How to find the correct information for creating shortcut ? i really want to create shortcut by myself and im struling to find the correct code for what i want to create 

this kind of code 

"screen.trigger_shadeless"

how do you find such information with anything inside of blender to create a shortcut ? 

thanks
right click ony (almost) any option and click edit source.

the name of the operator is what you need. (n.b. I am no python expert so I may not have the right terminology or way of doing it). 



but it takes a bit of experience knowing what to search. depending on what are your needs, you can always right click and assign them on the fly. personally I never had a reason not do so.