Port contrib to python3

velconia · velconia · commit c3e187896d6e · 2018-08-02T20:56:59.000+08:00
diff --git a/python/paddle/fluid/contrib/decoder/beam_search_decoder.py b/python/paddle/fluid/contrib/decoder/beam_search_decoder.py
@@ -22,6 +22,7 @@
 
 import contextlib
 import numpy as np
+import six
 
 from ... import layers
 from ...framework import Variable
