diff --git a/spacy/en.pxd b/spacy/en.pxd index 8f514ec9d..caf17227a 100644 --- a/spacy/en.pxd +++ b/spacy/en.pxd @@ -1,6 +1,37 @@ from spacy.lang cimport Language from spacy.word cimport Lexeme -cimport cython +from spacy.tokens cimport Tokens + + +cdef class EnglishTokens(Tokens): + cpdef unicode canon_string(self, size_t i) + cpdef unicode shape_string(self, size_t i) + cpdef unicode non_sparse_string(self, size_t i) + cpdef unicode asciied(self, size_t i) + cpdef bint is_alpha(self, size_t i) + cpdef bint is_ascii(self, size_t i) + cpdef bint is_digit(self, size_t i) + cpdef bint is_lower(self, size_t i) + cpdef bint is_punct(self, size_t i) + cpdef bint is_space(self, size_t i) + cpdef bint is_title(self, size_t i) + cpdef bint is_upper(self, size_t i) + cpdef bint can_adj(self, size_t i) + cpdef bint can_adp(self, size_t i) + cpdef bint can_adv(self, size_t i) + cpdef bint can_conj(self, size_t i) + cpdef bint can_det(self, size_t i) + cpdef bint can_noun(self, size_t i) + cpdef bint can_num(self, size_t i) + cpdef bint can_pdt(self, size_t i) + cpdef bint can_pos(self, size_t i) + cpdef bint can_pron(self, size_t i) + cpdef bint can_prt(self, size_t i) + cpdef bint can_punct(self, size_t i) + cpdef bint can_verb(self, size_t i) + cpdef bint oft_lower(self, size_t i) + cpdef bint oft_title(self, size_t i) + cpdef bint oft_upper(self, size_t i) cdef class English(Language): diff --git a/spacy/en.pyx b/spacy/en.pyx index 5355c2b8b..497c9e350 100644 --- a/spacy/en.pyx +++ b/spacy/en.pyx @@ -46,44 +46,169 @@ from spacy import util from spacy import orth -TAG_THRESH = 0.5 -UPPER_THRESH = 0.2 -LOWER_THRESH = 0.5 -TITLE_THRESH = 0.7 -NR_FLAGS = 0 +cdef enum Flags: + Flag_IsAlpha + Flag_IsAscii + Flag_IsDigit + Flag_IsLower + Flag_IsPunct + Flag_IsSpace + Flag_IsTitle + Flag_IsUpper -OFT_UPPER = NR_FLAGS; NR_FLAGS += 1 -OFT_LOWER = NR_FLAGS; NR_FLAGS += 1 -OFT_TITLE = NR_FLAGS; NR_FLAGS += 1 + Flag_CanAdj + Flag_CanAdp + Flag_CanAdv + Flag_CanConj + Flag_CanDet + Flag_CanNoun + Flag_CanNum + Flag_CanPdt + Flag_CanPos + Flag_CanPron + Flag_CanPrt + Flag_CanPunct + Flag_CanVerb -IS_ALPHA = NR_FLAGS; NR_FLAGS += 1 -IS_DIGIT = NR_FLAGS; NR_FLAGS += 1 -IS_PUNCT = NR_FLAGS; NR_FLAGS += 1 -IS_SPACE = NR_FLAGS; NR_FLAGS += 1 -IS_ASCII = NR_FLAGS; NR_FLAGS += 1 -IS_TITLE = NR_FLAGS; NR_FLAGS += 1 -IS_LOWER = NR_FLAGS; NR_FLAGS += 1 -IS_UPPER = NR_FLAGS; NR_FLAGS += 1 + Flag_OftLower + Flag_OftTitle + Flag_OftUpper + Flag_N -CAN_PUNCT = NR_FLAGS; NR_FLAGS += 1 -CAN_CONJ = NR_FLAGS; NR_FLAGS += 1 -CAN_NUM = NR_FLAGS; NR_FLAGS += 1 -CAN_DET = NR_FLAGS; NR_FLAGS += 1 -CAN_ADP = NR_FLAGS; NR_FLAGS += 1 -CAN_ADJ = NR_FLAGS; NR_FLAGS += 1 -CAN_ADV = NR_FLAGS; NR_FLAGS += 1 -CAN_VERB = NR_FLAGS; NR_FLAGS += 1 -CAN_NOUN = NR_FLAGS; NR_FLAGS += 1 -CAN_PDT = NR_FLAGS; NR_FLAGS += 1 -CAN_POS = NR_FLAGS; NR_FLAGS += 1 -CAN_PRON = NR_FLAGS; NR_FLAGS += 1 -CAN_PRT = NR_FLAGS; NR_FLAGS += 1 -NR_VIEWS = 0 -CANON_CASED = NR_VIEWS; NR_VIEWS += 1 -SHAPE = NR_VIEWS; NR_VIEWS += 1 -NON_SPARSE = NR_VIEWS; NR_VIEWS += 1 +cdef enum Views: + View_CanonForm + View_WordShape + View_NonSparse + View_Asciied + View_N + + +# Assign the flag and view functions by enum value. +# This is verbose, but it ensures we don't get nasty order sensitivities. +STRING_VIEW_FUNCS = [None] * View_N +STRING_VIEW_FUNCS[View_CanonForm] = orth.canon_case +STRING_VIEW_FUNCS[View_WordShape] = orth.word_shape +STRING_VIEW_FUNCS[View_NonSparse] = orth.non_sparse +STRING_VIEW_FUNCS[View_Asciied] = orth.asciied + +FLAG_FUNCS = [None] * Flag_N +FLAG_FUNCS[Flag_IsAlpha] = orth.is_alpha +FLAG_FUNCS[Flag_IsAscii] = orth.is_ascii +FLAG_FUNCS[Flag_IsDigit] = orth.is_digit +FLAG_FUNCS[Flag_IsLower] = orth.is_lower +FLAG_FUNCS[Flag_IsPunct] = orth.is_punct +FLAG_FUNCS[Flag_IsSpace] = orth.is_space +FLAG_FUNCS[Flag_IsTitle] = orth.is_title +FLAG_FUNCS[Flag_IsUpper] = orth.is_upper + +FLAG_FUNCS[Flag_CanAdj] = orth.can_tag('ADJ') +FLAG_FUNCS[Flag_CanAdp] = orth.can_tag('ADP') +FLAG_FUNCS[Flag_CanAdv] = orth.can_tag('ADV') +FLAG_FUNCS[Flag_CanConj] = orth.can_tag('CONJ') +FLAG_FUNCS[Flag_CanDet] = orth.can_tag('DET') +FLAG_FUNCS[Flag_CanNoun] = orth.can_tag('NOUN') +FLAG_FUNCS[Flag_CanNum] = orth.can_tag('NUM') +FLAG_FUNCS[Flag_CanPdt] = orth.can_tag('PDT') +FLAG_FUNCS[Flag_CanPos] = orth.can_tag('POS') +FLAG_FUNCS[Flag_CanPron] = orth.can_tag('PRON') +FLAG_FUNCS[Flag_CanPrt] = orth.can_tag('PRT') +FLAG_FUNCS[Flag_CanPunct] = orth.can_tag('PUNCT') +FLAG_FUNCS[Flag_CanVerb] = orth.can_tag('VERB') + +FLAG_FUNCS[Flag_OftLower] = orth.oft_case('lower', 0.7) +FLAG_FUNCS[Flag_OftTitle] = orth.oft_case('title', 0.7) +FLAG_FUNCS[Flag_OftUpper] = orth.oft_case('upper', 0.7) + + +cdef class EnglishTokens(Tokens): + # Provide accessor methods for the features supported by the language. + # Without these, clients have to use the underlying string_view and check_flag + # methods, which requires them to know the IDs. + cpdef unicode canon_string(self, size_t i): + return self.lexemes[i].string_view(View_CanonForm) + + cpdef unicode shape_string(self, size_t i): + return self.lexemes[i].string_view(View_WordShape) + + cpdef unicode non_sparse_string(self, size_t i): + return self.lexemes[i].string_view(View_NonSparse) + + cpdef unicode asciied(self, size_t i): + return self.lexemes[i].string_views(View_Asciied) + + cpdef bint is_alpha(self, size_t i): + return self.lexemes[i].check_flag(i, Flag_IsAlpha) + + cpdef bint is_ascii(self, size_t i): + return self.lexemes[i].check_flag(i, Flag_IsAscii) + + cpdef bint is_digit(self, size_t i): + return self.lexemes[i].check_flag(i, Flag_IsDigit) + + cpdef bint is_lower(self, size_t i): + return self.lexemes[i].check_flag(i, Flag_IsLower) + + cpdef bint is_punct(self, size_t i): + return self.lexemes[i].check_flag(i, Flag_IsPunct) + + cpdef bint is_space(self, size_t i): + return self.lexemes[i].check_flag(i, Flag_IsSpace) + + cpdef bint is_title(self, size_t i): + return self.lexemes[i].check_flag(i, Flag_IsTitle) + + cpdef bint is_upper(self, size_t i): + return self.lexemes[i].check_flag(i, Flag_IsUpper) + + cpdef bint can_adj(self, size_t i): + return self.lexemes[i].check_flag(i, Flag_CanAdj) + + cpdef bint can_adp(self, size_t i): + return self.lexemes[i].check_flag(i, Flag_CanAdp) + + cpdef bint can_adv(self, size_t i): + return self.lexemes[i].check_flag(i, Flag_CanAdv) + + cpdef bint can_conj(self, size_t i): + return self.lexemes[i].check_flag(i, Flag_CanConj) + + cpdef bint can_det(self, size_t i): + return self.lexemes[i].check_flag(i, Flag_CanDet) + + cpdef bint can_noun(self, size_t i): + return self.lexemes[i].check_flag(i, Flag_CanNoun) + + cpdef bint can_num(self, size_t i): + return self.lexemes[i].check_flag(i, Flag_CanNum) + + cpdef bint can_pdt(self, size_t i): + return self.lexemes[i].check_flag(i, Flag_CanPdt) + + cpdef bint can_pos(self, size_t i): + return self.lexemes[i].check_flag(i, Flag_CanPos) + + cpdef bint can_pron(self, size_t i): + return self.lexemes[i].check_flag(i, Flag_CanPron) + + cpdef bint can_prt(self, size_t i): + return self.lexemes[i].check_flag(i, Flag_CanPrt) + + cpdef bint can_punct(self, size_t i): + return self.lexemes[i].check_flag(i, Flag_CanPunct) + + cpdef bint can_verb(self, size_t i): + return self.lexemes[i].check_flag(i, Flag_CanVerb) + + cpdef bint oft_lower(self, size_t i): + return self.lexemes[i].check_flag(i, Flag_OftLower) + + cpdef bint oft_title(self, size_t i): + return self.lexemes[i].check_flag(i, Flag_OftTitle) + + cpdef bint oft_upper(self, size_t i): + return self.lexemes[i].check_flag(i, Flag_OftUpper) cdef class English(Language): @@ -93,48 +218,15 @@ cdef class English(Language): name (unicode): The two letter code used by Wikipedia for the language. lexicon (Lexicon): The lexicon. Exposes the lookup method. """ - - def __cinit__(self, name, string_features, flag_features): - flag_funcs = [None for _ in range(NR_FLAGS)] - - flag_funcs[OFT_UPPER] = orth.oft_case('upper', UPPER_THRESH) - flag_funcs[OFT_LOWER] = orth.oft_case('lower', LOWER_THRESH) - flag_funcs[OFT_TITLE] = orth.oft_case('title', TITLE_THRESH) - - flag_funcs[IS_ALPHA] = orth.is_alpha - flag_funcs[IS_DIGIT] = orth.is_digit - flag_funcs[IS_PUNCT] = orth.is_punct - flag_funcs[IS_SPACE] = orth.is_space - flag_funcs[IS_ASCII] = orth.is_ascii - flag_funcs[IS_TITLE] = orth.is_title - flag_funcs[IS_LOWER] = orth.is_lower - flag_funcs[IS_UPPER] = orth.is_upper - - flag_funcs[CAN_PUNCT] = orth.can_tag('PUNCT', TAG_THRESH) - flag_funcs[CAN_CONJ] = orth.can_tag('CONJ', TAG_THRESH) - flag_funcs[CAN_NUM] = orth.can_tag('NUM', TAG_THRESH) - flag_funcs[CAN_DET] = orth.can_tag('DET', TAG_THRESH) - flag_funcs[CAN_ADP] = orth.can_tag('ADP', TAG_THRESH) - flag_funcs[CAN_ADJ] = orth.can_tag('ADJ', TAG_THRESH) - flag_funcs[CAN_ADV] = orth.can_tag('ADV', TAG_THRESH) - flag_funcs[CAN_VERB] = orth.can_tag('VERB', TAG_THRESH) - flag_funcs[CAN_NOUN] = orth.can_tag('NOUN', TAG_THRESH) - flag_funcs[CAN_PDT] = orth.can_tag('PDT', TAG_THRESH) - flag_funcs[CAN_POS] = orth.can_tag('POS', TAG_THRESH) - flag_funcs[CAN_PRON] = orth.can_tag('PRON', TAG_THRESH) - flag_funcs[CAN_PRT] = orth.can_tag('PRT', TAG_THRESH) - - string_funcs = [None for _ in range(NR_VIEWS)] - string_funcs[CANON_CASED] = orth.canon_case - string_funcs[SHAPE] = orth.word_shape - string_funcs[NON_SPARSE] = orth.non_sparse - self.name = name + def __cinit__(self, name, user_string_features, user_flag_features): self.cache = {} lang_data = util.read_lang_data(name) rules, words, probs, clusters, case_stats, tag_stats = lang_data self.lexicon = lang.Lexicon(words, probs, clusters, case_stats, tag_stats, - string_funcs, flag_funcs) + STRING_VIEW_FUNCS + user_string_features, + FLAG_FUNCS + user_flag_features) self._load_special_tokenization(rules) + self.token_class = EnglishTokens cdef int _split_one(self, unicode word): cdef size_t length = len(word) @@ -154,6 +246,7 @@ cdef class English(Language): i += 1 return i + cdef bint _check_punct(unicode word, size_t i, size_t length): # Don't count appostrophes as punct if the next char is a letter if word[i] == "'" and i < (length - 1) and word[i+1].isalpha(): diff --git a/spacy/lang.pxd b/spacy/lang.pxd index 6224f9fb5..d948dd5bb 100644 --- a/spacy/lang.pxd +++ b/spacy/lang.pxd @@ -1,9 +1,21 @@ from libc.stdint cimport uint32_t from libc.stdint cimport uint64_t from spacy.word cimport Lexeme +from spacy.tokens cimport Tokens + + +cdef struct Flags: + size_t is_alpha + size_t can_noun + + +cdef struct ViewIDs: + size_t canon_form cdef class Lexicon: + cpdef readonly size_t size + cpdef Lexeme lookup(self, unicode string) cdef dict _dict @@ -16,10 +28,11 @@ cdef class Language: cdef unicode name cdef dict cache cpdef readonly Lexicon lexicon + cpdef readonly object tokens_class cpdef list tokenize(self, unicode text) cpdef Lexeme lookup(self, unicode text) - cdef list _tokenize(self, unicode string) + cdef _tokenize(self, Tokens tokens, unicode string) cdef list _split(self, unicode string) cdef int _split_one(self, unicode word) diff --git a/spacy/lang.pyx b/spacy/lang.pyx index ecf3acd7a..3d02b7677 100644 --- a/spacy/lang.pyx +++ b/spacy/lang.pyx @@ -14,6 +14,7 @@ import json from os import path from .util import read_lang_data +from spacy.tokens import Tokens cdef class Language: @@ -42,6 +43,23 @@ cdef class Language: self.lexicon = Lexicon(words, probs, clusters, case_stats, tag_stats, string_features, flag_features) self._load_special_tokenization(rules) + self.token_class = Tokens + + property nr_types: + def __get__(self): + """Return the number of lexical types in the vocabulary""" + return self.lexicon.size + + cpdef Lexeme lookup(self, unicode string): + """Retrieve (or create, if not found) a Lexeme for a string, and return it. + + Args: + string (unicode): The string to be looked up. Must be unicode, not bytes. + + Returns: + lexeme (Lexeme): A reference to a lexical type. + """ + return self.lexicon.lookup(string) cpdef list tokenize(self, unicode string): """Tokenize a string. @@ -58,43 +76,39 @@ cdef class Language: Returns: tokens (Tokens): A Tokens object, giving access to a sequence of LexIDs. """ - if not string: - return [] - cdef list tokens = [] + assert string + cdef size_t length = len(string) cdef size_t start = 0 cdef size_t i = 0 + cdef Tokens tokens = self.token_class() for c in string: if c == ' ': if start < i: - tokens.extend(self._tokenize(string[start:i])) + self._tokenize(tokens, string[start:i]) start = i + 1 i += 1 if start < i: - tokens.extend(self._tokenize(string[start:])) + self._tokenize(tokens, string[start:i]) assert tokens return tokens - cpdef Lexeme lookup(self, unicode string): - """Retrieve (or create, if not found) a Lexeme for a string, and return it. - - Args: - string (unicode): The string to be looked up. Must be unicode, not bytes. - - Returns: - lexeme (Lexeme): A reference to a lexical type. - """ - return self.lexicon.lookup(string) - - cdef list _tokenize(self, unicode string): - if string in self.cache: - return self.cache[string] - cdef list lexemes = [] - substrings = self._split(string) - for i, substring in enumerate(substrings): - lexemes.append(self.lexicon.lookup(substring)) - self.cache[string] = lexemes - return lexemes + cdef _tokenize(self, Tokens tokens, unicode string): + cdef list lexemes + if len(string) == 1: + lexemes = [self.lookup(string)] + elif string in self.cache: + lexemes = self.cache[string] + else: + lexemes = [] + substrings = self._split(string) + for i, substring in enumerate(substrings): + lexemes.append(self.lexicon.lookup(substring)) + self.cache[string] = lexemes + + cdef Lexeme lexeme + for lexeme in lexemes: + tokens.append(lexeme) cdef list _split(self, unicode string): """Find how to split a contiguous span of non-space characters into substrings. @@ -146,12 +160,14 @@ cdef class Lexicon: self._flag_features = flag_features self._string_features = string_features self._dict = {} + self.size = 0 cdef Lexeme word for string in words: word = Lexeme(string, probs.get(string, 0.0), clusters.get(string, 0), case_stats.get(string, {}), tag_stats.get(string, {}), self._string_features, self._flag_features) self._dict[string] = word + self.size += 1 cpdef Lexeme lookup(self, unicode string): """Retrieve (or create, if not found) a Lexeme for a string, and return it. @@ -169,4 +185,5 @@ cdef class Lexicon: cdef Lexeme word = Lexeme(string, 0, 0, {}, {}, self._string_features, self._flag_features) self._dict[string] = word + self.size += 1 return word diff --git a/spacy/orth.py b/spacy/orth.py index 5a0d79ef5..b7106d609 100644 --- a/spacy/orth.py +++ b/spacy/orth.py @@ -4,6 +4,10 @@ import unicodedata import math + +TAGS = 'adj adp adv conj det noun num pdt pos pron prt punct verb'.upper().split() + + # Binary string features def is_alpha(string, prob, case_stats, tag_stats): return string.isalpha() @@ -107,7 +111,7 @@ def non_sparse(string, prob, cluster, case_stats, tag_stats): return word_shape(string, prob, cluster, case_stats, tag_stats) -def asciify(string): +def asciied(string): '''"ASCIIfy" a Unicode string by stripping all umlauts, tildes, etc.''' # Snippet from # http://www.physic.ut.ee/~kkannike/english/prog/python/util/asciify/index.html diff --git a/spacy/tokens.pxd b/spacy/tokens.pxd new file mode 100644 index 000000000..006880794 --- /dev/null +++ b/spacy/tokens.pxd @@ -0,0 +1,9 @@ +cdef class Tokens: + cdef list lexemes + cpdef append(self, object lexeme) + + cpdef unicode string(self, size_t i) + cpdef double prob(self, size_t i) + cpdef size_t cluster(self, size_t i) + cpdef bint check_flag(self, size_t i, size_t flag_id) + cpdef unicode string_view(self, size_t i, size_t view_id) diff --git a/spacy/tokens.pyx b/spacy/tokens.pyx new file mode 100644 index 000000000..25d8e1939 --- /dev/null +++ b/spacy/tokens.pyx @@ -0,0 +1,39 @@ +cdef class Tokens: + """A sequence of references to Lexeme objects. + + The Tokens class provides fast and memory-efficient access to lexical features, + and can efficiently export the data to a numpy array. Specific languages + create their own Tokens subclasses, to provide more convenient access to + language-specific features. + + >>> from spacy.en import EN + >>> tokens = EN.tokenize('An example sentence.') + >>> tokens.string(0) + 'An' + >>> tokens.prob(0) > tokens.prob(1) + True + >>> tokens.can_noun(0) + False + >>> tokens.can_noun(1) + True + """ + def __cinit__(self): + self.lexemes = [] + + cpdef append(self, object lexeme): + self.lexemes.append(lexeme) + + cpdef unicode string(self, size_t i): + return self.lexemes[i].string + + cpdef double prob(self, size_t i): + return self.lexemes[i].prob + + cpdef size_t cluster(self, size_t i): + return self.lexemes[i].cluster + + cpdef bint check_flag(self, size_t i, size_t flag_id): + return self.lexemes[i].check_flag(flag_id) + + cpdef unicode string_view(self, size_t i, size_t view_id): + return self.lexemes[i].string_view(view_id)