* add choice and mask of units to checkpoint
* update
* fix bug
* remove device operation
* fix bug
* fix circle ci error
* fix error in numpy for circle ci
* fix bug in requirements
* restore
* add a note
* a new solution
* save mutable_channel.mask as float for dist training
* refine
* mv meta file test
Co-authored-by: liukai <your_email@abc.example>
Co-authored-by: jacky <jacky@xx.com>
LKJacky