Module: SpaCy

Defined in:
lib/rbbt/nlp/spaCy.rb

Constant Summary collapse

TOKEN_PROPERTIES = 
%w(lemma_ is_punct is_space shape_ pos_ tag_)
CHUNK_PROPERTIES = 
%w(lemma_)

Class Method Summary collapse

Class Method Details

.chunk_dep_graph(text, reverse = false, lang = 'en_core_web_md') ⇒ Object 



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# File 'lib/rbbt/nlp/spaCy.rb', line 116

def self.chunk_dep_graph(text, reverse = false, lang = 'en_core_web_md')
  associations = dep_graph(text, false, lang)

  chunks = self.chunk_segments(text, lang)
  tokens = self.segments(text, lang)
  index = Segment.index(tokens + chunks)

  chunks.each do |chunk|
    target_token_ids = chunk.dep.split(";").collect do|dep|
      type, target_pos = dep.split("->")
      index[target_pos.to_i]
    end.flatten

    target_tokens = target_token_ids.collect do |target_token_id|
      range = Range.new(*target_token_id.split(":").last.split("..").map(&:to_i))
      range.collect do |pos|
        index[pos]
      end.uniq
    end.flatten
    associations[chunk.segid] = target_tokens
  end

  if reverse
    old = associations.dup
    old.each do |s,ts|
      ts.each do |t|
        associations[t] ||= []
        associations[t] += [s] unless associations[t].include?(s)
      end
    end
  end

  associations
end

.chunk_segments(text, lang = 'en_core_web_sm') ⇒ Object 



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# File 'lib/rbbt/nlp/spaCy.rb', line 67

def self.chunk_segments(text, lang = 'en_core_web_sm')
  docid = text.docid if Document === text
  corpus = text.corpus if Document === text 
  chunks = self.chunks(text, lang).collect do |chunk|
    info = {}
    CHUNK_PROPERTIES.each do |p|
      info[p] = chunk.instance_eval(p.to_s)
    end
    start = eend =  nil
    deps = []
    RbbtPython.iterate chunk.__iter__ do |token|
      start = token.idx if start.nil?
      eend = start + chunk.text.length if eend.nil?
      deps << token.idx.to_s + ":" + token.dep_ + "->" + token.head.idx.to_s if token.head.idx < start || token.head.idx > eend
    end
    info[:type] = "SpaCy"
    info[:offset] = chunk.__iter__.__next__.idx
    info[:dep] = deps * ";"
    info[:docid] = docid if docid
    info[:corpus] = corpus if corpus
    SpaCySpan.setup(chunk.text, info)
  end

  chunks
end

.chunks(text, lang = 'en_core_web_sm') ⇒ Object 



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# File 'lib/rbbt/nlp/spaCy.rb', line 33

def self.chunks(text, lang = 'en_core_web_sm')

  tokens = []
  nlp = nlp(lang)

  doc = nlp.call(text)
  chunks = doc.noun_chunks.__iter__

  RbbtPython.iterate chunks do |item|
    tokens << item
  end

  tokens
end

.config(base, target = nil) ⇒ Object 



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# File 'lib/rbbt/nlp/spaCy.rb', line 166

def self.config(base, target = nil)
  TmpFile.with_file(base) do |baseconfig|
    if target
      CMD.cmd(:spacy, "init fill-config #{baseconfig} #{target}")
    else
      TmpFile.with_file do |tmptarget|
        CMD.cmd(:spacy, "init fill-config #{baseconfig} #{tmptarget}")
        Open.read(targetconfig)
      end
    end
  end
end

.dep_graph(text, reverse = false, lang = 'en_core_web_md') ⇒ Object 



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# File 'lib/rbbt/nlp/spaCy.rb', line 93

def self.dep_graph(text, reverse = false, lang = 'en_core_web_md')
  tokens = self.segments(text, lang)
  index = Segment.index(tokens)
  associations = {}
  tokens.each do |token|
    type, target_pos = token.dep.split("->")
    target_tokens = index[target_pos.to_i]
    associations[token.segid] = target_tokens
  end

  if reverse
    old = associations.dup
    old.each do |s,ts|
      ts.each do |t|
        associations[t] ||= []
        associations[t] += [s] unless associations[t].include?(s)
      end
    end
  end

  associations
end

.nlp(lang = 'en_core_web_md') ⇒ Object 



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# File 'lib/rbbt/nlp/spaCy.rb', line 12

def self.nlp(lang = 'en_core_web_md')
  @@nlp ||= {}
  @@nlp[lang] ||= RbbtPython.run :spacy do
    spacy.load(lang)
  end
end

.paths(text, source, target, reverse = true, lang = 'en_core_web_md') ⇒ Object 



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# File 'lib/rbbt/nlp/spaCy.rb', line 151

def self.paths(text, source, target, reverse = true, lang = 'en_core_web_md')
  graph = SpaCy.chunk_dep_graph(text, reverse, lang)

  chunk_index = Segment.index(SpaCy.chunk_segments(text, lang))

  source_id = chunk_index[source.offset.to_i].first || source.segid
  target_id = chunk_index[target.offset.to_i].first || target.segid

  path = Paths.dijkstra(graph, source_id, [target_id])

  return nil if path.nil?

  path.reverse
end

.segments(text, lang = 'en_core_web_sm') ⇒ Object 



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# File 'lib/rbbt/nlp/spaCy.rb', line 48

def self.segments(text, lang = 'en_core_web_sm')
  docid = text.docid if Document === text
  corpus = text.corpus if Document === text 
  tokens = self.tokens(text, lang).collect do |token|
    info = {}
    TOKEN_PROPERTIES.each do |p|
      info[p] = token.instance_eval(p.to_s)
    end
    info[:type] = "SpaCy"
    info[:offset] = token.idx
    info[:dep] = token.dep_ + "->" + token.head.idx.to_s
    info[:docid] = docid if docid
    info[:corpus] = corpus if corpus
    SpaCyToken.setup(token.text, info)
  end

  tokens
end

.tokens(text, lang = 'en_core_web_sm') ⇒ Object 



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# File 'lib/rbbt/nlp/spaCy.rb', line 19

def self.tokens(text, lang = 'en_core_web_sm')

  tokens = []

  nlp = nlp(lang)
  doc = nlp.call(text)

  doc.__len__.times do |i|
    tokens << doc.__getitem__(i)
  end

  tokens
end