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c053f158c5
* Add support for fasttext-bloom hash-only vectors
Overview:
* Extend `Vectors` to have two modes: `default` and `ngram`
* `default` is the default mode and equivalent to the current
`Vectors`
* `ngram` supports the hash-only ngram tables from `fasttext-bloom`
* Extend `spacy.StaticVectors.v2` to handle both modes with no changes
for `default` vectors
* Extend `spacy init vectors` to support ngram tables
The `ngram` mode **only** supports vector tables produced by this
fork of fastText, which adds an option to represent all vectors using
only the ngram buckets table and which uses the exact same ngram
generation algorithm and hash function (`MurmurHash3_x64_128`).
`fasttext-bloom` produces an additional `.hashvec` table, which can be
loaded by `spacy init vectors --fasttext-bloom-vectors`.
https://github.com/adrianeboyd/fastText/tree/feature/bloom
Implementation details:
* `Vectors` now includes the `StringStore` as `Vectors.strings` so that
the API can stay consistent for both `default` (which can look up from
`str` or `int`) and `ngram` (which requires `str` to calculate the
ngrams).
* In ngram mode `Vectors` uses a default `Vectors` object as a cache
since the ngram vectors lookups are relatively expensive.
* The default cache size is the same size as the provided ngram vector
table.
* Once the cache is full, no more entries are added. The user is
responsible for managing the cache in cases where the initial
documents are not representative of the texts.
* The cache can be resized by setting `Vectors.ngram_cache_size` or
cleared with `vectors._ngram_cache.clear()`.
* The API ends up a bit split between methods for `default` and for
`ngram`, so functions that only make sense for `default` or `ngram`
include warnings with custom messages suggesting alternatives where
possible.
* `Vocab.vectors` becomes a property so that the string stores can be
synced when assigning vectors to a vocab.
* `Vectors` serializes its own config settings as `vectors.cfg`.
* The `Vectors` serialization methods have added support for `exclude`
so that the `Vocab` can exclude the `Vectors` strings while serializing.
Removed:
* The `minn` and `maxn` options and related code from
`Vocab.get_vector`, which does not work in a meaningful way for default
vector tables.
* The unused `GlobalRegistry` in `Vectors`.
* Refactor to use reduce_mean
Refactor to use reduce_mean and remove the ngram vectors cache.
* Rename to floret
* Rename to floret in error messages
* Use --vectors-mode in CLI, vector init
* Fix vectors mode in init
* Remove unused var
* Minor API and docstrings adjustments
* Rename `--vectors-mode` to `--mode` in `init vectors` CLI
* Rename `Vectors.get_floret_vectors` to `Vectors.get_batch` and support
both modes.
* Minor updates to Vectors docstrings.
* Update API docs for Vectors and init vectors CLI
* Update types for StaticVectors
48 lines
1.3 KiB
Cython
48 lines
1.3 KiB
Cython
from libcpp.vector cimport vector
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from preshed.maps cimport PreshMap
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from cymem.cymem cimport Pool
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from murmurhash.mrmr cimport hash64
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from .structs cimport LexemeC, TokenC
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from .typedefs cimport attr_t, hash_t
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from .strings cimport StringStore
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from .morphology cimport Morphology
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cdef LexemeC EMPTY_LEXEME
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cdef union LexemesOrTokens:
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const LexemeC* const* lexemes
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const TokenC* tokens
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cdef struct _Cached:
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LexemesOrTokens data
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bint is_lex
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int length
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cdef class Vocab:
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cdef Pool mem
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cdef readonly StringStore strings
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cdef public Morphology morphology
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cdef public object _vectors
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cdef public object _lookups
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cdef public object writing_system
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cdef public object get_noun_chunks
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cdef readonly int length
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cdef public object _unused_object # TODO remove in v4, see #9150
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cdef public object lex_attr_getters
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cdef public object cfg
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cdef const LexemeC* get(self, Pool mem, str string) except NULL
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cdef const LexemeC* get_by_orth(self, Pool mem, attr_t orth) except NULL
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cdef const TokenC* make_fused_token(self, substrings) except NULL
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cdef const LexemeC* _new_lexeme(self, Pool mem, str string) except NULL
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cdef int _add_lex_to_vocab(self, hash_t key, const LexemeC* lex) except -1
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cdef const LexemeC* _new_lexeme(self, Pool mem, str string) except NULL
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cdef PreshMap _by_orth
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