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💫 Adjust Table API and add docs (#4289)
* Adjust Table API and add docs * Add attributes and update description [ci skip] * Use strings.get_string_id instead of hash_string * Fix table method calls * Make orth arg in Lemmatizer.lookup optional Fall back to string, which is now handled by Table.__contains__ out-of-the-box * Fix method name * Auto-format
This commit is contained in:
Ines Montani
GitHub
parent
88a9d87f6f
commit
bab9976d9a
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@ -46,9 +46,10 @@ class GreekLemmatizer(object):
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)
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return lemmas
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def lookup(self, orth, string):
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if orth in self.lookup_table:
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return self.lookup_table[orth]
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def lookup(self, string, orth=None):
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key = orth if orth is not None else string
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if key in self.lookup_table:
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return self.lookup_table[key]
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return string
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@ -52,7 +52,7 @@ class FrenchLemmatizer(object):
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elif univ_pos in (SCONJ, "SCONJ", "sconj"):
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univ_pos = "sconj"
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else:
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return [self.lookup(None, string)]
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return [self.lookup(string)]
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# See Issue #435 for example of where this logic is requied.
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if self.is_base_form(univ_pos, morphology):
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return list(set([string.lower()]))
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@ -114,7 +114,7 @@ class FrenchLemmatizer(object):
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def punct(self, string, morphology=None):
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return self(string, "punct", morphology)
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def lookup(self, orth, string):
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def lookup(self, string, orth=None):
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if orth is not None and orth in self.lookup_table:
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return self.lookup_table[orth][0]
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return string
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@ -62,11 +62,11 @@ class DutchLemmatizer(object):
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# are not lemmatized. They are lowercased, however.
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return [string]
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# if string in self.lemma_index.get(univ_pos)
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lemma_index = self.index.get_string(univ_pos, {})
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lemma_index = self.index.get(univ_pos, {})
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# string is already lemma
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if string in lemma_index:
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return [string]
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exceptions = self.exc.get_string(univ_pos, {})
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exceptions = self.exc.get(univ_pos, {})
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# string is irregular token contained in exceptions index.
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try:
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lemma = exceptions[string]
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@ -75,12 +75,12 @@ class DutchLemmatizer(object):
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pass
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# string corresponds to key in lookup table
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lookup_table = self.lookup_table
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looked_up_lemma = lookup_table.get_string(string)
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looked_up_lemma = lookup_table.get(string)
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if looked_up_lemma and looked_up_lemma in lemma_index:
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return [looked_up_lemma]
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forms, is_known = lemmatize(
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string, lemma_index, exceptions, self.rules.get_string(univ_pos, [])
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string, lemma_index, exceptions, self.rules.get(univ_pos, [])
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)
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# Back-off through remaining return value candidates.
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@ -103,12 +103,12 @@ class DutchLemmatizer(object):
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# Overrides parent method so that a lowercased version of the string is
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# used to search the lookup table. This is necessary because our lookup
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# table consists entirely of lowercase keys.
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def lookup(self, orth, string):
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def lookup(self, string, orth=None):
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string = string.lower()
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if orth is not None:
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return self.lookup_table.get(orth, string)
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else:
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return self.lookup_table.get_string(string, string)
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return self.lookup_table.get(string, string)
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def noun(self, string, morphology=None):
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return self(string, "noun", morphology)
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@ -115,7 +115,7 @@ class RussianLemmatizer(Lemmatizer):
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def pron(self, string, morphology=None):
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return self(string, "pron", morphology)
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def lookup(self, orth, string):
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def lookup(self, string, orth=None):
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analyses = self._morph.parse(string)
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if len(analyses) == 1:
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return analyses[0].normal_form
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@ -112,7 +112,7 @@ class UkrainianLemmatizer(Lemmatizer):
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def pron(self, string, morphology=None):
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return self(string, "pron", morphology)
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def lookup(self, orth, string):
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def lookup(self, string, orth=None):
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analyses = self._morph.parse(string)
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if len(analyses) == 1:
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return analyses[0].normal_form
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@ -93,9 +93,19 @@ class Lemmatizer(object):
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def punct(self, string, morphology=None):
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return self(string, "punct", morphology)
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def lookup(self, orth, string):
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if orth in self.lookup_table:
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return self.lookup_table[orth]
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def lookup(self, string, orth=None):
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"""Look up a lemma in the table, if available. If no lemma is found,
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the original string is returned.
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string (unicode): The original string.
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orth (int): Optional hash of the string to look up. If not set, the
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string will be used and hashed.
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RETURNS (unicode): The lemma if the string was found, otherwise the
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original string.
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"""
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key = orth if orth is not None else string
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if key in self.lookup_table:
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return self.lookup_table[key]
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return string
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113
spacy/lookups.py
113
spacy/lookups.py
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@ -3,15 +3,19 @@ from __future__ import unicode_literals
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import srsly
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from collections import OrderedDict
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from preshed.bloom import BloomFilter
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from .errors import Errors
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from .util import SimpleFrozenDict, ensure_path
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from .strings import hash_string
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from .compat import basestring_
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from .strings import get_string_id
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from . import util
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import srsly
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from preshed.bloom import BloomFilter
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def ensure_hash(key):
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if isinstance(key, basestring_):
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return get_string_id(key)
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return key
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class Lookups(object):
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"""Container for large lookup tables and dictionaries, e.g. lemmatization
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@ -102,7 +106,7 @@ class Lookups(object):
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"""
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for key, value in srsly.msgpack_loads(bytes_data).items():
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self._tables[key] = Table(key)
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self._tables[key].update_raw(value)
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self._tables[key].update(value)
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return self
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def to_disk(self, path, **kwargs):
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@ -163,72 +167,85 @@ class Table(OrderedDict):
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"""
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OrderedDict.__init__(self)
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self.name = name
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# assume a default size of 1M items
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size = 1E6
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if data and len(data) > 0:
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size = len(data)
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# Assume a default size of 1M items
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self.default_size = 1e6
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size = len(data) if data and len(data) > 0 else self.default_size
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self.bloom = BloomFilter.from_error_rate(size)
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if data:
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self.update(data)
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def set(self, key, value):
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"""Set new key/value pair, where key is an integer. Same as
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table[key] = value.
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"""
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self[key] = value
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def __setitem__(self, key, value):
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"""Set new key/value pair. String keys will be hashed.
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key (unicode / int): The key to set.
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value: The value to set.
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"""
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key = ensure_hash(key)
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OrderedDict.__setitem__(self, key, value)
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self.bloom.add(key)
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def set_string(self, key, value):
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"""Set new key/value pair, where key is a string to be hashed.
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"""
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hkey = hash_string(key)
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self.set(hkey, value)
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def set(self, key, value):
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"""Set new key/value pair. String keys will be hashed.
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Same as table[key] = value.
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def update(self, data):
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"""Add entries in a dict-like to the table, where keys are strings to
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be hashed.
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key (unicode / int): The key to set.
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value: The value to set.
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"""
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for key, val in data.items():
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self.set_string(key, val)
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self[key] = value
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def update_raw(self, data):
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"""Add entries in a dict-like to the table, where keys are ints.
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def __getitem__(self, key):
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"""Get the value for a given key. String keys will be hashed.
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key (unicode / int): The key to get.
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RETURNS: The value.
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"""
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for key, val in data.items():
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self.set(key, val)
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key = ensure_hash(key)
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return OrderedDict.__getitem__(self, key)
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def get(self, key, default=None):
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"""Get the value for a given key. String keys will be hashed.
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key (unicode / int): The key to get.
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default: The default value to return.
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RETURNS: The value.
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"""
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key = ensure_hash(key)
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return OrderedDict.get(self, key, default)
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def get_string(self, key, default=None):
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hkey = hash_string(key)
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return OrderedDict.get(self, hkey, default)
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def __contains__(self, key):
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"""Check whether a key is in the table. String keys will be hashed.
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key (unicode / int): The key to check.
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RETURNS (bool): Whether the key is in the table.
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"""
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key = ensure_hash(key)
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# This can give a false positive, so we need to check it after
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if key not in self.bloom:
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return False
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return OrderedDict.__contains__(self, key)
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def contains_string(self, key):
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hkey = hash_string(key)
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return self.__contains__(hkey)
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def to_bytes(self):
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# TODO: serialize bloom too. For now just reconstruct it.
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return srsly.msgpack_dumps({'name': self.name, 'dict': dict(self.items())})
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"""Serialize table to a bytestring.
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def from_bytes(self, data):
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loaded = srsly.msgpack_loads(data)
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self.name = loaded['name']
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for key, val in loaded['dict'].items():
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self[key] = val
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self.bloom.add(key)
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RETURNS (bytes): The serialized table.
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"""
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data = [
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("name", self.name),
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("dict", dict(self.items())),
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("bloom", self.bloom.to_bytes()),
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]
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return srsly.msgpack_dumps(OrderedDict(data))
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def from_bytes(self, bytes_data):
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"""Load a table from a bytestring.
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bytes_data (bytes): The data to load.
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RETURNS (Table): The loaded table.
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"""
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loaded = srsly.msgpack_loads(bytes_data)
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data = loaded.get("dict", {})
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self.name = loaded["name"]
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self.bloom = BloomFilter().from_bytes(loaded["bloom"])
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self.clear()
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self.update(data)
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return self
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@ -273,7 +273,7 @@ cdef class Morphology:
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"""
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if token.lemma == 0:
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orth_str = self.strings[token.lex.orth]
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lemma = self.lemmatizer.lookup(token.lex.orth, orth_str)
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lemma = self.lemmatizer.lookup(orth_str, orth=token.lex.orth)
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token.lemma = self.strings.add(lemma)
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cdef int assign_tag(self, TokenC* token, tag_str) except -1:
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@ -17,6 +17,4 @@ TEST_CASES = [
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@pytest.mark.parametrize("tokens,lemmas", TEST_CASES)
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def test_lt_lemmatizer(lt_lemmatizer, tokens, lemmas):
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assert lemmas == [
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lt_lemmatizer.lookup_table.get_string(token, token) for token in tokens
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]
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assert lemmas == [lt_lemmatizer.lookup_table.get(token, token) for token in tokens]
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@ -133,11 +133,11 @@ def test_nl_lemmatizer_pronoun_lemmas(nl_lemmatizer, text, lemma):
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# Using the lemma lookup table only
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@pytest.mark.parametrize("text,lemma", noun_irreg_lemmatization_cases)
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def test_nl_lemmatizer_lookup_noun(nl_lemmatizer, text, lemma):
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lemma_pred = nl_lemmatizer.lookup(None, text)
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lemma_pred = nl_lemmatizer.lookup(text)
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assert lemma_pred in (lemma, text)
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@pytest.mark.parametrize("text,lemma", verb_irreg_lemmatization_cases)
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def test_nl_lemmatizer_lookup_verb(nl_lemmatizer, text, lemma):
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lemma_pred = nl_lemmatizer.lookup(None, text)
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lemma_pred = nl_lemmatizer.lookup(text)
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assert lemma_pred in (lemma, text)
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@ -2,7 +2,7 @@
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from __future__ import unicode_literals
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import pytest
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from spacy.lookups import Lookups
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from spacy.lookups import Lookups, Table, ensure_hash
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from spacy.vocab import Vocab
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from ..util import make_tempdir
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@ -19,9 +19,9 @@ def test_lookups_api():
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table = lookups.get_table(table_name)
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assert table.name == table_name
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assert len(table) == 2
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assert table.get_string("hello") == "world"
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table.set_string("a", "b")
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assert table.get_string("a") == "b"
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assert table["hello"] == "world"
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table["a"] = "b"
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assert table["a"] == "b"
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table = lookups.get_table(table_name)
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assert len(table) == 3
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with pytest.raises(KeyError):
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@ -36,6 +36,43 @@ def test_lookups_api():
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lookups.get_table(table_name)
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def test_table_api():
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table = Table(name="table")
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assert table.name == "table"
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assert len(table) == 0
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assert "abc" not in table
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data = {"foo": "bar", "hello": "world"}
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table = Table(name="table", data=data)
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assert len(table) == len(data)
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assert "foo" in table
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assert ensure_hash("foo") in table
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assert table["foo"] == "bar"
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assert table[ensure_hash("foo")] == "bar"
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assert table.get("foo") == "bar"
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assert table.get("abc") is None
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table["abc"] = 123
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assert table["abc"] == 123
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assert table[ensure_hash("abc")] == 123
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table.set("def", 456)
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assert table["def"] == 456
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assert table[ensure_hash("def")] == 456
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def test_table_api_to_from_bytes():
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data = {"foo": "bar", "hello": "world", "abc": 123}
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table = Table(name="table", data=data)
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table_bytes = table.to_bytes()
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new_table = Table().from_bytes(table_bytes)
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assert new_table.name == "table"
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assert len(new_table) == 3
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assert new_table["foo"] == "bar"
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assert new_table[ensure_hash("foo")] == "bar"
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new_table2 = Table(data={"def": 456})
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new_table2.from_bytes(table_bytes)
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assert len(new_table2) == 3
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assert "def" not in new_table2
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@pytest.mark.skip(reason="This fails on Python 3.5")
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def test_lookups_to_from_bytes():
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lookups = Lookups()
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@ -49,10 +86,10 @@ def test_lookups_to_from_bytes():
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assert "table2" in new_lookups
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table1 = new_lookups.get_table("table1")
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assert len(table1) == 2
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assert table1.get_string("foo") == "bar"
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assert table1["foo"] == "bar"
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table2 = new_lookups.get_table("table2")
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assert len(table2) == 3
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assert table2.get_string("b") == 2
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assert table2["b"] == 2
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assert new_lookups.to_bytes() == lookups_bytes
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@ -70,10 +107,10 @@ def test_lookups_to_from_disk():
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assert "table2" in new_lookups
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table1 = new_lookups.get_table("table1")
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assert len(table1) == 2
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assert table1.get_string("foo") == "bar"
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assert table1["foo"] == "bar"
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table2 = new_lookups.get_table("table2")
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assert len(table2) == 3
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assert table2.get_string("b") == 2
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assert table2["b"] == 2
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@pytest.mark.skip(reason="This fails on Python 3.5")
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@ -90,7 +127,7 @@ def test_lookups_to_from_bytes_via_vocab():
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assert table_name in new_vocab.lookups
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table = new_vocab.lookups.get_table(table_name)
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assert len(table) == 2
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assert table.get_string("hello") == "world"
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assert table["hello"] == "world"
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assert new_vocab.to_bytes() == vocab_bytes
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@ -109,4 +146,4 @@ def test_lookups_to_from_disk_via_vocab():
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assert table_name in new_vocab.lookups
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table = new_vocab.lookups.get_table(table_name)
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assert len(table) == 2
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assert table.get_string("hello") == "world"
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assert table["hello"] == "world"
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@ -335,7 +335,7 @@ cdef class Token:
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"""
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def __get__(self):
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if self.c.lemma == 0:
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lemma_ = self.vocab.morphology.lemmatizer.lookup(self.orth, self.orth_)
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lemma_ = self.vocab.morphology.lemmatizer.lookup(self.orth_, orth=self.orth)
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return self.vocab.strings[lemma_]
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||||
else:
|
||||
return self.c.lemma
|
||||
|
|
@ -862,7 +862,7 @@ cdef class Token:
|
|||
"""
|
||||
def __get__(self):
|
||||
if self.c.lemma == 0:
|
||||
return self.vocab.morphology.lemmatizer.lookup(self.orth, self.orth_)
|
||||
return self.vocab.morphology.lemmatizer.lookup(self.orth_, orth=self.orth)
|
||||
else:
|
||||
return self.vocab.strings[self.c.lemma]
|
||||
|
||||
|
|
|
|||
|
|
@ -52,8 +52,8 @@ Lemmatize a string.
|
|||
|
||||
Look up a lemma in the lookup table, if available. If no lemma is found, the
|
||||
original string is returned. Languages can provide a
|
||||
[lookup table](/usage/adding-languages#lemmatizer) via the `lemma_lookup`
|
||||
variable, set on the individual `Language` class.
|
||||
[lookup table](/usage/adding-languages#lemmatizer) via the `resources`, set on
|
||||
the individual `Language` class.
|
||||
|
||||
> #### Example
|
||||
>
|
||||
|
|
@ -63,10 +63,11 @@ variable, set on the individual `Language` class.
|
|||
> assert lemmatizer.lookup("going") == "go"
|
||||
> ```
|
||||
|
||||
| Name | Type | Description |
|
||||
| ----------- | ------- | ----------------------------------------------------------------- |
|
||||
| `string` | unicode | The string to look up. |
|
||||
| **RETURNS** | unicode | The lemma if the string was found, otherwise the original string. |
|
||||
| Name | Type | Description |
|
||||
| ----------- | ------- | ----------------------------------------------------------------------------------------------------------- |
|
||||
| `string` | unicode | The string to look up. |
|
||||
| `orth` | int | Optional hash of the string to look up. If not set, the string will be used and hashed. Defaults to `None`. |
|
||||
| **RETURNS** | unicode | The lemma if the string was found, otherwise the original string. |
|
||||
|
||||
## Lemmatizer.is_base_form {#is_base_form tag="method"}
|
||||
|
||||
|
|
|
|||
|
|
@ -7,10 +7,11 @@ new: 2.2
|
|||
---
|
||||
|
||||
This class allows convenient accesss to large lookup tables and dictionaries,
|
||||
e.g. lemmatization data or tokenizer exception lists. Lookups are available via
|
||||
the [`Vocab`](/api/vocab) as `vocab.lookups`, so they can be accessed before the
|
||||
pipeline components are applied (e.g. in the tokenizer and lemmatizer), as well
|
||||
as within the pipeline components via `doc.vocab.lookups`.
|
||||
e.g. lemmatization data or tokenizer exception lists using Bloom filters.
|
||||
Lookups are available via the [`Vocab`](/api/vocab) as `vocab.lookups`, so they
|
||||
can be accessed before the pipeline components are applied (e.g. in the
|
||||
tokenizer and lemmatizer), as well as within the pipeline components via
|
||||
`doc.vocab.lookups`.
|
||||
|
||||
## Lookups.\_\_init\_\_ {#init tag="method"}
|
||||
|
||||
|
|
@ -215,8 +216,11 @@ the file doesn't exist.
|
|||
## Table {#table tag="class, ordererddict"}
|
||||
|
||||
A table in the lookups. Subclass of `OrderedDict` that implements a slightly
|
||||
more consistent and unified API. Supports all other methods and attributes of
|
||||
`OrderedDict` / `dict`, and the customized methods listed here.
|
||||
more consistent and unified API and includes a Bloom filter to speed up missed
|
||||
lookups. Supports **all other methods and attributes** of `OrderedDict` /
|
||||
`dict`, and the customized methods listed here. Methods that get or set keys
|
||||
accept both integers and strings (which will be hashed before being added to the
|
||||
table).
|
||||
|
||||
### Table.\_\_init\_\_ {#table.init tag="method"}
|
||||
|
||||
|
|
@ -226,7 +230,10 @@ Initialize a new table.
|
|||
>
|
||||
> ```python
|
||||
> from spacy.lookups import Table
|
||||
> table = Table(name="some_table")
|
||||
> data = {"foo": "bar", "baz": 100}
|
||||
> table = Table(name="some_table", data=data)
|
||||
> assert "foo" in table
|
||||
> assert table["foo"] == "bar"
|
||||
> ```
|
||||
|
||||
| Name | Type | Description |
|
||||
|
|
@ -252,9 +259,10 @@ Initialize a new table from a dict.
|
|||
| `name` | unicode | Optional table name for reference. |
|
||||
| **RETURNS** | `Table` | The newly constructed object. |
|
||||
|
||||
### Table.set {#table.set tag="key"}
|
||||
### Table.set {#table.set tag="method"}
|
||||
|
||||
Set a new key / value pair. Same as `table[key] = value`.
|
||||
Set a new key / value pair. String keys will be hashed. Same as
|
||||
`table[key] = value`.
|
||||
|
||||
> #### Example
|
||||
>
|
||||
|
|
@ -265,7 +273,46 @@ Set a new key / value pair. Same as `table[key] = value`.
|
|||
> assert table["foo"] == "bar"
|
||||
> ```
|
||||
|
||||
| Name | Type | Description |
|
||||
| ------- | ------- | ----------- |
|
||||
| `key` | unicode | The key. |
|
||||
| `value` | - | The value. |
|
||||
| Name | Type | Description |
|
||||
| ------- | ------------- | ----------- |
|
||||
| `key` | unicode / int | The key. |
|
||||
| `value` | - | The value. |
|
||||
|
||||
### Table.to_bytes {#table.to_bytes tag="method"}
|
||||
|
||||
Serialize the table to a bytestring.
|
||||
|
||||
> #### Example
|
||||
>
|
||||
> ```python
|
||||
> table_bytes = table.to_bytes()
|
||||
> ```
|
||||
|
||||
| Name | Type | Description |
|
||||
| ----------- | ----- | --------------------- |
|
||||
| **RETURNS** | bytes | The serialized table. |
|
||||
|
||||
### Table.from_bytes {#table.from_bytes tag="method"}
|
||||
|
||||
Load a table from a bytestring.
|
||||
|
||||
> #### Example
|
||||
>
|
||||
> ```python
|
||||
> table_bytes = table.to_bytes()
|
||||
> table = Table()
|
||||
> table.from_bytes(table_bytes)
|
||||
> ```
|
||||
|
||||
| Name | Type | Description |
|
||||
| ------------ | ------- | ----------------- |
|
||||
| `bytes_data` | bytes | The data to load. |
|
||||
| **RETURNS** | `Table` | The loaded table. |
|
||||
|
||||
### Attributes {#table-attributes}
|
||||
|
||||
| Name | Type | Description |
|
||||
| -------------- | --------------------------- | ----------------------------------------------------- |
|
||||
| `name` | unicode | Table name. |
|
||||
| `default_size` | int | Default size of bloom filters if no data is provided. |
|
||||
| `bloom` | `preshed.bloom.BloomFilter` | The bloom filters. |
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user