bnlp-toolkit 2.3

BNLP is a natural language processing toolkit for Bengali Language

Bengali Natural Language Processing(BNLP)

BNLP is a natural language processing toolkit for Bengali Language. This tool will help you to tokenize Bengali text, Embedding Bengali words, Bengali POS Tagging, Construct Neural Model for Bengali NLP purposes.

NB: Any Researcher who refer this tool in his/her paper please let us know, we will include paper link here

Contents

• Current Features
• Installation
• Pretrained Model
• Tokenization
• Embedding
• POS Tagging
• NER
• Issue
• Contributor Guide
• Contributor List
• Documentation
• Notebook

Current Features

• Bengali Tokenization

  • SentencePiece Tokenizer
  • Basic Tokenizer
  • NLTK Tokenizer

• Bengali Word Embedding

  • Bengali Word2Vec
  • Bengali Fasttext
  • Bengali GloVe

• Bengali POS Tagging

• Bengali Name Entity Recognition

Installation

PIP installer(python 3.5, 3.6, 3.7 tested okay)

pip install bnlp_toolkit

Local Installer

$git clone https://github.com/sagorbrur/bnlp.git
$cd bnlp
$python setup.py install

Pretrained Model

Download Link

• Bengali SentencePiece
• Bengali Word2Vec
• Bengali FastText
• Bengali GloVe Wordvectors
• Bengali POS Tag model
• Bengali NER model

Training Details

• Sentencepiece, Word2Vec, Fasttext, GloVe model trained with Bengali Wikipedia Dump Dataset
  • Bengali Wiki Dump
• SentencePiece Training Vocab Size=50000
• Fasttext trained with total words = 20M, vocab size = 1171011, epoch=50, embedding dimension = 300 and the training loss = 0.318668,
• Word2Vec word embedding dimension = 300
• To Know Bengali GloVe Wordvector and training process follow this repository
• Bengali CRF POS Tagging was training with nltr dataset with 80% accuracy.
• Bengali CRF NER Tagging was train with this data with 90% accuracy.

Tokenization

• Bengali SentencePiece Tokenization

  • tokenization using trained model

    from bnlp.sentencepiece_tokenizer import SP_Tokenizer
    
    bsp = SP_Tokenizer()
    model_path = "./model/bn_spm.model"
    input_text = "আমি ভাত খাই। সে বাজারে যায়।"
    tokens = bsp.tokenize(model_path, input_text)
    print(tokens)
    text2id = bsp.text2id(model_path, input_text)
    print(text2id)
    id2text = bsp.id2text(model_path, text2id)
    print(id2text)
    

  • Training SentencePiece

    from bnlp.sentencepiece_tokenizer import SP_Tokenizer
    
    bsp = SP_Tokenizer()
    data = "test.txt"
    model_prefix = "test"
    vocab_size = 5
    bsp.train_bsp(data, model_prefix, vocab_size) 
    

• Basic Tokenizer

  from bnlp.basic_tokenizer import BasicTokenizer
  basic_t = BasicTokenizer()
  raw_text = "আমি বাংলায় গান গাই।"
  tokens = basic_t.tokenize(raw_text)
  print(tokens)
  
  # output: ["আমি", "বাংলায়", "গান", "গাই", "।"]
  

• NLTK Tokenization

  from bnlp.nltk_tokenizer import NLTK_Tokenizer
  
  text = "আমি ভাত খাই। সে বাজারে যায়। তিনি কি সত্যিই ভালো মানুষ?"
  bnltk = NLTK_Tokenizer()
  word_tokens = bnltk.word_tokenize(text)
  sentence_tokens = bnltk.sentence_tokenize(text)
  print(word_tokens)
  print(sentence_tokens)
  
  # output
  # word_token: ["আমি", "ভাত", "খাই", "।", "সে", "বাজারে", "যায়", "।", "তিনি", "কি", "সত্যিই", "ভালো", "মানুষ", "?"]
  # sentence_token: ["আমি ভাত খাই।", "সে বাজারে যায়।", "তিনি কি সত্যিই ভালো মানুষ?"]
  

Word Embedding

• Bengali Word2Vec

  • Generate Vector using pretrain model

    from bnlp.bengali_word2vec import Bengali_Word2Vec
    
    bwv = Bengali_Word2Vec()
    model_path = "model/bengali_word2vec.model"
    word = 'আমার'
    vector = bwv.generate_word_vector(model_path, word)
    print(vector.shape)
    print(vector)
    

  • Find Most Similar Word Using Pretrained Model

    from bnlp.bengali_word2vec import Bengali_Word2Vec
    
    bwv = Bengali_Word2Vec()
    model_path = "model/bengali_word2vec.model"
    word = 'আমার'
    similar = bwv.most_similar(model_path, word)
    print(similar)
    

  • Train Bengali Word2Vec with your own data

    from bnlp.bengali_word2vec import Bengali_Word2Vec
    bwv = Bengali_Word2Vec(True)
    data_file = "test.txt"
    model_name = "test_model.model"
    vector_name = "test_vector.vector"
    bwv.train_word2vec(data_file, model_name, vector_name)
    

• Bengali FastText

  • Generate Vector Using Pretrained Model

    from bnlp.bengali_fasttext import Bengali_Fasttext
    
    bft = Bengali_Fasttext()
    word = "গ্রাম"
    model_path = "model/bengali_fasttext.bin"
    word_vector = bft.generate_word_vector(model_path, word)
    print(word_vector.shape)
    print(word_vector)
    

  • Train Bengali FastText Model

    from bnlp.bengali_fasttext import Bengali_Fasttext
    
    bft = Bengali_Fasttext()
    data = "data.txt"
    model_name = "saved_model.bin"
    epoch = 50
    bft.train_fasttext(data, model_name, epoch)
    

• Bengali GloVe Word Vectors

  We trained glove model with bengali data(wiki+news articles) and published bengali glove word vectors
  You can download and use it on your different machine learning purposes.

  from bnlp.glove_wordvector import BN_Glove
  glove_path = "bn_glove.39M.100d.txt"
  word = "গ্রাম"
  bng = BN_Glove()
  res = bng.closest_word(glove_path, word)
  print(res)
  vec = bng.word2vec(glove_path, word)
  print(vec)
  

Bengali POS Tagging

• Bengali CRF POS Tagging

  • Find Pos Tag Using Pretrained Model

    from bnlp.pos import POS
    bn_pos = POS()
    model_path = "model/bn_pos.pkl"
    text = "আমি ভাত খাই।"
    res = bn_pos.tag(model_path, text)
    print(res)
    # [('আমি', 'PPR'), ('ভাত', 'NC'), ('খাই', 'VM'), ('।', 'PU')]
    

  • Train POS Tag Model

    from bnlp.pos import POS
    bn_pos = POS()
    model_name = "pos_model.pkl"
    tagged_sentences = [[('রপ্তানি', 'JJ'), ('দ্রব্য', 'NC'), ('-', 'PU'), ('তাজা', 'JJ'), ('ও', 'CCD'), ('শুকনা', 'JJ'), ('ফল', 'NC'), (',', 'PU'), ('আফিম', 'NC'), (',', 'PU'), ('পশুচর্ম', 'NC'), ('ও', 'CCD'), ('পশম', 'NC'), ('এবং', 'CCD'),('কার্পেট', 'NC'), ('৷', 'PU')], [('মাটি', 'NC'), ('থেকে', 'PP'), ('বড়জোর', 'JQ'), ('চার', 'JQ'), ('পাঁচ', 'JQ'), ('ফুট', 'CCL'), ('উঁচু', 'JJ'), ('হবে', 'VM'), ('৷', 'PU')]]
    
    bn_pos.train(model_name, tagged_sentences)
    

Bengali NER

• Bengali CRF NER

  • Find NER Tag Using Pretrained Model

    from bnlp.ner import NER
    bn_ner = NER()
    model_path = "model/bn_ner.pkl"
    text = "সে ঢাকায় থাকে।"
    result = bn_ner.tag(model_path, text)
    print(result)
    # [('সে', 'O'), ('ঢাকায়', 'S-LOC'), ('থাকে', 'O')]
    

  • Train NER Tag Model

    from bnlp.ner import NER
    bn_ner = NER()
    model_name = "ner_model.pkl"
    tagged_sentences = [[('ত্রাণ', 'O'),('ও', 'O'),('সমাজকল্যাণ', 'O'),('সম্পাদক', 'S-PER'),('সুজিত', 'B-PER'),('রায়', 'I-PER'),('নন্দী', 'E-PER'),('প্রমুখ', 'O'),('সংবাদ', 'O'),('সম্মেলনে', 'O'),('উপস্থিত', 'O'),('ছিলেন', 'O')], [('ত্রাণ', 'O'),('ও', 'O'),('সমাজকল্যাণ', 'O'),('সম্পাদক', 'S-PER'),('সুজিত', 'B-PER'),('রায়', 'I-PER'),('নন্দী', 'E-PER'),('প্রমুখ', 'O'),('সংবাদ', 'O'),('সম্মেলনে', 'O'),('উপস্থিত', 'O'),('ছিলেন', 'O')], [('ত্রাণ', 'O'),('ও', 'O'),('সমাজকল্যাণ', 'O'),('সম্পাদক', 'S-PER'),('সুজিত', 'B-PER'),('রায়', 'I-PER'),('নন্দী', 'E-PER'),('প্রমুখ', 'O'),('সংবাদ', 'O'),('সম্মেলনে', 'O'),('উপস্থিত', 'O'),('ছিলেন', 'O')]]
    
    bn_per.train(model_name, tagged_sentences)
    

Issue

• if ModuleNotFoundError: No module named 'fasttext' problem arise please do the next line

pip install fasttext

• if nltk issue arise please do the following line before importing bnlp

import nltk
nltk.download("punkt")

Contributor Guide

Check CONTRIBUTING.md page for details.

Thanks To

• Semantics Lab

Contributor List

Extra Contributor

• Mehadi Hasan Menon
• Kazal Chandra Barman