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import os
import subprocess
import util
class Decoder:
def close(self):
self.decoder.stdin.close()
def decode(self, sentence, grammar):
input = '<seg grammar="{g}">{s}</seg>\n'.format(s=sentence, g=grammar)
self.decoder.stdin.write(input)
return self.decoder.stdout.readline().strip()
class CdecDecoder(Decoder):
def __init__(self, config, weights):
cdec_root = os.path.dirname(os.path.dirname(os.path.dirname(__file__)))
decoder = os.path.join(cdec_root, 'decoder', 'cdec')
decoder_cmd = [decoder, '-c', config, '-w', weights]
self.decoder = util.popen_io(decoder_cmd)
class MIRADecoder(Decoder):
def __init__(self, config, weights):
cdec_root = os.path.dirname(os.path.dirname(os.path.dirname(__file__)))
mira = os.path.join(cdec_root, 'training', 'mira', 'kbest_cut_mira')
# optimizer=2 step=0.001 best=500, k=500, uniq, stream
mira_cmd = [mira, '-c', config, '-w', weights, '-o', '2', '-C', '0.001', '-b', '500', '-k', '500', '-u', '-t']
self.decoder = util.popen_io(mira_cmd)
def update(self, sentence, grammar, reference):
input = '<seg grammar="{g}">{s}</seg> ||| {r}\n'.format(s=sentence, g=grammar, r=reference)
self.decoder.stdin.write(input)
return self.decoder.stdout.readline().strip()
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