from PIL import Image, ImageGrab
from win32api import GetSystemMetrics

w = GetSystemMetrics(0)
h = GetSystemMetrics(1)

image = Image.new('RGB', (w, h))
screen = ImageGrab.grab().load()

for w in range(w):
    for h in range(h):
        image.putpixel((w, h), screen[w, h])

image.save('1.png', 'png')