mirror of
https://github.com/explosion/spaCy.git
synced 2024-12-25 01:16:28 +03:00
161 lines
4.2 KiB
Plaintext
161 lines
4.2 KiB
Plaintext
//- 💫 DOCS > API > LEMMATIZER
|
|
|
|
include ../_includes/_mixins
|
|
|
|
p
|
|
| The #[code Lemmatizer] supports simple part-of-speech-sensitive suffix
|
|
| rules and lookup tables.
|
|
|
|
+h(2, "init") Lemmatizer.__init__
|
|
+tag method
|
|
|
|
p Create a #[code Lemmatizer].
|
|
|
|
+aside-code("Example").
|
|
from spacy.lemmatizer import Lemmatizer
|
|
lemmatizer = Lemmatizer()
|
|
|
|
+table(["Name", "Type", "Description"])
|
|
+row
|
|
+cell #[code index]
|
|
+cell dict / #[code None]
|
|
+cell Inventory of lemmas in the language.
|
|
|
|
+row
|
|
+cell #[code exceptions]
|
|
+cell dict / #[code None]
|
|
+cell Mapping of string forms to lemmas that bypass the #[code rules].
|
|
|
|
+row
|
|
+cell #[code rules]
|
|
+cell dict / #[code None]
|
|
+cell List of suffix rewrite rules.
|
|
|
|
+row
|
|
+cell #[code lookup]
|
|
+cell dict / #[code None]
|
|
+cell Lookup table mapping string to their lemmas.
|
|
|
|
+row("foot")
|
|
+cell returns
|
|
+cell #[code Lemmatizer]
|
|
+cell The newly created object.
|
|
|
|
+h(2, "call") Lemmatizer.__call__
|
|
+tag method
|
|
|
|
p Lemmatize a string.
|
|
|
|
+aside-code("Example").
|
|
from spacy.lemmatizer import Lemmatizer
|
|
from spacy.lang.en import LEMMA_INDEX, LEMMA_EXC, LEMMA_RULES
|
|
lemmatizer = Lemmatizer(LEMMA_INDEX, LEMMA_EXC, LEMMA_RULES)
|
|
lemmas = lemmatizer(u'ducks', u'NOUN')
|
|
assert lemmas == [u'duck']
|
|
|
|
+table(["Name", "Type", "Description"])
|
|
+row
|
|
+cell #[code string]
|
|
+cell unicode
|
|
+cell The string to lemmatize, e.g. the token text.
|
|
|
|
+row
|
|
+cell #[code univ_pos]
|
|
+cell unicode / int
|
|
+cell The token's universal part-of-speech tag.
|
|
|
|
+row
|
|
+cell #[code morphology]
|
|
+cell dict / #[code None]
|
|
+cell
|
|
| Morphological features following the
|
|
| #[+a("http://universaldependencies.org/") Universal Dependencies]
|
|
| scheme.
|
|
|
|
+row("foot")
|
|
+cell returns
|
|
+cell list
|
|
+cell The available lemmas for the string.
|
|
|
|
+h(2, "lookup") Lemmatizer.lookup
|
|
+tag method
|
|
+tag-new(2)
|
|
|
|
p
|
|
| Look up a lemma in the lookup table, if available. If no lemma is found,
|
|
| the original string is returned. Languages can provide a
|
|
| #[+a("/usage/adding-languages#lemmatizer") lookup table] via the
|
|
| #[code lemma_lookup] variable, set on the individual #[code Language]
|
|
| class.
|
|
|
|
+aside-code("Example").
|
|
lookup = {u'going': u'go'}
|
|
lemmatizer = Lemmatizer(lookup=lookup)
|
|
assert lemmatizer.lookup(u'going') == u'go'
|
|
|
|
+table(["Name", "Type", "Description"])
|
|
+row
|
|
+cell #[code string]
|
|
+cell unicode
|
|
+cell The string to look up.
|
|
|
|
+row("foot")
|
|
+cell returns
|
|
+cell unicode
|
|
+cell The lemma if the string was found, otherwise the original string.
|
|
|
|
+h(2, "is_base_form") Lemmatizer.is_base_form
|
|
+tag method
|
|
|
|
p
|
|
| Check whether we're dealing with an uninflected paradigm, so we can
|
|
| avoid lemmatization entirely.
|
|
|
|
+aside-code("Example").
|
|
pos = 'verb'
|
|
morph = {'VerbForm': 'inf'}
|
|
is_base_form = lemmatizer.is_base_form(pos, morph)
|
|
assert is_base_form == True
|
|
|
|
+table(["Name", "Type", "Description"])
|
|
+row
|
|
+cell #[code univ_pos]
|
|
+cell unicode / int
|
|
+cell The token's universal part-of-speech tag.
|
|
|
|
+row
|
|
+cell #[code morphology]
|
|
+cell dict
|
|
+cell The token's morphological features.
|
|
|
|
+row("foot")
|
|
+cell returns
|
|
+cell bool
|
|
+cell
|
|
| Whether the token's part-of-speech tag and morphological features
|
|
| describe a base form.
|
|
|
|
+h(2, "attributes") Attributes
|
|
|
|
+table(["Name", "Type", "Description"])
|
|
+row
|
|
+cell #[code index]
|
|
+cell dict / #[code None]
|
|
+cell Inventory of lemmas in the language.
|
|
|
|
+row
|
|
+cell #[code exc]
|
|
+cell dict / #[code None]
|
|
+cell Mapping of string forms to lemmas that bypass the #[code rules].
|
|
|
|
+row
|
|
+cell #[code rules]
|
|
+cell dict / #[code None]
|
|
+cell List of suffix rewrite rules.
|
|
|
|
+row
|
|
+cell #[code lookup_table]
|
|
+tag-new(2)
|
|
+cell dict / #[code None]
|
|
+cell The lemma lookup table, if available.
|