from Xlib import display, X
from PIL import Image

# 580

W,H = 580,620
x,y = 0, 0

dsp = display.Display(':0')
try:
    root = dsp.screen().root
    raw = root.get_image(x, y, W,H, X.ZPixmap, 0xffffffff)
    image = Image.frombytes("RGB", (W-x, H-y), raw.data, "raw", "BGRX")
    image.save('image.png')
finally:
    dsp.close()