# -*- coding: utf-8 -*-
# License: FreeBSD License or The BSD 2-Clause License
# Copyright (c) 2012, Leo Jiang
# All rights reserved.
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# this list of conditions and the following disclaimer.
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# Author: Leo Jiang <leo.jiang.dev@gmail.com>
# pylint: disable=I0011,C0301
"""
Predicate Module: Sentences Ratio
"""
[docs]def validate(step):
return True
[docs]def predicate(source, target, constraint):
"""Return True if the sentences ratio is beyond the threshold.
sentences ratio = source length / target length or target length / source length
The threshold of ratio in moses system is 9.
"""
len_s = len(source.split(' '))
len_t = len(target.split(' '))
ratio = (float(len_s) / len_t) if len_s > len_t else (float(len_t) / len_s)
return True if ratio > constraint["ratio"] else False