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import win32clipboard as clip
import win32con
from io import BytesIO
from PIL import ImageGrab


screenshot = ImageGrab.grab()


output = BytesIO()
screenshot.convert('RGB').save(output, 'BMP')
data = output.getvalue()[14:]
output.close()

clip.OpenClipboard()
clip.EmptyClipboard()
clip.SetClipboardData(win32con.CF_DIB, data)
clip.CloseClipboard()