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385 lines
14 KiB
Plaintext
385 lines
14 KiB
Plaintext
//- 💫 DOCS > USAGE > WHAT'S NEW IN V2.0
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include ../../_includes/_mixins
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p
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| We also re-wrote a large part of the documentation and usage workflows,
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| and added more examples.
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+h(2, "features") New features
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p
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| This section contains an overview of the most important
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| #[strong new features and improvements]. The #[+a("/docs/api") API docs]
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| include additional deprecation notes. New methods and functions that
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| were introduced in this version are marked with a #[+tag-new(2)] tag.
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p
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| To help you make the most of v2.0, we also
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| #[strong re-wrote almost all of the usage guides and API docs], and added
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| more real-world examples. If you're new to spaCy, or just want to brush
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| up on some NLP basics and the details of the library, check out
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| the #[+a("/docs/usage/spacy-101") spaCy 101 guide] that explains the most
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| important concepts with examples and illustrations.
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+h(3, "features-pipelines") Improved processing pipelines
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+aside-code("Example").
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# Modify an existing pipeline
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nlp = spacy.load('en')
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nlp.pipeline.append(my_component)
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# Register a factory to create a component
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spacy.set_factory('my_factory', my_factory)
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nlp = Language(pipeline=['my_factory', mycomponent])
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p
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| It's now much easier to #[strong customise the pipeline] with your own
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| components, functions that receive a #[code Doc] object, modify and
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| return it. If your component is stateful, you can define and register a
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| factory which receives the shared #[code Vocab] object and returns a
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| component. spaCy's default components can be added to your pipeline by
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| using their string IDs. This way, you won't have to worry about finding
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| and implementing them – simply add #[code "tagger"] to the pipeline,
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| and spaCy will know what to do.
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+image
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include ../../assets/img/docs/pipeline.svg
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+infobox
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| #[strong API:] #[+api("language") #[code Language]]
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| #[strong Usage:] #[+a("/docs/usage/language-processing-pipeline") Processing text]
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+h(3, "features-hash-ids") Hash values instead of integer IDs
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+aside-code("Example").
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doc = nlp(u'I love coffee')
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assert doc.vocab.strings[u'coffee'] == 3197928453018144401L
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assert doc.vocab.strings[3197928453018144401L] == u'coffee'
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doc.vocab.strings.add(u'beer')
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assert doc.vocab.strings[u'beer'] == 3073001599257881079L
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p
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| The #[+api("stringstore") #[code StringStore]] now resolves all strings
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| to hash values instead of integer IDs. This means that the string-to-int
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| mapping #[strong no longer depends on the vocabulary state], making a lot
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| of workflows much simpler, especially during training. Unlike integer IDs
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| in spaCy v1.x, hash values will #[strong always match] – even across
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| models. Strings can now be added explicitly using the new #[+api("stringstore#add") #[code Stringstore.add]] method.
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+infobox
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| #[strong API:] #[+api("stringstore") #[code StringStore]]
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| #[strong Usage:] #[+a("/docs/usage/spacy-101#vocab") Vocab, hashes and lexemes 101]
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+h(3, "features-serializer") Saving, loading and serialization
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+aside-code("Example").
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nlp = spacy.load('en') # shortcut link
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nlp = spacy.load('en_core_web_sm') # package
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nlp = spacy.load('/path/to/en') # unicode path
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nlp = spacy.load(Path('/path/to/en')) # pathlib Path
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nlp.to_disk('/path/to/nlp')
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nlp = English().from_disk('/path/to/nlp')
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p
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| spay's serialization API has been made consistent across classes and
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| objects. All container classes, i.e. #[code Language], #[code Doc],
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| #[code Vocab] and #[code StringStore] now have a #[code to_bytes()],
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| #[code from_bytes()], #[code to_disk()] and #[code from_disk()] method
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| that supports the Pickle protocol.
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p
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| The improved #[code spacy.load] makes loading models easier and more
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| transparent. You can load a model by supplying its
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| #[+a("/docs/usage/models#usage") shortcut link], the name of an installed
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| #[+a("/docs/usage/saving-loading#generating") model package] or a path.
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| The #[code Language] class to initialise will be determined based on the
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| model's settings. For a blank language, you can import the class directly,
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| e.g. #[code from spacy.lang.en import English].
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+infobox
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| #[strong API:] #[+api("spacy#load") #[code spacy.load]], #[+api("binder") #[code Binder]]
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| #[strong Usage:] #[+a("/docs/usage/saving-loading") Saving and loading]
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+h(3, "features-displacy") displaCy visualizer with Jupyter support
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+aside-code("Example").
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from spacy import displacy
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doc = nlp(u'This is a sentence about Facebook.')
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displacy.serve(doc, style='dep') # run the web server
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html = displacy.render(doc, style='ent') # generate HTML
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p
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| Our popular dependency and named entity visualizers are now an official
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| part of the spaCy library! displaCy can run a simple web server, or
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| generate raw HTML markup or SVG files to be exported. You can pass in one
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| or more docs, and customise the style. displaCy also auto-detects whether
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| you're running #[+a("https://jupyter.org") Jupyter] and will render the
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| visualizations in your notebook.
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+infobox
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| #[strong API:] #[+api("displacy") #[code displacy]]
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| #[strong Usage:] #[+a("/docs/usage/visualizers") Visualizing spaCy]
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+h(3, "features-language") Improved language data and lazy loading
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p
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| Language-specfic data now lives in its own submodule, #[code spacy.lang].
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| Languages are lazy-loaded, i.e. only loaded when you import a
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| #[code Language] class, or load a model that initialises one. This allows
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| languages to contain more custom data, e.g. lemmatizer lookup tables, or
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| complex regular expressions. The language data has also been tidied up
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| and simplified. spaCy now also supports simple lookup-based lemmatization.
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+infobox
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| #[strong API:] #[+api("language") #[code Language]]
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| #[strong Code:] #[+src(gh("spaCy", "spacy/lang")) spacy/lang]
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| #[strong Usage:] #[+a("/docs/usage/adding-languages") Adding languages]
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+h(3, "features-matcher") Revised matcher API
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+aside-code("Example").
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from spacy.matcher import Matcher
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matcher = Matcher(nlp.vocab)
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matcher.add('HEARTS', None, [{'ORTH': '❤️', 'OP': '+'}])
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assert len(matcher) == 1
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assert 'HEARTS' in matcher
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p
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| Patterns can now be added to the matcher by calling
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| #[+api("matcher-add") #[code matcher.add()]] with a match ID, an optional
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| callback function to be invoked on each match, and one or more patterns.
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| This allows you to write powerful, pattern-specific logic using only one
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| matcher. For example, you might only want to merge some entity types,
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| and set custom flags for other matched patterns.
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+infobox
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| #[strong API:] #[+api("matcher") #[code Matcher]]
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| #[strong Usage:] #[+a("/docs/usage/rule-based-matching") Rule-based matching]
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+h(3, "features-models") Neural network models for English, German, French, Spanish and multi-language NER
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+aside-code("Example", "bash").
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python -m spacy download en # default English model
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python -m spacy download de # default German model
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python -m spacy download fr # default French model
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python -m spacy download es # default Spanish model
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python -m spacy download xx_ent_web_md # multi-language NER
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+infobox
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| #[strong Details:] #[+src(gh("spacy-models")) spacy-models]
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| #[+a("/docs/api/language-models") Languages]
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| #[strong Usage:] #[+a("/docs/usage/models") Models]
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+h(2, "incompat") Backwards incompatibilities
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+table(["Old", "New"])
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+row
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+cell
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| #[code spacy.en]
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| #[code spacy.xx]
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+cell
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| #[code spacy.lang.en]
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| #[code spacy.lang.xx]
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+row
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+cell #[code spacy.orth]
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+cell #[code spacy.lang.xx.lex_attrs]
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+row
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+cell #[code cli.model]
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+cell -
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+row
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+cell #[code Language.save_to_directory]
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+cell #[+api("language#to_disk") #[code Language.to_disk]]
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+row
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+cell #[code Language.create_make_doc]
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+cell #[+api("language#attributes") #[code Language.tokenizer]]
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+row
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+cell
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| #[code Vocab.load]
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| #[code Vocab.load_lexemes]
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| #[code Vocab.load_vectors]
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| #[code Vocab.load_vectors_from_bin_loc]
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+cell
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| #[+api("vocab#from_disk") #[code Vocab.from_disk]]
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| #[+api("vocab#from_bytes") #[code Vocab.from_bytes]]
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+row
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+cell
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| #[code Vocab.dump]
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| #[code Vocab.dump_vectors]
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+cell
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| #[+api("vocab#to_disk") #[code Vocab.to_disk]]
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| #[+api("vocab#to_bytes") #[code Vocab.to_bytes]]
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+row
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+cell
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| #[code StringStore.load]
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+cell
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| #[+api("stringstore#from_disk") #[code StringStore.from_disk]]
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| #[+api("stringstore#from_bytes") #[code StringStore.from_bytes]]
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+row
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+cell
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| #[code StringStore.dump]
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+cell
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| #[+api("stringstore#to_disk") #[code StringStore.to_disk]]
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| #[+api("stringstore#to_bytes") #[code StringStore.to_bytes]]
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+row
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+cell #[code Tokenizer.load]
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+cell -
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+row
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+cell #[code Tagger.load]
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+cell
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| #[+api("tagger#from_disk") #[code Tagger.from_disk]]
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| #[+api("tagger#from_bytes") #[code Tagger.from_bytes]]
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+row
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+cell #[code DependencyParser.load]
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+cell
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| #[+api("dependencyparser#from_disk") #[code DependencyParser.from_disk]]
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| #[+api("dependencyparser#from_bytes") #[code DependencyParser.from_bytes]]
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+row
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+cell #[code EntityRecognizer.load]
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+cell
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| #[+api("entityrecognizer#from_disk") #[code EntityRecognizer.from_disk]]
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| #[+api("entityrecognizer#from_bytes") #[code EntityRecognizer.from_bytes]]
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+row
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+cell #[code Matcher.load]
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+cell -
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+row
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+cell
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| #[code Matcher.add_pattern]
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| #[code Matcher.add_entity]
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+cell #[+api("matcher#add") #[code Matcher.add]]
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+row
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+cell #[code Matcher.get_entity]
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+cell #[+api("matcher#get") #[code Matcher.get]]
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+row
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+cell #[code Matcher.has_entity]
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+cell #[+api("matcher#contains") #[code Matcher.__contains__]]
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+row
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+cell #[code Doc.read_bytes]
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+cell #[+api("binder") #[code Binder]]
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+row
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+cell #[code Token.is_ancestor_of]
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+cell #[+api("token#is_ancestor") #[code Token.is_ancestor]]
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+h(2, "migrating") Migrating from spaCy 1.x
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+list
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+item Saving, loading and serialization.
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+item Processing pipelines and language data.
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+item Adding patterns and callbacks to the matcher.
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+item Models trained with spaCy 1.x.
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+infobox("Some tips")
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| Before migrating, we strongly recommend writing a few
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| #[strong simple tests] specific to how you're using spaCy in your
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| application. This makes it easier to check whether your code requires
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| changes, and if so, which parts are affected.
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| (By the way, feel free contribute your tests to
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| #[+src(gh("spaCy", "spacy/tests")) our test suite] – this will also ensure
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| we never accidentally introduce a bug in a workflow that's
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| important to you.) If you've trained your own models, keep in mind that
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| your train and runtime inputs must match. This means you'll have to
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| #[strong retrain your models] with spaCy v2.0 to make them compatible.
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+h(3, "migrating-saving-loading") Saving, loading and serialization
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p
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| Double-check all calls to #[code spacy.load()] and make sure they don't
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| use the #[code path] keyword argument. If you're only loading in binary
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| data and not a model package that can construct its own #[code Language]
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| class and pipeline, you should now use the
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| #[+api("language#from_disk") #[code Language.from_disk()]] method.
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+code-new.
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nlp = spacy.load('/model')
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nlp = English().from_disk('/model/data')
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+code-old nlp = spacy.load('en', path='/model')
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p
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| Review all other code that writes state to disk or bytes.
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| All containers, now share the same, consistent API for saving and
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| loading. Replace saving with #[code to_disk()] or #[code to_bytes()], and
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| loading with #[code from_disk()] and #[code from_bytes()].
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+code-new.
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nlp.to_disk('/model')
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nlp.vocab.to_disk('/vocab')
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+code-old.
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nlp.save_to_directory('/model')
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nlp.vocab.dump('/vocab')
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+h(3, "migrating-strings") Strings and hash values
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+code-new.
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nlp.vocab.strings.add(u'coffee')
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nlp.vocab.strings[u'coffee'] # 3197928453018144401L
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other_nlp.vocab.strings[u'coffee'] # 3197928453018144401L
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+code-old.
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nlp.vocab.strings[u'coffee'] # 3672
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other_nlp.vocab.strings[u'coffee'] # 40259
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+h(3, "migrating-languages") Processing pipelines and language data
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p
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| If you're importing language data or #[code Language] classes, make sure
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| to change your import statements to import from #[code spacy.lang]. If
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| you've added your own custom language, it needs to be moved to
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| #[code spacy/lang/xx] and adjusted accordingly.
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+code-new from spacy.lang.en import English
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+code-old from spacy.en import English
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p
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| If you've been using custom pipeline components, check out the new
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| guide on #[+a("/docs/usage/language-processing-pipelines") processing pipelines].
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| Appending functions to the pipeline still works – but you might be able
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| to make this more convenient by registering "component factories".
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| Components of the processing pipeline can now be disabled by passing a
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| list of their names to the #[code disable] keyword argument on loading
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| or processing.
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+code-new.
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nlp = spacy.load('en', disable=['tagger', 'ner'])
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doc = nlp(u"I don't want parsed", disable=['parser'])
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+code-old.
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nlp = spacy.load('en', tagger=False, entity=False)
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doc = nlp(u"I don't want parsed", parse=False)
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+h(3, "migrating-matcher") Adding patterns and callbacks to the matcher
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p
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| If you're using the matcher, you can now add patterns in one step. This
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| should be easy to update – simply merge the ID, callback and patterns
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| into one call to #[+api("matcher#add") #[code matcher.add]].
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+code-new.
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matcher.add('GoogleNow', merge_phrases, [{ORTH: 'Google'}, {ORTH: 'Now'}])
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+code-old.
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matcher.add_entity('GoogleNow', on_match=merge_phrases)
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matcher.add_pattern('GoogleNow', [{ORTH: 'Google'}, {ORTH: 'Now'}])
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+h(3, "migrating-models") Trained models
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