Fastest way to take a screenshot with python on windows

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You could use win32 APIs directly .

  1. First give the focus to the App that you want to take screenshot of.
    link text

  2. Win32 API can help with the screenshot:

import win32gui
import win32ui
import win32con

w = 1920 # set this
h = 1080 # set this
bmpfilenamename = "out.bmp" #set this

hwnd = win32gui.FindWindow(None, windowname)
wDC = win32gui.GetWindowDC(hwnd)
dcObj=win32ui.CreateDCFromHandle(wDC)
cDC=dcObj.CreateCompatibleDC()
dataBitMap = win32ui.CreateBitmap()
dataBitMap.CreateCompatibleBitmap(dcObj, w, h)
cDC.SelectObject(dataBitMap)
cDC.BitBlt((0,0),(w, h) , dcObj, (0,0), win32con.SRCCOPY)
dataBitMap.SaveBitmapFile(cDC, bmpfilenamename)

# Free Resources
dcObj.DeleteDC()
cDC.DeleteDC()
win32gui.ReleaseDC(hwnd, wDC)
win32gui.DeleteObject(dataBitMap.GetHandle())

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