没有在ctypes消息框上打印消息和变量

Question

我正在使用以下代码无缝地计算我的工作时间。但是现在在安装Python 3之后，我无法获得ctypes消息框打印时间，而是只显示标题中的D和消息框中的D。

我是Python的新手，请帮我格式化这段代码，让我在Python 3.6中运行它

下面是代码

import time
import ctypes
def timer(hours): #Also i get indentation here when i see in PyCharm
seconds = hours * 3600
start = time.time()

elapsed = 0
while elapsed < seconds:
    # Do something once every minute.
    time.sleep(0.0010)
    elapsed = time.time() - start

elapsed = elapsed/3600
float(elapsed)
ctypes.windll.user32.MessageBoxA(0,"Done "  +'%.2f' %(elapsed) + " Hrs",  
"Done", 0)

timer(8.9) #I usually run this with for 8h 55m to alert me 5 minutes before 
9 hour