* optimize demo and cv reader

* remove needless import
Co-authored-by: Nwuzewu <wuzewu@baidu.com>

* finish coding predict

* optimize predict pr

* optimize _postprocessing

* optim namedtuple

* reconsitution reader and dataset

* Add module v2

* fix path bug

* fix environment variable autodl setting

* add task hook

* colorlog

* optimize __repr__

* fix unpad

* restore the removed code

* modify cv reader

* optimize nltk

* add file checking when execute hub run