modify files for packaging; thanks to universome

subword_nmt/apply_bpe.py

@@ -107,7 +107,13 @@ class BPE(object):
                                  for out_segments in isolate_glossary(segment, gloss)]
         return word_segments
 
-def create_parser():
+def create_parser(subparsers=None):
+
+    if subparsers:
+        parser = subparsers.add_parser('apply-bpe',
+            formatter_class=argparse.RawDescriptionHelpFormatter,
+            description="learn BPE-based word segmentation")
+    else:
         parser = argparse.ArgumentParser(
             formatter_class=argparse.RawDescriptionHelpFormatter,
             description="learn BPE-based word segmentation")

subword_nmt/command_line.py

@@ -0,0 +1,88 @@
+import io
+import sys
+import codecs
+import argparse
+
+from subword_nmt.learn_bpe import learn_bpe
+from subword_nmt.apply_bpe import BPE, read_vocabulary
+from subword_nmt.get_vocab import get_vocab
+from subword_nmt.segment_char_ngrams import segment_char_ngrams
+from subword_nmt.learn_joint_bpe_and_vocab import learn_joint_bpe_and_vocab
+
+from subword_nmt.learn_bpe import create_parser as create_learn_bpe_parser
+from subword_nmt.apply_bpe import create_parser as create_apply_bpe_parser
+from subword_nmt.get_vocab import create_parser as create_get_vocab_parser
+from subword_nmt.learn_joint_bpe_and_vocab import create_parser as create_learn_joint_bpe_and_vocab_parser
+from subword_nmt.segment_char_ngrams import create_parser as create_segment_char_ngrams_parser
+
+# hack for python2/3 compatibility
+argparse.open = io.open
+
+def main():
+    parser = argparse.ArgumentParser(
+        formatter_class=argparse.RawDescriptionHelpFormatter,
+        description="subword-nmt segmentation")
+    subparsers = parser.add_subparsers(dest='command', help='Command to run')
+
+    learn_bpe_parser = create_learn_bpe_parser(subparsers)
+    apply_bpe_parser = create_apply_bpe_parser(subparsers)
+    get_vocab_parser = create_get_vocab_parser(subparsers)
+    segment_char_ngrams_parser = create_segment_char_ngrams_parser(subparsers)
+    learn_joint_bpe_and_vocab_parser = create_learn_joint_bpe_and_vocab_parser(subparsers)
+
+    args = parser.parse_args()
+
+    if args.command == 'learn-bpe':
+        # read/write files as UTF-8
+        if args.input.name != '<stdin>':
+            args.input = codecs.open(args.input.name, encoding='utf-8')
+        if args.output.name != '<stdout>':
+            args.output = codecs.open(args.output.name, 'w', encoding='utf-8')
+
+        learn_bpe(args.input, args.output, args.symbols, args.min_frequency, args.verbose, is_dict=args.dict_input)
+    elif args.command == 'apply-bpe':
+        # read/write files as UTF-8
+        args.codes = codecs.open(args.codes.name, encoding='utf-8')
+        if args.input.name != '<stdin>':
+            args.input = codecs.open(args.input.name, encoding='utf-8')
+        if args.output.name != '<stdout>':
+            args.output = codecs.open(args.output.name, 'w', encoding='utf-8')
+        if args.vocabulary:
+            args.vocabulary = codecs.open(args.vocabulary.name, encoding='utf-8')
+
+        if args.vocabulary:
+            vocabulary = read_vocabulary(args.vocabulary, args.vocabulary_threshold)
+        else:
+            vocabulary = None
+
+        bpe = BPE(args.codes, args.merges, args.separator, vocabulary, args.glossaries)
+
+        for line in args.input:
+            args.output.write(bpe.process_line(line))
+
+    elif args.command == 'get-vocab':
+        if args.train_file.name != '<stdin>':
+            args.train_file = codecs.open(args.train_file.name, encoding='utf-8')
+        if args.vocab_file.name != '<stdout>':
+            args.vocab_file = codecs.open(args.vocab_file.name, 'w', encoding='utf-8')
+        get_vocab(args.train_file, args.vocab_file)
+    elif args.command == 'segment-char-ngrams':
+        segment_char_ngrams(args)
+    elif args.command == 'learn-joint-bpe-and-vocab':
+        learn_joint_bpe_and_vocab(args)
+    else:
+        raise Exception('Invalid command provided')
+
+
+if __name__ == '__main__':
+    # python 2/3 compatibility
+    if sys.version_info < (3, 0):
+        sys.stderr = codecs.getwriter('UTF-8')(sys.stderr)
+        sys.stdout = codecs.getwriter('UTF-8')(sys.stdout)
+        sys.stdin = codecs.getreader('UTF-8')(sys.stdin)
+    else:
+        sys.stderr = codecs.getwriter('UTF-8')(sys.stderr.buffer)
+        sys.stdout = codecs.getwriter('UTF-8')(sys.stdout.buffer)
+        sys.stdin = codecs.getreader('UTF-8')(sys.stdin.buffer)
+
+    main()

subword_nmt/get_vocab.py

@@ -3,12 +3,63 @@ from __future__ import print_function
 import sys
 from collections import Counter
 
+# hack for python2/3 compatibility
+from io import open
+argparse.open = open
+
+def create_parser(subparsers=None):
+
+    if subparsers:
+        parser = subparsers.add_parser('get-vocab',
+            formatter_class=argparse.RawDescriptionHelpFormatter,
+            description="Generates vocabulary")
+    else:
+        parser = subparsers.argparse.ArgumentParser(
+            formatter_class=argparse.RawDescriptionHelpFormatter,
+            description="Generates vocabulary")
+
+    parser.add_argument(
+        '--train_file', type=argparse.FileType('r'), default=sys.stdin,
+        metavar='PATH',
+        help="Input file (default: standard input).")
+
+    parser.add_argument(
+        '--vocab_file', type=argparse.FileType('w'), default=sys.stdout,
+        metavar='PATH',
+        help="Output file (default: standard output)")
+
+    return parser
+
+def get_vocab(train_file, vocab_file):
+
     c = Counter()
 
-for line in sys.stdin:
+    for line in train_file:
         for word in line.strip('\r\n ').split(' '):
             if word:
                 c[word] += 1
 
     for key,f in sorted(c.items(), key=lambda x: x[1], reverse=True):
-    print(key+" "+ str(f))
+        vocab_file.write(key+" "+ str(f) + "\n")
+
+if __name__ == "__main__":
+
+    # python 2/3 compatibility
+    if sys.version_info < (3, 0):
+        sys.stderr = codecs.getwriter('UTF-8')(sys.stderr)
+        sys.stdout = codecs.getwriter('UTF-8')(sys.stdout)
+        sys.stdin = codecs.getreader('UTF-8')(sys.stdin)
+    else:
+        sys.stderr = codecs.getwriter('UTF-8')(sys.stderr.buffer)
+        sys.stdout = codecs.getwriter('UTF-8')(sys.stdout.buffer)
+        sys.stdin = codecs.getreader('UTF-8')(sys.stdin.buffer)
+
+    parser = create_parser()
+    args = parser.parse_args()
+
+    if args.train_file.name != '<stdin>':
+        args.train_file = codecs.open(args.train_file.name, encoding='utf-8')
+    if args.vocab_file.name != '<stdout>':
+        args.vocab_file = codecs.open(args.vocab_file.name, 'w', encoding='utf-8')
+
+    get_vocab(args.train_file, args.vocab_file)

subword_nmt/learn_bpe.py

@@ -24,7 +24,13 @@ from collections import defaultdict, Counter
 from io import open
 argparse.open = open
 
-def create_parser():
+def create_parser(subparsers=None):
+
+    if subparsers:
+        parser = subparsers.add_parser('learn-bpe',
+            formatter_class=argparse.RawDescriptionHelpFormatter,
+            description="learn BPE-based word segmentation")
+    else:
         parser = argparse.ArgumentParser(
             formatter_class=argparse.RawDescriptionHelpFormatter,
             description="learn BPE-based word segmentation")
@@ -188,7 +194,7 @@ def prune_stats(stats, big_stats, threshold):
                 big_stats[item] = freq
 
 
-def main(infile, outfile, num_symbols, min_frequency=2, verbose=False, is_dict=False):
+def learn_bpe(infile, outfile, num_symbols, min_frequency=2, verbose=False, is_dict=False):
     """Learn num_symbols BPE operations from vocabulary, and write to outfile.
     """
 
@@ -252,4 +258,4 @@ if __name__ == '__main__':
     if args.output.name != '<stdout>':
         args.output = codecs.open(args.output.name, 'w', encoding='utf-8')
 
-    main(args.input, args.output, args.symbols, args.min_frequency, args.verbose, is_dict=args.dict_input)
+    learn_bpe(args.input, args.output, args.symbols, args.min_frequency, args.verbose, is_dict=args.dict_input)

subword_nmt/learn_joint_bpe_and_vocab.py

@@ -28,7 +28,13 @@ import apply_bpe
 from io import open
 argparse.open = open
 
-def create_parser():
+def create_parser(subparsers=None):
+
+    if subparsers:
+        parser = subparsers.add_parser('learn-joint-bpe-and-vocab',
+            formatter_class=argparse.RawDescriptionHelpFormatter,
+            description="learn BPE-based word segmentation")
+    else:
         parser = argparse.ArgumentParser(
             formatter_class=argparse.RawDescriptionHelpFormatter,
             description="learn BPE-based word segmentation")
@@ -48,7 +54,7 @@ def create_parser():
         '--separator', type=str, default='@@', metavar='STR',
         help="Separator between non-final subword units (default: '%(default)s'))")
     parser.add_argument(
-        '--write-vocabulary', type=argparse.FileType('w'), nargs = '+', default=None,
+        '--write-vocabulary', type=argparse.FileType('w'), required=True, nargs = '+', default=None,
         metavar='PATH', dest='vocab',
         help='Write to these vocabulary files after applying BPE. One per input text. Used for filtering in apply_bpe.py')
     parser.add_argument(
@@ -60,22 +66,7 @@ def create_parser():
 
     return parser
 
-
-
-if __name__ == '__main__':
-
-    # python 2/3 compatibility
-    if sys.version_info < (3, 0):
-        sys.stderr = codecs.getwriter('UTF-8')(sys.stderr)
-        sys.stdout = codecs.getwriter('UTF-8')(sys.stdout)
-        sys.stdin = codecs.getreader('UTF-8')(sys.stdin)
-    else:
-        sys.stderr = codecs.getwriter('UTF-8')(sys.stderr.buffer)
-        sys.stdout = codecs.getwriter('UTF-8')(sys.stdout.buffer)
-        sys.stdin = codecs.getreader('UTF-8')(sys.stdin.buffer)
-
-    parser = create_parser()
-    args = parser.parse_args()
+def learn_joint_bpe_and_vocab(args):
 
     if args.vocab and len(args.input) != len(args.vocab):
         sys.stderr.write('Error: number of input files and vocabulary files must match\n')
@@ -95,7 +86,7 @@ if __name__ == '__main__':
 
     # learn BPE on combined vocabulary
     with codecs.open(args.output.name, 'w', encoding='UTF-8') as output:
-        learn_bpe.main(vocab_list, output, args.symbols, args.min_frequency, args.verbose, is_dict=True)
+        learn_bpe.learn_bpe(vocab_list, output, args.symbols, args.min_frequency, args.verbose, is_dict=True)
 
     with codecs.open(args.output.name, encoding='UTF-8') as codes:
         bpe = apply_bpe.BPE(codes, separator=args.separator)
@@ -123,3 +114,23 @@ if __name__ == '__main__':
         for key, freq in sorted(vocab.items(), key=lambda x: x[1], reverse=True):
             vocab_file.write("{0} {1}\n".format(key, freq))
         vocab_file.close()
+
+
+if __name__ == '__main__':
+
+    # python 2/3 compatibility
+    if sys.version_info < (3, 0):
+        sys.stderr = codecs.getwriter('UTF-8')(sys.stderr)
+        sys.stdout = codecs.getwriter('UTF-8')(sys.stdout)
+        sys.stdin = codecs.getreader('UTF-8')(sys.stdin)
+    else:
+        sys.stderr = codecs.getwriter('UTF-8')(sys.stderr.buffer)
+        sys.stdout = codecs.getwriter('UTF-8')(sys.stdout.buffer)
+        sys.stdin = codecs.getreader('UTF-8')(sys.stdin.buffer)
+
+    parser = create_parser()
+    args = parser.parse_args()
+
+    assert(len(args.input) == len(args.vocab))
+
+    learn_joint_bpe_and_vocab(args)

subword_nmt/segment-char-ngrams.py

@@ -12,7 +12,13 @@ import argparse
 from io import open
 argparse.open = open
 
-def create_parser():
+def create_parser(subparsers=None):
+
+    if subparsers:
+        parser = subparsers.add_parser('segment-char-ngrams',
+            formatter_class=argparse.RawDescriptionHelpFormatter,
+            description="segment rare words into character n-grams")
+    else:
         parser = argparse.ArgumentParser(
             formatter_class=argparse.RawDescriptionHelpFormatter,
             description="segment rare words into character n-grams")
@@ -41,6 +47,25 @@ def create_parser():
 
     return parser
 
+def segment_char_ngrams(args):
+
+    vocab = [line.split()[0] for line in args.vocab if len(line.split()) == 2]
+    vocab = dict((y,x) for (x,y) in enumerate(vocab))
+
+    for line in args.input:
+      for word in line.split():
+        if word not in vocab or vocab[word] > args.shortlist:
+          i = 0
+          while i*args.n < len(word):
+            args.output.write(word[i*args.n:i*args.n+args.n])
+            i += 1
+            if i*args.n < len(word):
+              args.output.write(args.separator)
+            args.output.write(' ')
+        else:
+          args.output.write(word + ' ')
+      args.output.write('\n')
+
 
 if __name__ == '__main__':
 
@@ -64,19 +89,4 @@ if __name__ == '__main__':
     if args.output.name != '<stdout>':
         args.output = codecs.open(args.output.name, 'w', encoding='utf-8')
 
-    vocab = [line.split()[0] for line in args.vocab if len(line.split()) == 2]
-    vocab = dict((y,x) for (x,y) in enumerate(vocab))
-
-    for line in args.input:
-      for word in line.split():
-        if word not in vocab or vocab[word] > args.shortlist:
-          i = 0
-          while i*args.n < len(word):
-            args.output.write(word[i*args.n:i*args.n+args.n])
-            i += 1
-            if i*args.n < len(word):
-              args.output.write(args.separator)
-            args.output.write(' ')
-        else:
-          args.output.write(word + ' ')
-      args.output.write('\n')
+    segment_char_ngrams(args)

subword_nmt/tests/test_bpe.py

@@ -10,7 +10,7 @@ currentdir = os.path.dirname(os.path.abspath(inspect.getfile(inspect.currentfram
 parentdir = os.path.dirname(currentdir)
 sys.path.insert(0,parentdir)
 
-import learn_bpe
+from learn_bpe import learn_bpe
 from apply_bpe import BPE
 
 
@@ -19,7 +19,7 @@ class TestBPELearnMethod(unittest.TestCase):
     def test_learn_bpe(self):
         infile = codecs.open(os.path.join(currentdir,'data','corpus.en'), encoding='utf-8')
         outfile = codecs.open(os.path.join(currentdir,'data','bpe.out'), 'w', encoding='utf-8')
-        learn_bpe.main(infile, outfile, 1000)
+        learn_bpe(infile, outfile, 1000)
         infile.close()
         outfile.close()