import logging import os import sys import subprocess import threading import util class ForceAligner: def __init__(self, fwd_params, fwd_err, rev_params, rev_err): cdec_root = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__)))) fast_align = os.path.join(cdec_root, 'word-aligner', 'fast_align') atools = os.path.join(cdec_root, 'utils', 'atools') (fwd_T, fwd_m) = self.read_err(fwd_err) (rev_T, rev_m) = self.read_err(rev_err) fwd_cmd = [fast_align, '-i', '-', '-d', '-T', fwd_T, '-m', fwd_m, '-f', fwd_params] rev_cmd = [fast_align, '-i', '-', '-d', '-T', rev_T, '-m', rev_m, '-f', rev_params, '-r'] tools_cmd = [atools, '-i', '-', '-j', '-', '-c', 'grow-diag-final-and'] logging.info('Executing: {}'.format(' '.join(fwd_cmd))) self.fwd_align = util.popen_io(fwd_cmd) logging.info('Executing: {}'.format(' '.join(rev_cmd))) self.rev_align = util.popen_io(rev_cmd) logging.info('Executing: {}'.format(' '.join(tools_cmd))) self.tools = util.popen_io(tools_cmd) # Used to guarantee thread safety self.semaphore = threading.Semaphore() def align(self, source, target): '''Threadsafe''' return self.align_formatted('{} ||| {}'.format(source, target)) def align_formatted(self, line): '''Threadsafe''' self.semaphore.acquire() self.fwd_align.stdin.write('{}\n'.format(line)) self.rev_align.stdin.write('{}\n'.format(line)) # f words ||| e words ||| links ||| score fwd_line = self.fwd_align.stdout.readline().split('|||')[2].strip() rev_line = self.rev_align.stdout.readline().split('|||')[2].strip() self.tools.stdin.write('{}\n'.format(fwd_line)) self.tools.stdin.write('{}\n'.format(rev_line)) al_line = self.tools.stdout.readline().strip() self.semaphore.release() return al_line def close(self): self.fwd_align.stdin.close() self.rev_align.stdin.close() self.tools.stdin.close() def read_err(self, err): (T, m) = ('', '') for line in open(err): # expected target length = source length * N if 'expected target length' in line: m = line.split()[-1] # final tension: N elif 'final tension' in line: T = line.split()[-1] return (T, m)