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76 lines
2.5 KiB
Python
76 lines
2.5 KiB
Python
from .tokenizer_exceptions import TOKENIZER_EXCEPTIONS
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from .stop_words import STOP_WORDS
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from .lex_attrs import LEX_ATTRS
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from .syntax_iterators import SYNTAX_ITERATORS
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from .punctuation import TOKENIZER_INFIXES
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from ..tokenizer_exceptions import BASE_EXCEPTIONS
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from ...language import Language
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from ...attrs import LANG
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from ...util import update_exc
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def _return_en(_):
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return "en"
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class EnglishDefaults(Language.Defaults):
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lex_attr_getters = dict(Language.Defaults.lex_attr_getters)
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lex_attr_getters.update(LEX_ATTRS)
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lex_attr_getters[LANG] = _return_en
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tokenizer_exceptions = update_exc(BASE_EXCEPTIONS, TOKENIZER_EXCEPTIONS)
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stop_words = STOP_WORDS
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syntax_iterators = SYNTAX_ITERATORS
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infixes = TOKENIZER_INFIXES
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single_orth_variants = [
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{"tags": ["NFP"], "variants": ["…", "..."]},
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{"tags": [":"], "variants": ["-", "—", "–", "--", "---", "——"]},
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]
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paired_orth_variants = [
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{"tags": ["``", "''"], "variants": [("'", "'"), ("‘", "’")]},
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{"tags": ["``", "''"], "variants": [('"', '"'), ("“", "”")]},
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]
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@classmethod
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def is_base_form(cls, univ_pos, morphology=None):
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"""
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Check whether we're dealing with an uninflected paradigm, so we can
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avoid lemmatization entirely.
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univ_pos (unicode / int): The token's universal part-of-speech tag.
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morphology (dict): The token's morphological features following the
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Universal Dependencies scheme.
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"""
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if morphology is None:
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morphology = {}
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if univ_pos == "noun" and morphology.get("Number") == "sing":
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return True
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elif univ_pos == "verb" and morphology.get("VerbForm") == "inf":
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return True
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# This maps 'VBP' to base form -- probably just need 'IS_BASE'
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# morphology
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elif univ_pos == "verb" and (
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morphology.get("VerbForm") == "fin"
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and morphology.get("Tense") == "pres"
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and morphology.get("Number") is None
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):
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return True
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elif univ_pos == "adj" and morphology.get("Degree") == "pos":
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return True
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elif morphology.get("VerbForm") == "inf":
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return True
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elif morphology.get("VerbForm") == "none":
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return True
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elif morphology.get("Degree") == "pos":
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return True
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else:
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return False
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class English(Language):
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lang = "en"
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Defaults = EnglishDefaults
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__all__ = ["English"]
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