mirror of
https://github.com/explosion/spaCy.git
synced 2025-11-04 09:57:26 +03:00
e2b70df012
* Use isort with Black profile * isort all the things * Fix import cycles as a result of import sorting * Add DOCBIN_ALL_ATTRS type definition * Add isort to requirements * Remove isort from build dependencies check * Typo
133 lines
4.5 KiB
Python
133 lines
4.5 KiB
Python
from typing import Dict, List, Tuple
|
|
|
|
from ...pipeline import Lemmatizer
|
|
from ...tokens import Token
|
|
|
|
|
|
class ItalianLemmatizer(Lemmatizer):
|
|
"""This lemmatizer was adapted from the Polish one (version of April 2021).
|
|
It implements lookup lemmatization based on the morphological lexicon
|
|
morph-it (Baroni and Zanchetta). The table lemma_lookup with non-POS-aware
|
|
entries is used as a backup for words that aren't handled by morph-it."""
|
|
|
|
@classmethod
|
|
def get_lookups_config(cls, mode: str) -> Tuple[List[str], List[str]]:
|
|
if mode == "pos_lookup":
|
|
required = [
|
|
"lemma_lookup_num",
|
|
"lemma_lookup_det",
|
|
"lemma_lookup_adp",
|
|
"lemma_lookup_adj",
|
|
"lemma_lookup_noun",
|
|
"lemma_lookup_pron",
|
|
"lemma_lookup_verb",
|
|
"lemma_lookup_aux",
|
|
"lemma_lookup_adv",
|
|
"lemma_lookup_other",
|
|
"lemma_lookup",
|
|
]
|
|
return (required, [])
|
|
else:
|
|
return super().get_lookups_config(mode)
|
|
|
|
def pos_lookup_lemmatize(self, token: Token) -> List[str]:
|
|
string = token.text
|
|
univ_pos = token.pos_
|
|
morphology = token.morph.to_dict()
|
|
lookup_pos = univ_pos.lower()
|
|
if univ_pos == "PROPN":
|
|
lookup_pos = "noun"
|
|
elif univ_pos == "PART":
|
|
lookup_pos = "pron"
|
|
lookup_table = self.lookups.get_table("lemma_lookup_" + lookup_pos, {})
|
|
if univ_pos == "NOUN":
|
|
return self.lemmatize_noun(string, morphology, lookup_table)
|
|
else:
|
|
if univ_pos != "PROPN":
|
|
string = string.lower()
|
|
if univ_pos == "DET":
|
|
return self.lemmatize_det(string, morphology, lookup_table)
|
|
elif univ_pos == "PRON":
|
|
return self.lemmatize_pron(string, morphology, lookup_table)
|
|
elif univ_pos == "ADP":
|
|
return self.lemmatize_adp(string, morphology, lookup_table)
|
|
elif univ_pos == "ADJ":
|
|
return self.lemmatize_adj(string, morphology, lookup_table)
|
|
else:
|
|
lemma = lookup_table.get(string, "")
|
|
if not lemma:
|
|
lookup_table = self.lookups.get_table("lemma_lookup_other")
|
|
lemma = lookup_table.get(string, "")
|
|
if not lemma:
|
|
lookup_table = self.lookups.get_table(
|
|
"lemma_lookup"
|
|
) # "legacy" lookup table
|
|
lemma = lookup_table.get(string, string.lower())
|
|
return [lemma]
|
|
|
|
def lemmatize_det(
|
|
self, string: str, morphology: dict, lookup_table: Dict[str, str]
|
|
) -> List[str]:
|
|
if string in [
|
|
"l'",
|
|
"lo",
|
|
"la",
|
|
"i",
|
|
"gli",
|
|
"le",
|
|
]:
|
|
return ["il"]
|
|
if string in ["un'", "un", "una"]:
|
|
return ["uno"]
|
|
return [lookup_table.get(string, string)]
|
|
|
|
def lemmatize_pron(
|
|
self, string: str, morphology: dict, lookup_table: Dict[str, str]
|
|
) -> List[str]:
|
|
if string in [
|
|
"l'",
|
|
"li",
|
|
"la",
|
|
"gli",
|
|
"le",
|
|
]:
|
|
return ["lo"]
|
|
if string in ["un'", "un", "una"]:
|
|
return ["uno"]
|
|
lemma = lookup_table.get(string, string)
|
|
if lemma == "alcun":
|
|
lemma = "alcuno"
|
|
elif lemma == "qualcun":
|
|
lemma = "qualcuno"
|
|
return [lemma]
|
|
|
|
def lemmatize_adp(
|
|
self, string: str, morphology: dict, lookup_table: Dict[str, str]
|
|
) -> List[str]:
|
|
if string == "d'":
|
|
return ["di"]
|
|
return [lookup_table.get(string, string)]
|
|
|
|
def lemmatize_adj(
|
|
self, string: str, morphology: dict, lookup_table: Dict[str, str]
|
|
) -> List[str]:
|
|
lemma = lookup_table.get(string, string)
|
|
if lemma == "alcun":
|
|
lemma = "alcuno"
|
|
elif lemma == "qualcun":
|
|
lemma = "qualcuno"
|
|
return [lemma]
|
|
|
|
def lemmatize_noun(
|
|
self, string: str, morphology: dict, lookup_table: Dict[str, str]
|
|
) -> List[str]:
|
|
# this method is case-sensitive, in order to work
|
|
# for incorrectly tagged proper names
|
|
if string != string.lower():
|
|
if string.lower() in lookup_table:
|
|
return [lookup_table[string.lower()]]
|
|
elif string in lookup_table:
|
|
return [lookup_table[string]]
|
|
return [string.lower()]
|
|
return [lookup_table.get(string, string)]
|