preprocess needs to use lower option

Author: bmccann

OpenNMT/onmt/Dict.py

@@ -6,7 +6,7 @@ def __init__(self, data=None, lower=False):
  self.idxToLabel = {}
  self.labelToIdx = {}
  self.frequencies = {}
- self.lower = True
+ self.lower = lower
 
  # Special entries will not be pruned.
  self.special = []

OpenNMT/preprocess.py

@@ -50,7 +50,7 @@
 
 def makeVocabulary(filename, size):
  vocab = onmt.Dict([onmt.Constants.PAD_WORD, onmt.Constants.UNK_WORD,
- onmt.Constants.BOS_WORD, onmt.Constants.EOS_WORD], lower=True)
+ onmt.Constants.BOS_WORD, onmt.Constants.EOS_WORD], lower=opt.lower)
 
  with open(filename) as f:
  for sent in f.readlines():