sudachi.rs

sudachi.rs - English README

sudachi.rs is a Rust implementation of Sudachi, a Japanese morphological analyzer.

日本語 README.

Python implementation is also available: SudachiPy Documentation.

IMPORTANT v0.7 introduces a new dictionary format (V1). When upgrading from v0.6, you need to update the system dictionary and rebuild all user dictionaries against the exact system dictionary that will be used at runtime. The URL of the dictionary distribution page is also changed. See the migration guide.

CAUTION Release v0.7.* is unstable. It may include breaking changes even between patch versions, so please pin the exact version and review release notes carefully before upgrading.

TL;DR

Install Python version

pip install --upgrade 'sudachipy>=0.6.11'

or Rust version

$ git clone https://github.com/WorksApplications/sudachi.rs.git
$ cd ./sudachi.rs

$ cargo build --release
$ cargo install --path sudachi-cli/
$ ./fetch_dictionary.sh

$ echo "高輪ゲートウェイ駅" | sudachi
高輪ゲートウェイ駅  名詞,固有名詞,一般,*,*,*    高輪ゲートウェイ駅
EOS

Example

Multi-granular Tokenization

$ echo 選挙管理委員会 | sudachi
選挙管理委員会  名詞,固有名詞,一般,*,*,*        選挙管理委員会
EOS

$ echo 選挙管理委員会 | sudachi --mode A
選挙    名詞,普通名詞,サ変可能,*,*,*    選挙
管理    名詞,普通名詞,サ変可能,*,*,*    管理
委員    名詞,普通名詞,一般,*,*,*        委員
会      名詞,普通名詞,一般,*,*,*        会
EOS

Normalized Form

$ echo 打込む かつ丼 附属 vintage | sudachi
打込む  動詞,一般,*,*,五段-マ行,終止形-一般     打ち込む
        空白,*,*,*,*,*
かつ丼  名詞,普通名詞,一般,*,*,*        カツ丼
        空白,*,*,*,*,*
附属    名詞,普通名詞,サ変可能,*,*,*    付属
        空白,*,*,*,*,*
vintage 名詞,普通名詞,一般,*,*,*        ビンテージ
EOS

Wakati (space-delimited surface form) Output

$ cat lemon.txt
えたいの知れない不吉な塊が私の心を始終圧えつけていた。
焦躁と言おうか、嫌悪と言おうか――酒を飲んだあとに宿酔があるように、酒を毎日飲んでいると宿酔に相当した時期がやって来る。
それが来たのだ。これはちょっといけなかった。

$ sudachi --wakati lemon.txt
えたい の 知れ ない 不吉 な 塊 が 私 の 心 を 始終 圧え つけ て い た 。
焦躁 と 言おう か 、 嫌悪 と 言おう か ― ― 酒 を 飲ん だ あと に 宿酔 が ある よう に 、 酒 を 毎日 飲ん で いる と 宿酔 に 相当 し た 時期 が やっ て 来る 。
それ が 来 た の だ 。 これ は ちょっと いけ なかっ た 。

Setup

You need sudachi.rs, default plugins, and a dictionary. (This crate don’t include dictionary.)

1. Get the source code

git clone https://github.com/WorksApplications/sudachi.rs.git

2. Download a Sudachi Dictionary

Sudachi requires a dictionary to operate. There are three types of dictionaries.

• Small: includes only the vocabulary of UniDic
• Core: includes basic vocabulary (default)
• Full: includes miscellaneous proper nouns

Click here for pre-built dictionaries. Download and unzip a dictionary zip file (choose one of small, core, full of any version), and place the system_*.dic file somewhere. By the default setting file, sudachi.rs assumes that it is placed at $PWD/system.dic.

For more details, see WorksApplications/SudachiDict.

Download Script

Optionally, you can use the fetch_dictionary.sh shell script to download a dictionary and install it to ./system.dic (overrides).

# fetch latest core dictionary
./fetch_dictionary.sh

# fetch dictionary of specified version, type, and format
./fetch_dictionary.sh 20241021 small v1

3. Build

cargo build --release

Build (bake dictionary into binary)

This was un-implemented and does not work currently, see https://github.com/WorksApplications/sudachi.rs/issues/35

Specify the bake_dictionary feature to embed a dictionary into the binary. The sudachi executable will contain the dictionary binary. The baked dictionary will be used if no one is specified via cli option or setting file.

You must specify the path the dictionary file in the SUDACHI_DICT_PATH environment variable when building. SUDACHI_DICT_PATH is relative to the sudachi.rs directory (or absolute).

Example on Unix-like system:

# Download dictionary to resources/system.dic
$ ./fetch_dictionary.sh

# Build with bake_dictionary feature (relative path)
$ env SUDACHI_DICT_PATH=resources/system.dic cargo build --release --features bake_dictionary

# or

# Build with bake_dictionary feature (absolute path)
$ env SUDACHI_DICT_PATH=/path/to/my-sudachi.dic cargo build --release --features bake_dictionary

4. Install

$ cd sudachi.rs/
$ cargo install --path sudachi-cli/

$ which sudachi
/Users/<USER>/.cargo/bin/sudachi

$ sudachi -h
sudachi 0.8.2
A Japanese tokenizer
...

Usage as a command

$ sudachi -h
A Japanese tokenizer

Usage: sudachi [OPTIONS] [FILE] [COMMAND]

Commands:
  build
          Builds system dictionary
  ubuild
          Builds user dictionary
  dump

  help
          Print this message or the help of the given subcommand(s)

Arguments:
  [FILE]
          Input text file: If not present, read from STDIN

Options:
  -r, --config-file <CONFIG_FILE>
          Path to the setting file in JSON format
  -p, --resource_dir <RESOURCE_DIR>
          Path to the root directory of resources
  -m, --mode <MODE>
          Split unit: "A" (short), "B" (middle), or "C" (Named Entity) [default: C]
  -o, --output <OUTPUT_FILE>
          Output text file: If not present, use stdout
  -a, --all
          Prints all fields
  -w, --wakati
          Outputs only surface form
  -d, --debug
          Debug mode: Print the debug information
  -l, --dict <DICTIONARY_PATH>
          Path to sudachi dictionary. If None, it refer config and then baked dictionary
      --split-sentences <SPLIT_SENTENCES>
          How to split sentences [default: yes]
  -h, --help
          Print help (see more with '--help')
  -V, --version
          Print version

Output

Columns are tab separated.

• Surface
• Part-of-Speech Tags (comma separated)
• Normalized Form

When you add the -a (--all) flag, it additionally outputs

• Dictionary Form
• Reading Form
• Dictionary ID
  • 0 for the system dictionary
  • 1 and above for the user dictionaries
  • -1 if a word is Out-of-Vocabulary (not in the dictionary)
• Synonym group IDs
• (OOV) if a word is Out-of-Vocabulary (not in the dictionary)

$ echo "外国人参政権" | sudachi -a
外国人参政権    名詞,普通名詞,一般,*,*,*        外国人参政権    外国人参政権    ガイコクジンサンセイケン      0       []
EOS

echo "阿quei" | sudachipy -a
阿      名詞,普通名詞,一般,*,*,*        阿      阿              -1      []      (OOV)
quei    名詞,普通名詞,一般,*,*,*        quei    quei            -1      []      (OOV)
EOS

When you add -w (--wakati) flag, it outputs space-delimited surface instead.

$ echo "外国人参政権" | sudachi -m A -w
外国 人 参政 権

API

See API reference page.

ToDo

• Out of Vocabulary handling
• Easy dictionary file install & management, similar to SudachiPy
• Registration to crates.io

References

Sudachi

• WorksApplications/Sudachi
• WorksApplications/SudachiDict
• WorksApplications/SudachiPy
• msnoigrs/gosudachi

Morphological Analyzers in Rust

• agatan/yoin: A Japanese Morphological Analyzer written in pure Rust
• wareya/notmecab-rs: notmecab-rs is a very basic mecab clone, designed only to do parsing, not training.

Logo

• Sudachi Logo
• Crab illustration: Pixabay