how Set focus next object if maxlength of last object is 3?

Question

if qlineedit.maxlength==3: nextqlineedit.setfocus()

if we insert 3digits numbers in a qlineedit without press any key, the next object get focus
how can write that?

Answer 1

If it's a loop you refer to, check the condition and if it's true, save the next index by incrementing the counter by 1 then break.

Answer 2

can you make an example please