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259 lines
12 KiB
Plaintext
259 lines
12 KiB
Plaintext
//- ----------------------------------
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//- 💫 DOCS > API > LANGUAGE
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//- ----------------------------------
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+section("language")
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+h(2, "language", "https://github.com/" + SOCIAL.github + "/spaCy/blob/master/spacy/language.py")
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| #[+tag class] Language
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p.
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A pipeline that transforms text strings into annotated spaCy Doc objects. Usually you'll load the Language pipeline once and pass the instance around your program.
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+code("python", "Overview").
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class Language:
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Defaults = BaseDefaults
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def __init__(self, path=True, **overrides):
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self.vocab = Vocab()
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self.tokenizer = Tokenizer()
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self.tagger = Tagger()
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self.parser = DependencyParser()
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self.entity = EntityRecognizer()
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self.make_doc = lambda text: Doc()
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self.pipeline = [self.tagger, self.parser, self.entity]
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def __call__(self, text, **toggle):
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doc = self.make_doc(text)
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for proc in self.pipeline:
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if toggle.get(process.name, True):
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process(doc)
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return doc
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def pipe(self, texts_iterator, batch_size=1000, n_threads=2, **toggle):
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docs = (self.make_doc(text) for text in texts_iterator)
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for process in self.pipeline:
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if toggle.get(process.name, True):
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docs = process.pipe(docs, batch_size=batch_size, n_threads=n_threads)
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for doc in self.docs:
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yield doc
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def end_training(self, path=None):
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return None
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class English(Language):
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class Defaults(BaseDefaults):
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pass
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class German(Language):
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class Defaults(BaseDefaults):
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pass
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+section("english-init")
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+h(3, "english-init")
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| #[+tag method] Language.__init__
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p
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| Load the pipeline. You can disable components by passing None as a value,
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| e.g. pass parser=None, vectors=None to save memory if you're not using
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| those components. You can also pass an object as the value.
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| Pass a function create_pipeline to use a custom pipeline --- see
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| the custom pipeline tutorial.
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+aside("Efficiency").
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Loading takes 10-20 seconds, and the instance consumes 2 to 3
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gigabytes of memory. Intended use is for one instance to be
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created for each language per process, but you can create more
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if you're doing something unusual. You may wish to make the
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instance a global variable or "singleton".
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+table(["Example", "Description"])
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+row
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+cell #[code nlp = English()]
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+cell Load everything, from default path.
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+row
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+cell #[code nlp = English(path='my_data')]
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+cell Load everything, from specified path
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+row
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+cell #[code nlp = English(path=path_obj)]
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+cell Load everything, from an object that follows the #[code pathlib.Path] protocol.
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+row
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+cell #[code nlp = English(parser=False, vectors=False)]
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+cell Load everything except the parser and the word vectors.
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+row
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+cell #[code nlp = English(parser=my_parser)]
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+cell Load everything, and use a custom parser.
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+row
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+cell #[code nlp = English(create_pipeline=my_pipeline)]
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+cell Load everything, and use a custom pipeline.
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+code("python", "Definition").
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def __init__(self, path=True, **overrides):
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D = self.Defaults
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self.vocab = Vocab(path=path, parent=self, **D.vocab) \
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if 'vocab' not in overrides \
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else overrides['vocab']
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self.tokenizer = Tokenizer(self.vocab, path=path, **D.tokenizer) \
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if 'tokenizer' not in overrides \
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else overrides['tokenizer']
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self.tagger = Tagger(self.vocab, path=path, **D.tagger) \
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if 'tagger' not in overrides \
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else overrides['tagger']
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self.parser = DependencyParser(self.vocab, path=path, **D.parser) \
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if 'parser' not in overrides \
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else overrides['parser']
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self.entity = EntityRecognizer(self.vocab, path=path, **D.entity) \
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if 'entity' not in overrides \
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else overrides['entity']
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self.matcher = Matcher(self.vocab, path=path, **D.matcher) \
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if 'matcher' not in overrides \
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else overrides['matcher']
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if 'make_doc' in overrides:
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self.make_doc = overrides['make_doc']
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elif 'create_make_doc' in overrides:
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self.make_doc = overrides['create_make_doc'](self)
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else:
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self.make_doc = lambda text: self.tokenizer(text)
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if 'pipeline' in overrides:
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self.pipeline = overrides['pipeline']
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elif 'create_pipeline' in overrides:
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self.pipeline = overrides['create_pipeline'](self)
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else:
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self.pipeline = [self.tagger, self.parser, self.matcher, self.entity]
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+section("language-call")
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+h(3, "language-call")
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| #[+tag method] Language.__call__
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p
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| The main entry point to spaCy. Takes raw unicode text, and returns
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| a #[code Doc] object, which can be iterated to access #[code Token]
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| and #[code Span] objects.
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+aside("Efficiency").
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spaCy's algorithms are all linear-time, so you can supply
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documents of arbitrary length, e.g. whole novels.
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+table(["Example", "Description"], "code")
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+row
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+cell #[ doc = nlp(u'Some text.')]
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+cell Apply the full pipeline.
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+row
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+cell #[ doc = nlp(u'Some text.', parse=False)]
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+cell Applies tagger and entity, not parser
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+row
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+cell #[ doc = nlp(u'Some text.', entity=False)]
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+cell Applies tagger and parser, not entity.
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+row
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+cell #[ doc = nlp(u'Some text.', tag=False)]
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+cell Does not apply tagger, entity or parser
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+row
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+cell #[ doc = nlp(u'')]
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+cell Zero-length tokens, not an error
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+row
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+cell #[ doc = nlp(b'Some text')]
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+cell Error: need unicode
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+row
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+cell #[ doc = nlp(b'Some text'.decode('utf8'))]
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+cell Decode bytes into unicode first.
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+code("python", "Definition").
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def __call__(self, text, tag=True, parse=True, entity=True, matcher=True):
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return self
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+table(["Name", "Type", "Description"])
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+row
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+cell text
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+cell #[+a(link_unicode) unicode]
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+cell.
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The text to be processed. spaCy expects raw unicode text
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– you don"t necessarily need to, say, split it into paragraphs.
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However, depending on your documents, you might be better
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off applying custom pre-processing. Non-text formatting,
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e.g. from HTML mark-up, should be removed before sending
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the document to spaCy. If your documents have a consistent
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format, you may be able to improve accuracy by pre-processing.
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For instance, if the first word of your documents are always
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in upper-case, it may be helpful to normalize them before
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supplying them to spaCy.
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+row
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+cell tag
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+cell #[+a(link_bool) bool]
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+cell.
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Whether to apply the part-of-speech tagger. Required for
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parsing and entity recognition.
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+row
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+cell parse
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+cell #[+a(link_bool) bool]
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+cell.
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Whether to apply the syntactic dependency parser.
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+row
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+cell entity
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+cell #[+a(link_bool) bool]
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+cell.
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Whether to apply the named entity recognizer.
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+section("english-pipe")
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+h(3, "english-pipe")
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| #[+tag method] English.pipe
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p
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| Parse a sequence of texts into a sequence of #[code Doc] objects.
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| Accepts a generator as input, and produces a generator as output.
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| Internally, it accumulates a buffer of #[code batch_size]
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| texts, works on them with #[code n_threads] workers in parallel,
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| and then yields the #[code Doc] objects one by one.
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+aside("Efficiency").
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spaCy releases the global interpreter lock around the parser and
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named entity recognizer, allowing shared-memory parallelism via
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OpenMP. However, OpenMP is not supported on OSX — so multiple
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threads will only be used on Linux and Windows.
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+table(["Example", "Description"], "usage")
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+row
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+cell #[+a("https://github.com/" + SOCIAL.github + "/spaCy/blob/master/examples/parallel_parse.py") parallel_parse.py]
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+cell Parse comments from Reddit in parallel.
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+code("python", "Definition").
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def pipe(self, texts, n_threads=2, batch_size=1000):
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yield Doc()
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+table(["Arg", "Type", "Description"])
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+row
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+cell texts
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+cell
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+cell.
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A sequence of unicode objects. Usually you will want this
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to be a generator, so that you don"t need to have all of
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your texts in memory.
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+row
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+cell n_threads
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+cell #[+a(link_int) int]
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+cell.
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The number of worker threads to use. If -1, OpenMP will
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decide how many to use at run time. Default is 2.
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+row
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+cell batch_size
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+cell #[+a(link_int) int]
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+cell.
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The number of texts to buffer. Let"s say you have a
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#[code batch_size] of 1,000. The input, #[code texts], is
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a generator that yields the texts one-by-one. We want to
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operate on them in parallel. So, we accumulate a work queue.
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Instead of taking one document from #[code texts] and
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operating on it, we buffer #[code batch_size] documents,
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work on them in parallel, and then yield them one-by-one.
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Higher #[code batch_size] therefore often results in better
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parallelism, up to a point.
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