Suika

Suika 🍉 is a Japanese morphological analyzer written in pure Ruby.

Installation

Add this line to your application's Gemfile:

gem 'suika'

And then execute:

$ bundle install

Or install it yourself as:

$ gem install suika

Usage

require 'suika'

tagger = Suika::Tagger.new
tagger.parse('すもももももももものうち').each { |token| puts token }

# すもも  名詞,一般,*,*,*,*,すもも,スモモ,スモモ
# も      助詞,係助詞,*,*,*,*,も,モ,モ
# もも    名詞,一般,*,*,*,*,もも,モモ,モモ
# も      助詞,係助詞,*,*,*,*,も,モ,モ
# もも    名詞,一般,*,*,*,*,もも,モモ,モモ
# の      助詞,連体化,*,*,*,*,の,ノ,ノ
# うち    名詞,非自立,副詞可能,*,*,*,うち,ウチ,ウチ

Since the Tagger class loads the binary dictionary at initialization, it is recommended to reuse the instance.

tagger = Suika::Tagger.new

sentences.each do |sentence|
  result = tagger.parse(sentence)

  # ...
end

Test

Suika was able to parse all sentences in the Livedoor news corpus without any error.

require 'suika'

tagger = Suika::Tagger.new

Dir.glob('ldcc-20140209/text/*/*.txt').each do |filename|
  File.foreach(filename) do |sentence|
    sentence.strip!
    puts tagger.parse(sentence) unless sentence.empty?
  end
end

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/yoshoku/suika. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

License

The gem is available as open source under the terms of the BSD-3-Clause License. In addition, the gem includes binary data generated from mecab-ipadic. The details of the license can be found in LICENSE.txt and NOTICE.txt.

Respect

• Taku Kudo is the author of MeCab that is the most famous morphological analyzer in Japan. MeCab is one of the great software in natural language processing. Suika is created with reference to the book on morphological analysis written by Dr. Kudo.
• Tomoko Uchida is the author of Janome that is a Japanese morphological analysis engine written in pure Python. Suika is heavily influenced by Janome's idea to include the built-in dictionary and language model. Janome, a morphological analyzer written in scripting language, gives me the courage to develop Suika.