EasyNLPnlp-389

BLEU Brevity Penalty Value

Problem

The BLEU brevity penalty is 1 when the candidate is at least as long as the reference and exp(1 - reference_length / candidate_length) otherwise.

Given the candidate and reference lengths, return the penalty.

Hint

Short candidates are penalized exponentially.

case 1

in: [10,10]

expected: 1

case 2

in: [5,10]

expected: 0.36787944117144233

case 3

in: [12,8]

expected: 1

Starter codePython

def bleu_brevity_penalty_value(candidate_length, reference_length):
    # Your code here
    pass

3 test cases · run your code against them in the editor