I have a question about python's image processing module (Pillow).

I executed the following code to take a screenshot with Pillow.However, both the x-axis and y-axis of the computer screen are captured in half.1000px by 1000px will capture only 500px by the top left of the screen as the starting position.I would appreciate it if you could let me know the improvements.
(The result was the same when you specified pixels.It's expected to recognize the entire screen up to half the width.)

 from PIL import ImageGrab
defmain():
    extraction=ImageGrab.grab()
    extraction.show()
    if__name__=="__main__":
main()