add utility functions package

Author: supercoderhawk

python/dnlp/utils/__init__.py

@@ -0,0 +1 @@
+#-*- coding: UTF-8 -*-

python/dnlp/utils/constant.py

@@ -0,0 +1,22 @@
+# -*- coding: UTF-8 -*-
+
+# 字典
+BATCH_PAD = 'BATCH_PAD'
+BATCH_PAD_VAL = 0
+UNK = 'UNK'
+UNK_VAL = 1
+STRT = 'STRT'
+STRT_VAL = 2
+END = 'END'
+END_VAL = 3
+
+# 标注标签
+TAG_PAD = 'P'
+TAG_BEGIN = 'B'
+TAG_INSIDE = 'I'
+TAG_END = 'E'
+TAG_SINGLE = 'S'
+TAG_OTHER = 'O'
+
+# 映射表
+CWS_TAGS = (TAG_BEGIN, TAG_INSIDE, TAG_END, TAG_SINGLE,TAG_PAD)