i really unable to understand Decorators Concept .......Can anyone help me out with this ???

Answer 1

maybe this can help:

http://simeonfranklin.com/blog/2012/jul/1/JUMP_LINK__&&__python__&&__JUMP_LINK-decorators-in-12-steps/

Answer 2

Here is an example of what a decorator may be useful for:
https://code.sololearn.com/cD09ijlIS6Ev/?ref=app