pynlpir 报错 Cannot Save user dictionary 原因与解决方法

在使用pynlpir和用户自定义词典进行分词时，如果报出如下错误：

    [2017-12-09 18:05:51] Cannot Save user dictionary  
    Cannot write log file /usr/local/lib/python2.7/dist-packages/pynlpir/Data/20171209.err!
    [2017-12-09 18:05:51] /usr/local/lib/python2.7/dist-packages/pynlpir/Data/FieldDict.pos
    Cannot write log file /usr/local/lib/python2.7/dist-packages/pynlpir/Data/20171209.err!
    ...

一般是因为权限不够高，需要到pynlpir的相应目录下对相关文件进行提权限操作，如：

    d0main@d0main-dell:/usr/local/lib/python2.7/dist-packages/pynlpir/Data$ sudo chmod 777 FieldDict.pdat 
    d0main@d0main-dell:/usr/local/lib/python2.7/dist-packages/pynlpir/Data$ sudo chmod 777 UserDefinedDict.lst 
    d0main@d0main-dell:/usr/local/lib/python2.7/dist-packages/pynlpir/Data$ sudo chmod 777 FieldDict.pos