theano-word2vec 0.2.2

word2vec using Theano and Lasagne

# theano-word2vec An implementation of Mikolov’s word2vec in Python 2 using Theano and Lasagne.

## About this package This package has been written with care for modularity of it’s components, with the hope that they will be re-usable in creating variations on standard word2vec. Soon I’ll provide full documentation with guidelines on customization and extension, as well as a tour of how the package is setup. For now, please enjoy this quickstart guide

## Quickstart NOTE: This package is only available for Python 2 right now.

### Install Install from the Python Package Index: `bash pip install theano-word2vec `

Alternatively, install a version you can hack on: `bash git clone https://github.com/enewe101/word2vec.git cd word2vec python setup.py develop `

### Use

The simplest way to train a word2vec embedding: `python >>> from word2vec import word2vec >>> embedder, dictionary = word2vec(files=['corpus/file1.txt', 'corpus/file2.txt']) ` Where the input files should be formatted with one sentence per line, with tokens space-separated.

Once trained, the embedder can be used to convert words to vectors: `python >>> tokens = 'A sentence to embed'.split() >>> token_ids = dictionary.get_ids(tokens) >>> vectors = word2vec_embedder.embed(token_ids) `

The word2vec() function exposes most of the basic parameters appearing in Mikolov’s skip-gram model based on noise contrastive estimation: `python >>> embedder, dictionary = word2vec( ... # directory in which to save embedding parameters (deepest dir created if doesn't exist) ... savedir='data/my-embedding', ... ... # List of files comprising the corpus ... files=['corpus/file1.txt', 'corpus/file2.txt'], ... ... # Include whole directories of files (deep files not included) ... directories=['corpus', 'corpus/additional'], ... ... # Indicate files to exclude using regexes ... skip=[re.compile('*.bk$'), re.compile('exclude-from-corpus')], ... ... # Number of passes through training corpus ... num_epochs=5, ... ... # Specify the mapping from tokens to ints (else create it automatically) ... unigram_dictionary=preexisting_dictionary, ... ... # Number of "noise" examples included for every "signal" example ... noise_ratio=15, ... ... # Relative probability of skip-gram sampling centered on query word ... kernel=[1,2,3,3,2,1], ... ... # Threshold used to calculate discard-probability for query words ... t=1.0e-5, ... ... # Size of minibatches during training ... batch_size = 1000, ... ... # Dimensionality of the embedding vector space ... num_embedding_dimensions = 500, ... ... # Initializer for embedding parameters (can be a numpy array too) ... word_embedding_init=lasagne.init.Normal(), ... ... # Initializer for context embedding parameters (can be numpy array) ... context_embedding_init=lasagne.init.Normal(), ... ... # Size of stochastic gradient descent steps during training ... learning_rate = 0.1, ... ... # Amount of Nesterov momentum during training ... momentum=0.9, ... ... # Print messages during training ... verbose=True, ... ... # Number of parrallel corpus-reading processes ... num_example_generators=3 ... ) `

For more customization, check out the documentation (soon) to see how to assemble your own training setup using the classes provided in word2vec.