Hi , i'm a beginner technical for odoo , i was install custom addons and so for it just show new date field , i want to change Depreciation Date start from Date acquisition by click Compute button

you can check my explain pict in here : http://imageshack.com/a/img540/3630/vUsUfk.png

i was see python code from account.asset.py for my reference , but i get confused because the syntax was complex

you can check python code pict in here : http://imageshack.com/a/img905/5428/XJVZtH.png

Can you teach me to rebuild python code and make Depreciation Date start from Date acquisition ?

Thank you

*sorry i give linked image because i had trouble when upload image in here