Becuz it is a jpython code, we can use it in Sikuli.
from time import strftime, gmtime
from java.awt import Toolkit
from java.awt import Robot
from java.awt import Rectangle
from javax.imageio import ImageIO
from java.io import File
tk = Toolkit.getDefaultToolkit()
ss = tk.getScreenSize()
rbt = Robot()
wait(2)
bimage = rbt.createScreenCapture(Rectangle(ss))
setTime = strftime("%Y_%m_%d_%H_%M_%S", time.localtime())
ImageIO.write(bimage, "png", File("C:\\screenshot_"+ setTime +".png"))