内存泄漏/ Python Windows 7屏幕截图

Question

我已经在双显示器系统（Windows7）上尝试以下Python代码来重复保存屏幕截图。它生成33张14.6MB（总共482MB）的照片，然后崩溃。使用Process Explorer进行检查，我可以看到已用内存量增加到约500MB。

我的问题是如何阻止内存泄漏？

import win32gui, win32ui, win32con, win32api

import time

import os

def my_capture(file_name):

    hwin = win32gui.GetDesktopWindow()

    width = win32api.GetSystemMetrics(win32con.SM_CXVIRTUALSCREEN)

    height = win32api.GetSystemMetrics(win32con.SM_CYVIRTUALSCREEN)

    left = win32api.GetSystemMetrics(win32con.SM_XVIRTUALSCREEN)

    top = win32api.GetSystemMetrics(win32con.SM_YVIRTUALSCREEN)

    hwindc = win32gui.GetWindowDC(hwin)

    srcdc = win32ui.CreateDCFromHandle(hwindc)

    memdc = srcdc.CreateCompatibleDC()

    bmp = win32ui.CreateBitmap()    

    bmp.CreateCompatibleBitmap(srcdc, width, height)

    memdc.SelectObject(bmp)

    memdc.BitBlt((0, 0), (width, height), srcdc, (left, top), win32con.SRCCOPY)

    bmp.SaveBitmapFile(memdc, file_name) # 'screenshot.bmp'

def captureAndSave(i):

    if i < 10:

        tmpStr = "00000" + str(i)

    elif i < 100:

        tmpStr = "0000" + str(i)

    elif i < 1000:

        tmpStr = "000" + str(i)

    elif i < 10000:

        tmpStr = "00" + str(i)

    elif i < 100000:

        tmpStr = "0" + str(i)

    else:

        tmpStr = str(i)

    my_capture(tmpStr + '.bmp')

def myMainLoop():

    i = 0

    while 1:

        i = i + 1

        captureAndSave(i)

        time.sleep(0.2)

#-----------------------------------------------------------------------------

if __name__ == '__main__':

    try:

        myMainLoop()        # capure all monitor windows

    except KeyboardInterrupt:

        pass 

Answer 1

您将需要清理位图和DC，在位图保存后添加类似的内容。win32gui.DeleteObject(bmp.GetHandle())memdc.DeleteDC()srcdc.DeleteDC()win32gui.ReleaseDC(hwin, hwindc)&nbsp;