如何在python中釋放內存wx.MemoryDC

Question

我無法在IDE中使用兩次腳本，我猜這是因爲內存未被釋放。我試圖做一些事情，但我真的不知道該如何釋放它。

import wx 
import win32gui 
from ctypes import windll 

hwnd = win32gui.FindWindow(None, 'Steam') 

# Window_FromHWND appears in wxPython 2.6.2.1+ 
def getScreenshot(): 
    window = wx.Window_FromHWND(None, hwnd) 

    src_dc = wx.WindowDC(window) 
    width, height = window.GetSize() 

    mem_dc = wx.MemoryDC() 
    bitmap = wx.EmptyBitmap(width, height) 
    mem_dc.SelectObject(bitmap) 

    windll.user32.PrintWindow(hwnd, mem_dc.GetHDC() , 0) 

    mem_dc.SelectObject(wx.NullBitmap) 

    mem_dc.Clear() 
    src_dc.Clear() 
    window.Destroy() 
    mem_dc.Destroy() 
    src_dc.Destroy() 

    return bitmap.ConvertToImage() 

app = wx.App(redirect=False) 

image = getScreenshot() 
filename = "testsnap.png" 
image.SaveFile(filename, wx.BITMAP_TYPE_PNG) 
image.Destroy() 

app.MainLoop() 

Answer 1

你並不需要調用app.MainLoop()可言，因爲你的程序應該是你救了你的形象，儘快退出。