I used some participle pyhanlp for operation, the custom dictionary add some new words and part of speech, and configured the path problem, but in the treatment of document, mathematical symbols or letters not good points out, such as "{| | a + b}" with "{, |,}" the symbols I have been in the custom dictionary defines the part of speech and word frequency (the "{" etc.) is defined as a mathematical symbols, but still can't completely separate, actual effect" |}/w "want effect" |/mathematical symbol ""}/mathematical symbols" one symbol points out, see a lot of information is not very clear, strives for the leaders to solve