use

lhw@lhw-Ideapad-S110:~/code/基于主题的文本情感分析$ python3 sentimental.py 
/usr/local/lib/python3.5/dist-packages/sklearn/cross_validation.py:41: DeprecationWarning: This module was deprecated in version 0.18 in favor of the model_selection module into which all the refactored classes and functions are moved. Also note that the interface of the new CV iterators are different from that of this module. This module will be removed in 0.20.
  "This module will be removed in 0.20.", DeprecationWarning)
/usr/local/lib/python3.5/dist-packages/sklearn/grid_search.py:42: DeprecationWarning: This module was deprecated in version 0.18 in favor of the model_selection module into which all the refactored classes and functions are moved. This module will be removed in 0.20.
  DeprecationWarning)
Building prefix dict from the default dictionary ...
Dumping model to file cache /tmp/jieba.cache
Loading model cost 13.686 seconds.
Prefix dict has been built succesfully.
ornginal:
0.953795121867
             precision    recall  f1-score   support

       null      0.968     0.981     0.975     45968
          n      0.934     0.894     0.914      1770
          t      0.783     0.616     0.690      3017
          m      0.971     0.961     0.966       283
          p      0.907     0.938     0.922      3124

avg / total      0.953     0.955     0.954     54162