def __call__(self, sample):
<EOL>return [tok for tok in self._tokenizer.cut(sample) if tok != '<STR_LIT:U+0020>' and tok != '<STR_LIT>']<EOL>
Parameters
----------
sample: str
    The Chinese sentence to tokenize. Better not to input sentence in other languages
    since this class is mainly used for Chinese Word Segmentation.

Returns
-------
ret : list of strs
    List of tokens