python问题,NameError: name 'messagebox' is not defined 怎么回事啊?
from tkinter import *
root = Tk()
messagebox.showwarning("open","dddddd")
root.mainloop()
Traceback (most recent call last):
File "C:\Users\roln\workspace\pylearn\src\mtest.py", line 3, in <module>
messagebox.showwarning("open","dddddd")
NameError: name 'messagebox' is not defined
python 3.0
这就么一段简单的程序,在python自带的IDLE中可以运行,在cmd下用python test.py运行时就提示上面的错误。请问怎么处理?