Super Fast GPU-based BLEU Computation

• Smoothed BLEU calculation (BLEU + 1)
• Return percentage of BLEU
• Based on Theano
• Super fast for computing bleus in batch
• Reference: https://arxiv.org/abs/1704.03169

Usage

bleu = GPUBLEUEvaluator()
# A sentence can be a list of number or string
sents = [
    [1, 2, 3, 4, 5, 3, 4, 1], 
    [2, 2, 2, 5, 7], 
    [1, 2, 3, 3, 4, 5, 1, 5, 6, 7, 4, 3, 3, 6]
]
ref = [[1, 2, 3, 4, 5, 7]]
print (bleu.evaluate(sents, ref))

[[ 0.58739489]
 [ 0.31610978]
 [ 0.23793663]]