的Python 3.4更改桌面背景圖片不能正常工作

Question

我試着SO和谷歌的每個例子，但他們沒有工作。我不知道爲什麼，劇本完成沒有任何錯誤。但背景圖像不會改變。我把這個圖像的絕對路徑，我試過jpg,png格式，基本上我嘗試了一切，但所有的例子完成沒有任何錯誤，但背景圖像並沒有改變。有沒有一個工作的例子呢？ Windows的7的Python 3.4

一些例子沒有工作;

import ctypes 
SPI_SETDESKWALLPAPER = 20 
ctypes.windll.user32.SystemParametersInfoA(SPI_SETDESKWALLPAPER, 0, "myimage.jpg" , 0) 
######################################## 

#This example can't find images, but I put absolute path to it. Don't know what's the problem 
import struct 
import ctypes 


SPI_SETDESKWALLPAPER = 20 
WALLPAPER_PATH = 'C:\\your_file_name.jpg' 


def is_64_windows(): 
    """Find out how many bits is OS. """ 
    return struct.calcsize('P') * 8 == 64 


def get_sys_parameters_info(): 
    """Based on if this is 32bit or 64bit returns correct version of SystemParametersInfo function. """ 
    return ctypes.windll.user32.SystemParametersInfoW if is_64_windows() \ 
     else ctypes.windll.user32.SystemParametersInfoA 


def change_wallpaper(): 
    sys_parameters_info = get_sys_parameters_info() 
    r = sys_parameters_info(SPI_SETDESKWALLPAPER, 0, WALLPAPER_PATH, 3) 

    # When the SPI_SETDESKWALLPAPER flag is used, 
    # SystemParametersInfo returns TRUE 
    # unless there is an error (like when the specified file doesn't exist). 
    if not r: 
     print(ctypes.WinError()) 


change_wallpaper() 

Answer 1

嘗試使用下面的代碼：

import struct 
import ctypes 
import os 

def is_64_windows(): 
    """Find out how many bits is OS. """ 
    return 'PROGRAMFILES(X86)' in os.environ 

def get_sys_parameters_info(): 
    """Based on if this is 32bit or 64bit returns correct version of SystemParametersInfo function. """ 
    return ctypes.windll.user32.SystemParametersInfoW if is_64_windows() \ 
     else ctypes.windll.user32.SystemParametersInfoA 

def change_wallpaper(): 
    sys_parameters_info = get_sys_parameters_info() 
    r = sys_parameters_info(SPI_SETDESKWALLPAPER, 0, WALLPAPER_PATH, 3) 
    if not r:   # When the SPI_SETDESKWALLPAPER flag is used, SystemParametersInfo returns TRUE unless there is an error (like when the specified file doesn't exist). 
     print(ctypes.WinError()) 

SPI_SETDESKWALLPAPER = 20 
WALLPAPER_PATH = 'C:\\your_file_name.jpg' 
change_wallpaper() 

我覺得你的問題是，你有64個窗戶，但32 Python中，那麼你的is_64_windows()函數返回False但它實際上是True，'PROGRAMFILES(X86)' in os.environ應該工作。