finish tasks below: 1. Add all the four newspaper's essays from essaysDB. 2. Add all the logging part of four classes and main.py files. 3. Add comments to all functions of the whole classes.
finish tasks below:
1. Add all the four newspaper's essays from essaysDB.
2. Add all the logging part of four classes and main.py files.
3. Add comments to all functions of the whole classes.

ysh329/chinese-word-segmentation