mirror of https://github.com/explosion/spaCy.git
890 lines
23 KiB
Plaintext
890 lines
23 KiB
Plaintext
//- 💫 DOCS > API > TOKEN
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include ../_includes/_mixins
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p An individual token — i.e. a word, punctuation symbol, whitespace, etc.
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+h(2, "init") Token.__init__
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+tag method
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p Construct a #[code Token] object.
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+aside-code("Example").
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doc = nlp(u'Give it back! He pleaded.')
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token = doc[0]
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assert token.text == u'Give'
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+table(["Name", "Type", "Description"])
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+row
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+cell #[code vocab]
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+cell #[code Vocab]
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+cell A storage container for lexical types.
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+row
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+cell #[code doc]
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+cell #[code Doc]
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+cell The parent document.
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+row
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+cell #[code offset]
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+cell int
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+cell The index of the token within the document.
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+row("foot")
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+cell returns
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+cell #[code Token]
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+cell The newly constructed object.
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+h(2, "len") Token.__len__
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+tag method
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p The number of unicode characters in the token, i.e. #[code token.text].
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+aside-code("Example").
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doc = nlp(u'Give it back! He pleaded.')
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token = doc[0]
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assert len(token) == 4
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+table(["Name", "Type", "Description"])
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+row("foot")
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+cell returns
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+cell int
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+cell The number of unicode characters in the token.
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+h(2, "set_extension") Token.set_extension
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+tag classmethod
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+tag-new(2)
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p
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| Define a custom attribute on the #[code Token] which becomes available
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| via #[code Token._]. For details, see the documentation on
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| #[+a("/usage/processing-pipelines#custom-components-attributes") custom attributes].
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+aside-code("Example").
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from spacy.tokens import Token
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fruit_getter = lambda token: token.text in ('apple', 'pear', 'banana')
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Token.set_extension('is_fruit', getter=fruit_getter)
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doc = nlp(u'I have an apple')
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assert doc[3]._.is_fruit
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+table(["Name", "Type", "Description"])
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+row
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+cell #[code name]
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+cell unicode
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+cell
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| Name of the attribute to set by the extension. For example,
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| #[code 'my_attr'] will be available as #[code token._.my_attr].
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+row
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+cell #[code default]
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+cell -
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+cell
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| Optional default value of the attribute if no getter or method
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| is defined.
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+row
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+cell #[code method]
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+cell callable
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+cell
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| Set a custom method on the object, for example
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| #[code token._.compare(other_token)].
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+row
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+cell #[code getter]
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+cell callable
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+cell
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| Getter function that takes the object and returns an attribute
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| value. Is called when the user accesses the #[code ._] attribute.
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+row
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+cell #[code setter]
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+cell callable
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+cell
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| Setter function that takes the #[code Token] and a value, and
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| modifies the object. Is called when the user writes to the
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| #[code Token._] attribute.
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+h(2, "get_extension") Token.get_extension
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+tag classmethod
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+tag-new(2)
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p
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| Look up a previously registered extension by name. Returns a 4-tuple
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| #[code.u-break (default, method, getter, setter)] if the extension is
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| registered. Raises a #[code KeyError] otherwise.
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+aside-code("Example").
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from spacy.tokens import Token
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Token.set_extension('is_fruit', default=False)
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extension = Token.get_extension('is_fruit')
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assert extension == (False, None, None, None)
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+table(["Name", "Type", "Description"])
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+row
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+cell #[code name]
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+cell unicode
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+cell Name of the extension.
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+row("foot")
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+cell returns
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+cell tuple
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+cell
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| A #[code.u-break (default, method, getter, setter)] tuple of the
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| extension.
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+h(2, "has_extension") Token.has_extension
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+tag classmethod
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+tag-new(2)
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p Check whether an extension has been registered on the #[code Token] class.
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+aside-code("Example").
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from spacy.tokens import Token
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Token.set_extension('is_fruit', default=False)
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assert Token.has_extension('is_fruit')
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+table(["Name", "Type", "Description"])
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+row
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+cell #[code name]
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+cell unicode
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+cell Name of the extension to check.
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+row("foot")
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+cell returns
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+cell bool
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+cell Whether the extension has been registered.
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+h(2, "remove_extension") Token.remove_extension
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+tag classmethod
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+tag-new("2.0.11")
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p Remove a previously registered extension.
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+aside-code("Example").
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from spacy.tokens import Token
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Token.set_extension('is_fruit', default=False)
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removed = Token.remove_extension('is_fruit')
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assert not Token.has_extension('is_fruit')
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+table(["Name", "Type", "Description"])
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+row
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+cell #[code name]
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+cell unicode
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+cell Name of the extension.
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+row("foot")
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+cell returns
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+cell tuple
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+cell
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| A #[code.u-break (default, method, getter, setter)] tuple of the
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| removed extension.
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+h(2, "check_flag") Token.check_flag
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+tag method
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p Check the value of a boolean flag.
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+aside-code("Example").
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from spacy.attrs import IS_TITLE
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doc = nlp(u'Give it back! He pleaded.')
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token = doc[0]
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assert token.check_flag(IS_TITLE) == True
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+table(["Name", "Type", "Description"])
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+row
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+cell #[code flag_id]
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+cell int
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+cell The attribute ID of the flag to check.
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+row("foot")
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+cell returns
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+cell bool
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+cell Whether the flag is set.
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+h(2, "similarity") Token.similarity
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+tag method
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+tag-model("vectors")
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p Compute a semantic similarity estimate. Defaults to cosine over vectors.
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+aside-code("Example").
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apples, _, oranges = nlp(u'apples and oranges')
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apples_oranges = apples.similarity(oranges)
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oranges_apples = oranges.similarity(apples)
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assert apples_oranges == oranges_apples
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+table(["Name", "Type", "Description"])
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+row
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+cell other
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+cell -
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+cell
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| The object to compare with. By default, accepts #[code Doc],
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| #[code Span], #[code Token] and #[code Lexeme] objects.
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+row("foot")
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+cell returns
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+cell float
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+cell A scalar similarity score. Higher is more similar.
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+h(2, "nbor") Token.nbor
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+tag method
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p Get a neighboring token.
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+aside-code("Example").
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doc = nlp(u'Give it back! He pleaded.')
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give_nbor = doc[0].nbor()
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assert give_nbor.text == u'it'
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+table(["Name", "Type", "Description"])
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+row
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+cell #[code i]
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+cell int
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+cell The relative position of the token to get. Defaults to #[code 1].
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+row("foot")
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+cell returns
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+cell #[code Token]
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+cell The token at position #[code self.doc[self.i+i]].
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+h(2, "is_ancestor") Token.is_ancestor
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+tag method
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+tag-model("parse")
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p
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| Check whether this token is a parent, grandparent, etc. of another
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| in the dependency tree.
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+aside-code("Example").
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doc = nlp(u'Give it back! He pleaded.')
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give = doc[0]
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it = doc[1]
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assert give.is_ancestor(it)
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+table(["Name", "Type", "Description"])
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+row
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+cell descendant
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+cell #[code Token]
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+cell Another token.
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+row("foot")
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+cell returns
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+cell bool
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+cell Whether this token is the ancestor of the descendant.
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+h(2, "ancestors") Token.ancestors
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+tag property
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+tag-model("parse")
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p The rightmost token of this token's syntactic descendants.
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+aside-code("Example").
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doc = nlp(u'Give it back! He pleaded.')
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it_ancestors = doc[1].ancestors
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assert [t.text for t in it_ancestors] == [u'Give']
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he_ancestors = doc[4].ancestors
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assert [t.text for t in he_ancestors] == [u'pleaded']
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+table(["Name", "Type", "Description"])
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+row("foot")
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+cell yields
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+cell #[code Token]
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+cell
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| A sequence of ancestor tokens such that
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| #[code ancestor.is_ancestor(self)].
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+h(2, "conjuncts") Token.conjuncts
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+tag property
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+tag-model("parse")
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p A sequence of coordinated tokens, including the token itself.
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+aside-code("Example").
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doc = nlp(u'I like apples and oranges')
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apples_conjuncts = doc[2].conjuncts
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assert [t.text for t in apples_conjuncts] == [u'oranges']
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+table(["Name", "Type", "Description"])
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+row("foot")
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+cell yields
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+cell #[code Token]
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+cell A coordinated token.
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+h(2, "children") Token.children
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+tag property
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+tag-model("parse")
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p A sequence of the token's immediate syntactic children.
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+aside-code("Example").
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doc = nlp(u'Give it back! He pleaded.')
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give_children = doc[0].children
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assert [t.text for t in give_children] == [u'it', u'back', u'!']
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+table(["Name", "Type", "Description"])
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+row("foot")
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+cell yields
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+cell #[code Token]
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+cell A child token such that #[code child.head==self].
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+h(2, "lefts") Token.lefts
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+tag property
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+tag-model("parse")
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p
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| The leftward immediate children of the word, in the syntactic dependency
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| parse.
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+aside-code("Example").
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doc = nlp(u'I like New York in Autumn.')
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lefts = [t.text for t in doc[3].lefts]
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assert lefts == [u'New']
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+table(["Name", "Type", "Description"])
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+row("foot")
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+cell yields
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+cell #[code Token]
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+cell A left-child of the token.
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+h(2, "rights") Token.rights
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+tag property
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+tag-model("parse")
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p
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| The rightward immediate children of the word, in the syntactic
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| dependency parse.
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+aside-code("Example").
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doc = nlp(u'I like New York in Autumn.')
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rights = [t.text for t in doc[3].rights]
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assert rights == [u'in']
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+table(["Name", "Type", "Description"])
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+row("foot")
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+cell yields
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+cell #[code Token]
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+cell A right-child of the token.
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+h(2, "n_lefts") Token.n_lefts
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+tag property
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+tag-model("parse")
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p
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| The number of leftward immediate children of the word, in the syntactic
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| dependency parse.
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+aside-code("Example").
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doc = nlp(u'I like New York in Autumn.')
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assert doc[3].n_lefts == 1
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+table(["Name", "Type", "Description"])
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+row("foot")
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+cell returns
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+cell int
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+cell The number of left-child tokens.
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+h(2, "n_rights") Token.n_rights
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+tag property
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+tag-model("parse")
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p
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| The number of rightward immediate children of the word, in the syntactic
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| dependency parse.
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+aside-code("Example").
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doc = nlp(u'I like New York in Autumn.')
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assert doc[3].n_rights == 1
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+table(["Name", "Type", "Description"])
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+row("foot")
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+cell returns
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+cell int
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+cell The number of right-child tokens.
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+h(2, "subtree") Token.subtree
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+tag property
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+tag-model("parse")
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p A sequence of all the token's syntactic descendants.
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+aside-code("Example").
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doc = nlp(u'Give it back! He pleaded.')
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give_subtree = doc[0].subtree
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assert [t.text for t in give_subtree] == [u'Give', u'it', u'back', u'!']
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+table(["Name", "Type", "Description"])
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+row("foot")
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+cell yields
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+cell #[code Token]
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+cell A descendant token such that #[code self.is_ancestor(descendant)].
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+h(2, "is_sent_start") Token.is_sent_start
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+tag property
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+tag-new(2)
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p
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| A boolean value indicating whether the token starts a sentence.
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| #[code None] if unknown.
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+aside-code("Example").
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doc = nlp(u'Give it back! He pleaded.')
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assert doc[4].is_sent_start
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assert not doc[5].is_sent_start
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+table(["Name", "Type", "Description"])
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+row("foot")
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+cell returns
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+cell bool
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+cell Whether the token starts a sentence.
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+infobox("Changed in v2.0", "⚠️")
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| As of spaCy v2.0, the #[code Token.sent_start] property is deprecated and
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| has been replaced with #[code Token.is_sent_start], which returns a
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| boolean value instead of a misleading #[code 0] for #[code False] and
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| #[code 1] for #[code True]. It also now returns #[code None] if the
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| answer is unknown, and fixes a quirk in the old logic that would always
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| set the property to #[code 0] for the first word of the document.
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+code-wrapper
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+code-new assert doc[4].is_sent_start == True
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+code-old assert doc[4].sent_start == 1
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+h(2, "has_vector") Token.has_vector
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+tag property
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+tag-model("vectors")
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p
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| A boolean value indicating whether a word vector is associated with the
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| token.
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+aside-code("Example").
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doc = nlp(u'I like apples')
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apples = doc[2]
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assert apples.has_vector
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+table(["Name", "Type", "Description"])
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+row("foot")
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+cell returns
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+cell bool
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+cell Whether the token has a vector data attached.
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+h(2, "vector") Token.vector
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+tag property
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+tag-model("vectors")
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p A real-valued meaning representation.
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+aside-code("Example").
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doc = nlp(u'I like apples')
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apples = doc[2]
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assert apples.vector.dtype == 'float32'
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assert apples.vector.shape == (300,)
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+table(["Name", "Type", "Description"])
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+row("foot")
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+cell returns
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+cell #[code.u-break numpy.ndarray[ndim=1, dtype='float32']]
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+cell A 1D numpy array representing the token's semantics.
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+h(2, "vector_norm") Token.vector_norm
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+tag property
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+tag-model("vectors")
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p The L2 norm of the token's vector representation.
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+aside-code("Example").
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doc = nlp(u'I like apples and pasta')
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apples = doc[2]
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pasta = doc[4]
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apples.vector_norm # 6.89589786529541
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pasta.vector_norm # 7.759851932525635
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assert apples.vector_norm != pasta.vector_norm
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+table(["Name", "Type", "Description"])
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+row("foot")
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+cell returns
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+cell float
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+cell The L2 norm of the vector representation.
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+h(2, "attributes") Attributes
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+table(["Name", "Type", "Description"])
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+row
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+cell #[code doc]
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+cell #[code Doc]
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+cell The parent document.
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+row
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+cell #[code sent]
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+tag-new("2.0.12")
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+cell #[code Span]
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+cell The sentence span that this token is a part of.
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+row
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+cell #[code text]
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+cell unicode
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+cell Verbatim text content.
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+row
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+cell #[code text_with_ws]
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+cell unicode
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+cell Text content, with trailing space character if present.
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+row
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+cell #[code whitespace_]
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+cell unicode
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+cell Trailing space character if present.
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+row
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+cell #[code orth]
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+cell int
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+cell ID of the verbatim text content.
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+row
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+cell #[code orth_]
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+cell unicode
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+cell
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| Verbatim text content (identical to #[code Token.text]). Exists
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| mostly for consistency with the other attributes.
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+row
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+cell #[code vocab]
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+cell #[code Vocab]
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+cell The vocab object of the parent #[code Doc].
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+row
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+cell #[code doc]
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+cell #[code Doc]
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+cell The parent document.
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+row
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+cell #[code head]
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+cell #[code Token]
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+cell The syntactic parent, or "governor", of this token.
|
|
|
|
+row
|
|
+cell #[code left_edge]
|
|
+cell #[code Token]
|
|
+cell The leftmost token of this token's syntactic descendants.
|
|
|
|
+row
|
|
+cell #[code right_edge]
|
|
+cell #[code Token]
|
|
+cell The rightmost token of this token's syntactic descendants.
|
|
|
|
+row
|
|
+cell #[code i]
|
|
+cell int
|
|
+cell The index of the token within the parent document.
|
|
|
|
+row
|
|
+cell #[code ent_type]
|
|
+cell int
|
|
+cell Named entity type.
|
|
|
|
+row
|
|
+cell #[code ent_type_]
|
|
+cell unicode
|
|
+cell Named entity type.
|
|
|
|
+row
|
|
+cell #[code ent_iob]
|
|
+cell int
|
|
+cell
|
|
| IOB code of named entity tag. #[code "B"]
|
|
| means the token begins an entity, #[code "I"] means it is inside
|
|
| an entity, #[code "O"] means it is outside an entity, and
|
|
| #[code ""] means no entity tag is set.
|
|
|
|
+row
|
|
+cell #[code ent_iob_]
|
|
+cell unicode
|
|
+cell
|
|
| IOB code of named entity tag. #[code "B"]
|
|
| means the token begins an entity, #[code "I"] means it is inside
|
|
| an entity, #[code "O"] means it is outside an entity, and
|
|
| #[code ""] means no entity tag is set.
|
|
|
|
+row
|
|
+cell #[code ent_id]
|
|
+cell int
|
|
+cell
|
|
| ID of the entity the token is an instance of, if any. Currently
|
|
| not used, but potentially for coreference resolution.
|
|
|
|
+row
|
|
+cell #[code ent_id_]
|
|
+cell unicode
|
|
+cell
|
|
| ID of the entity the token is an instance of, if any. Currently
|
|
| not used, but potentially for coreference resolution.
|
|
|
|
+row
|
|
+cell #[code lemma]
|
|
+cell int
|
|
+cell
|
|
| Base form of the token, with no inflectional suffixes.
|
|
|
|
+row
|
|
+cell #[code lemma_]
|
|
+cell unicode
|
|
+cell Base form of the token, with no inflectional suffixes.
|
|
|
|
+row
|
|
+cell #[code norm]
|
|
+cell int
|
|
+cell
|
|
| The token's norm, i.e. a normalised form of the token text.
|
|
| Usually set in the language's
|
|
| #[+a("/usage/adding-languages#tokenizer-exceptions") tokenizer exceptions] or
|
|
| #[+a("/usage/adding-languages#norm-exceptions") norm exceptions].
|
|
|
|
+row
|
|
+cell #[code norm_]
|
|
+cell unicode
|
|
+cell
|
|
| The token's norm, i.e. a normalised form of the token text.
|
|
| Usually set in the language's
|
|
| #[+a("/usage/adding-languages#tokenizer-exceptions") tokenizer exceptions] or
|
|
| #[+a("/usage/adding-languages#norm-exceptions") norm exceptions].
|
|
|
|
+row
|
|
+cell #[code lower]
|
|
+cell int
|
|
+cell Lowercase form of the token.
|
|
|
|
+row
|
|
+cell #[code lower_]
|
|
+cell unicode
|
|
+cell
|
|
| Lowercase form of the token text. Equivalent to
|
|
| #[code Token.text.lower()].
|
|
|
|
+row
|
|
+cell #[code shape]
|
|
+cell int
|
|
+cell
|
|
| Transform of the tokens's string, to show orthographic features.
|
|
| For example, "Xxxx" or "dd".
|
|
|
|
+row
|
|
+cell #[code shape_]
|
|
+cell unicode
|
|
+cell
|
|
| Transform of the tokens's string, to show orthographic features.
|
|
| For example, "Xxxx" or "dd".
|
|
|
|
+row
|
|
+cell #[code prefix]
|
|
+cell int
|
|
+cell
|
|
| Hash value of a length-N substring from the start of the
|
|
| token. Defaults to #[code N=1].
|
|
|
|
+row
|
|
+cell #[code prefix_]
|
|
+cell unicode
|
|
+cell
|
|
| A length-N substring from the start of the token. Defaults to
|
|
| #[code N=1].
|
|
|
|
+row
|
|
+cell #[code suffix]
|
|
+cell int
|
|
+cell
|
|
| Hash value of a length-N substring from the end of the token.
|
|
| Defaults to #[code N=3].
|
|
|
|
+row
|
|
+cell #[code suffix_]
|
|
+cell unicode
|
|
+cell
|
|
| Length-N substring from the end of the token. Defaults to
|
|
| #[code N=3].
|
|
|
|
+row
|
|
+cell #[code is_alpha]
|
|
+cell bool
|
|
+cell
|
|
| Does the token consist of alphabetic characters? Equivalent to
|
|
| #[code token.text.isalpha()].
|
|
|
|
+row
|
|
+cell #[code is_ascii]
|
|
+cell bool
|
|
+cell
|
|
| Does the token consist of ASCII characters? Equivalent to
|
|
| #[code [any(ord(c) >= 128 for c in token.text)]].
|
|
|
|
+row
|
|
+cell #[code is_digit]
|
|
+cell bool
|
|
+cell
|
|
| Does the token consist of digits? Equivalent to
|
|
| #[code token.text.isdigit()].
|
|
|
|
+row
|
|
+cell #[code is_lower]
|
|
+cell bool
|
|
+cell
|
|
| Is the token in lowercase? Equivalent to
|
|
| #[code token.text.islower()].
|
|
|
|
+row
|
|
+cell #[code is_upper]
|
|
+cell bool
|
|
+cell
|
|
| Is the token in uppercase? Equivalent to
|
|
| #[code token.text.isupper()].
|
|
|
|
+row
|
|
+cell #[code is_title]
|
|
+cell bool
|
|
+cell
|
|
| Is the token in titlecase? Equivalent to
|
|
| #[code token.text.istitle()].
|
|
|
|
+row
|
|
+cell #[code is_punct]
|
|
+cell bool
|
|
+cell Is the token punctuation?
|
|
|
|
+row
|
|
+cell #[code is_left_punct]
|
|
+cell bool
|
|
+cell Is the token a left punctuation mark, e.g. #[code (]?
|
|
|
|
+row
|
|
+cell #[code is_right_punct]
|
|
+cell bool
|
|
+cell Is the token a right punctuation mark, e.g. #[code )]?
|
|
|
|
+row
|
|
+cell #[code is_space]
|
|
+cell bool
|
|
+cell
|
|
| Does the token consist of whitespace characters? Equivalent to
|
|
| #[code token.text.isspace()].
|
|
|
|
+row
|
|
+cell #[code is_bracket]
|
|
+cell bool
|
|
+cell Is the token a bracket?
|
|
|
|
+row
|
|
+cell #[code is_quote]
|
|
+cell bool
|
|
+cell Is the token a quotation mark?
|
|
|
|
+row
|
|
+cell #[code is_currency]
|
|
+tag-new("2.0.8")
|
|
+cell bool
|
|
+cell Is the token a currency symbol?
|
|
|
|
+row
|
|
+cell #[code like_url]
|
|
+cell bool
|
|
+cell Does the token resemble a URL?
|
|
|
|
+row
|
|
+cell #[code like_num]
|
|
+cell bool
|
|
+cell Does the token represent a number? e.g. "10.9", "10", "ten", etc.
|
|
|
|
+row
|
|
+cell #[code like_email]
|
|
+cell bool
|
|
+cell Does the token resemble an email address?
|
|
|
|
+row
|
|
+cell #[code is_oov]
|
|
+cell bool
|
|
+cell Is the token out-of-vocabulary?
|
|
|
|
+row
|
|
+cell #[code is_stop]
|
|
+cell bool
|
|
+cell Is the token part of a "stop list"?
|
|
|
|
+row
|
|
+cell #[code pos]
|
|
+cell int
|
|
+cell Coarse-grained part-of-speech.
|
|
|
|
+row
|
|
+cell #[code pos_]
|
|
+cell unicode
|
|
+cell Coarse-grained part-of-speech.
|
|
|
|
+row
|
|
+cell #[code tag]
|
|
+cell int
|
|
+cell Fine-grained part-of-speech.
|
|
|
|
+row
|
|
+cell #[code tag_]
|
|
+cell unicode
|
|
+cell Fine-grained part-of-speech.
|
|
|
|
+row
|
|
+cell #[code dep]
|
|
+cell int
|
|
+cell Syntactic dependency relation.
|
|
|
|
+row
|
|
+cell #[code dep_]
|
|
+cell unicode
|
|
+cell Syntactic dependency relation.
|
|
|
|
+row
|
|
+cell #[code lang]
|
|
+cell int
|
|
+cell Language of the parent document's vocabulary.
|
|
|
|
+row
|
|
+cell #[code lang_]
|
|
+cell unicode
|
|
+cell Language of the parent document's vocabulary.
|
|
|
|
+row
|
|
+cell #[code prob]
|
|
+cell float
|
|
+cell Smoothed log probability estimate of token's type.
|
|
|
|
+row
|
|
+cell #[code idx]
|
|
+cell int
|
|
+cell The character offset of the token within the parent document.
|
|
|
|
+row
|
|
+cell #[code sentiment]
|
|
+cell float
|
|
+cell
|
|
| A scalar value indicating the positivity or negativity of the
|
|
| token.
|
|
|
|
+row
|
|
+cell #[code lex_id]
|
|
+cell int
|
|
+cell Sequential ID of the token's lexical type.
|
|
|
|
+row
|
|
+cell #[code rank]
|
|
+cell int
|
|
+cell
|
|
| Sequential ID of the token's lexical type, used to index into
|
|
| tables, e.g. for word vectors.
|
|
|
|
+row
|
|
+cell #[code cluster]
|
|
+cell int
|
|
+cell Brown cluster ID.
|
|
|
|
+row
|
|
+cell #[code _]
|
|
+cell #[code Underscore]
|
|
+cell
|
|
| User space for adding custom
|
|
| #[+a("/usage/processing-pipelines#custom-components-attributes") attribute extensions].
|