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#!/usr/bin/env python
import argparse
import os
import logging
import configobj
import cdec.sa
MAX_PHRASE_LENGTH = 4
def precompute(f_sa, max_len, max_nt, max_size, min_gap, rank1, rank2):
lcp = cdec.sa.LCP(f_sa)
stats = sorted(lcp.compute_stats(MAX_PHRASE_LENGTH), reverse=True)
precomp = cdec.sa.Precomputation(from_stats=stats,
fsarray=f_sa,
precompute_rank=rank1,
precompute_secondary_rank=rank2,
max_length=max_len,
max_nonterminals=max_nt,
train_max_initial_size=max_size,
train_min_gap_size=min_gap)
return precomp
def main():
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger('cdec.sa.compile')
parser = argparse.ArgumentParser(description='Compile a corpus into a suffix array.')
parser.add_argument('--maxnt', '-n', type=int, default=2,
help='Maximum number of non-terminal symbols')
parser.add_argument('--maxlen', '-l', type=int, default=5,
help='Maximum number of terminals')
parser.add_argument('--maxsize', '-s', type=int, default=15,
help='Maximum rule span')
parser.add_argument('--mingap', '-g', type=int, default=1,
help='Minimum gap size')
parser.add_argument('--rank1', '-r1', type=int, default=100,
help='Number of pre-computed frequent patterns')
parser.add_argument('--rank2', '-r2', type=int, default=10,
help='Number of pre-computed super-frequent patterns)')
parser.add_argument('-c', '--config', default='/dev/stdout',
help='Output configuration')
parser.add_argument('-o', '--output', required=True,
help='Output path')
parser.add_argument('-f', '--source', required=True,
help='Source language corpus')
parser.add_argument('-e', '--target', required=True,
help='Target language corpus')
parser.add_argument('-a', '--alignment', required=True,
help='Bitext word alignment')
args = parser.parse_args()
param_names = ("max_len", "max_nt", "max_size", "min_gap", "rank1", "rank2")
params = (args.maxlen, args.maxnt, args.maxsize, args.mingap, args.rank1, args.rank2)
if not os.path.exists(args.output):
os.mkdir(args.output)
f_sa_bin = os.path.join(args.output, 'f.sa.bin')
e_bin = os.path.join(args.output, 'e.bin')
precomp_file = 'precomp.{0}.{1}.{2}.{3}.{4}.{5}.bin'.format(*params)
precomp_bin = os.path.join(args.output, precomp_file)
a_bin = os.path.join(args.output, 'a.bin')
lex_bin = os.path.join(args.output, 'lex.bin')
logger.info('Compiling source suffix array')
f_sa = cdec.sa.SuffixArray(from_text=args.source)
f_sa.write_binary(f_sa_bin)
logger.info('Compiling target data array')
e = cdec.sa.DataArray(from_text=args.target)
e.write_binary(e_bin)
logger.info('Precomputing frequent phrases')
precompute(f_sa, *params).write_binary(precomp_bin)
logger.info('Compiling alignment')
a = cdec.sa.Alignment(from_text=args.alignment)
a.write_binary(a_bin)
logger.info('Compiling bilexical dictionary')
lex = cdec.sa.BiLex(from_data=True, alignment=a, earray=e, fsarray=f_sa)
lex.write_binary(lex_bin)
# Write configuration
config = configobj.ConfigObj(args.config, unrepr=True)
config['f_sa_file'] = f_sa_bin
config['e_file'] = e_bin
config['a_file'] = a_bin
config['lex_file'] = lex_bin
config['precompute_file'] = precomp_bin
for name, value in zip(param_names, params):
config[name] = value
config.write()
if __name__ == '__main__':
main()
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