"
nO = null

[components.experimental_char_tagger_tokenizer.model.tok2vec]
@architectures = "spacy.Tok2Vec.v2"

[components.experimental_char_tagger_tokenizer.model.tok2vec.embed]
@architectures = "spacy.MultiHashEmbed.v2"
width = 128
attrs = ["ORTH","LOWER","IS_DIGIT","IS_ALPHA","IS_SPACE","IS_PUNCT"]
rows = [1000,500,50,50,50,50]
include_static_vectors = false

[components.experimental_char_tagger_tokenizer.model.tok2vec.encode]
@architectures = "spacy.MaxoutWindowEncoder.v2"
width = 128
depth = 4
window_size = 4
maxout_pieces = 2

Character-based NER tokenizer

In the NER version, each character in a token is part of an entity:

T	B-TOKEN
h	I-TOKEN
i	I-TOKEN
s	I-TOKEN
 	O
i	B-TOKEN
s	I-TOKEN
	O
a	B-TOKEN
 	O
s	B-TOKEN
e	I-TOKEN
n	I-TOKEN
t	I-TOKEN
e	I-TOKEN
n	I-TOKEN
c	I-TOKEN
e	I-TOKEN
.	B-TOKEN

A config excerpt for experimental_char_ner_tokenizer:

[nlp]
pipeline = ["experimental_char_ner_tokenizer"]
tokenizer = {"@tokenizers":"spacy-experimental.char_pretokenizer.v1"}

[components]

[components.experimental_char_ner_tokenizer]
factory = "experimental_char_ner_tokenizer"
scorer = {"@scorers":"spacy-experimental.tokenizer_scorer.v1"}

[components.experimental_char_ner_tokenizer.model]
@architectures = "spacy.TransitionBasedParser.v2"
state_type = "ner"
extra_state_tokens = false
hidden_width = 64
maxout_pieces = 2
use_upper = true
nO = null

[components.experimental_char_ner_tokenizer.model.tok2vec]
@architectures = "spacy.Tok2Vec.v2"

[components.experimental_char_ner_tokenizer.model.tok2vec.embed]
@architectures = "spacy.MultiHashEmbed.v2"
width = 128
attrs = ["ORTH","LOWER","IS_DIGIT","IS_ALPHA","IS_SPACE","IS_PUNCT"]
rows = [1000,500,50,50,50,50]
include_static_vectors = false

[components.experimental_char_ner_tokenizer.model.tok2vec.encode]
@architectures = "spacy.MaxoutWindowEncoder.v2"
width = 128
depth = 4
window_size = 4
maxout_pieces = 2

The NER version does not currently support sentence boundaries, but it would be easy to extend using a B-SENT entity type.

Biaffine parser

A biaffine dependency parser, similar to that proposed in [Deep Biaffine Attention for Neural Dependency Parsing](Deep Biaffine Attention for Neural Dependency Parsing) (Dozat & Manning, 2016). The parser consists of two parts: an edge predicter and an edge labeler. For example:

[components.experimental_arc_predicter]
factory = "experimental_arc_predicter"

[components.experimental_arc_labeler]
factory = "experimental_arc_labeler"

The arc predicter requires that a previous component (such as senter) sets sentence boundaries during training. Therefore, such a component must be added to annotating_components:

[training]
annotating_components = ["senter"]

The biaffine parser sample project provides an example biaffine parser pipeline.

Architectures

None currently.

Other

Tokenizers

spacy-experimental.char_pretokenizer.v1: Tokenize a text into individual characters.

Scorers

spacy-experimental.tokenizer_scorer.v1: Score tokenization.
spacy-experimental.tokenizer_senter_scorer.v1: Score tokenization and sentence segmentation.

Bug reports and issues

Please report bugs in the spaCy issue tracker or open a new thread on the discussion board for other issues.

Older documentation

See the READMEs in earlier tagged versions for details about components in earlier releases.

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spacy-experimental 0.4.0

spacy-experimental: Cutting-edge experimental spaCy components and features

Installation

Using spacy-experimental

Components

Edit tree lemmatizer

Trainable character-based tokenizers

Character-based tagger tokenizer

Character-based NER tokenizer

Biaffine parser

Architectures

Other

Tokenizers

Scorers

Bug reports and issues

Older documentation

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1 maintainer

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