The lexicons_builder package aims to provide a basic API to create lexicons related to specific words.

Key principle: Given the input words, it will look for synonyms or neighboors in the dictionnaries or in the NLP model. For each of the new retreiven terms, it will look again for its neighboors or synonyms and so on..

The general method is implemented on 3 different supports:

1. Synonyms dictionnaries (See list of the dictionnaries : ref:here <list_dictionnaries.rst>)
2. NLP language models
3. WordNet (or WOLF)

Output can be text file, xlsx file, turtle file or a Graph object. See <Quickstart> section for examples.

Full documentation available on readthedocs

Feel free to raise an issue on GitHub if something isn't working for you.

It is recommanded to use a virtual environment.

$ python -m venv env
$ source env/bin/activate
$ pip install lexicons-builder

To install the module from source:

$ pip install git+git://github.com/GuillaumeLNB/lexicons_builder

Here's a non exhaustive list of websites where you can download NLP models manually. The models should be in word2vec or fasttext format.

>>> import nltk
>>> nltk.download()

$ # download WOLF (French wordnet if needed)
$ wget https://gforge.inria.fr/frs/download.php/file/33496/wolf-1.0b4.xml.bz2
$ # (and extract it)
$ bzip2 -d wolf-1.0b4.xml.bz2

To get words from input words through CLI, run

$ python -m lexicons_builder <words>  \
      --lang <LANG>                 \
      --out-file <OUTFILE>          \
      --format <FORMAT>             \
      --depth <DEPTH>               \
      --nlp-model <NLP_MODEL_PATHS> \
      --web                         \
      --wordnet                     \
      --wolf-path <WOLF_PATH>       \
      --strict

With:

• <words> The word(s) we want to get synonyms from
• <LANG> The word language (eg: fr, en, nl, ...)
• <DEPTH> The depth we want to dig in the models, websites, ...
• <OUTFILE> The file where the results will be stored
• <FORMAT> The wanted output format (txt with indentation, ttl or xlsx)

At least ONE of the following options is needed:

• --nlp-model <NLP_MODEL_PATHS> The path to the nlp model(s)
• --web Search online for synonyms
• --wordnet Search on WordNet using nltk
• --wolf-path <WOLF_PATH> The path to WOLF (French wordnet)

Optional

• --strict remove non relevant words

Eg: if we want to look for related terms linked to 'eat' and 'drink' on wordnet at a depth of 2, excecute:

$ python -m lexicons_builder eat drink  \
      --lang        en                  \
      --out-file    test_en.txt         \
      --format      txt                 \
      --depth       1                   \
      --wordnet
$ Note the indentation is linked to the depth a which the word was found
$ head test_en.txt
  drink
  eat
    absorb
    ade
    aerophagia
    alcohol
    alcoholic_beverage
    alcoholic_drink
    banquet
    bar_hop
    belt_down
    beverage
    bi
  ...

To get related terms interactively through Python, run

>>> from lexicons_builder import build_lexicon
>>> # search for related terms of 'book' and 'read' in English at depth 1 online
>>> output = build_lexicon(["book", "read"], 'en', 1, web=True)
...
>>> # we then get a graph object
>>> # output as a list
>>> output.to_list()
['PS', 'accept', 'accommodate', 'according to the rules', 'account book', 'accountability', 'accountancy', 'accountant', 'accounting', 'accounts', 'accuse', 'acquire', 'act', 'adjudge', 'admit', 'adopt', 'afl', 'agree', 'aim', "al-qur'an", 'album', 'allege', 'allocate', 'allow', 'analyse', 'analyze', 'annuaire', 'anthology', 'appear in reading', 'apply', 'appropriate', 'arrange', 'arrange for', 'arrest', 'articulate', 'ascertain' ...
>>> # output as rdf/turtle
>>> print(output)
@prefix ns1: <http://taxref.mnhn.fr/lod/property/> .
@prefix ns2: <urn:default:baseUri:#> .
@prefix ns3: <http://www.w3.org/2004/02/skos/core#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

ns2:PS ns1:isSynonymOf ns2:root_word_uri ;
    ns3:prefLabel "PS" ;
    ns2:comesFrom <synonyms.com> ;
    ns2:depth 1 .

ns2:accept ns1:isSynonymOf ns2:root_word_uri ;
    ns3:prefLabel "accept" ;
    ns2:comesFrom <synonyms.com> ;
    ns2:depth 1 .
...

>>> # output to an indented file
>>> output.to_text_file("filename.txt")
>>> with open("filename.txt") as f:
...     print(f.read(1000))
...
read
book
  PS
  accept
  accommodate
  according to the rules
  account book
  accountability
...
>>> # output to xslx file
>>> output.to_xlsx_file("results.xlsx")

>>> # full search with 2 nlp models, wordnet and on the web
>>> # download and extract google word2vec model
>>> # from https://github.com/mmihaltz/word2vec-GoogleNews-vectors
>>>
>>> # download and extract FastText models
>>> # from https://fasttext.cc/docs/en/english-vectors.html
>>>
>>> nlp_models = ["GoogleNews-vectors-negative300.bin", "wiki-news-300d-1M.vec"]
>>> output = build_lexicon(["book", "letter"], "en", 1, web=True, wordnet=True, nlp_model_paths=nlp_models)
>>> # can take a while
>>> len(output.to_list())
614
>>> # deleting non relevant words
>>> output.pop_non_relevant_words()
>>> len(output.to_list())
57