Tkinter继承的类在Ubuntu上运行不正常

Question

我创建了一个直接从根窗口继承的简单类，它可以在Mac机器上完美地工作。然而，当我试图在我自己的基于Ubuntu的机器上运行它时，它崩溃了，出现了以下错误。是什么原因造成的？你知道吗

Traceback (most recent call last):
  File "/home/estilen/Dropbox/Python/email_viewer/dialog.py", line 15, in <module>
    Dialog('This is definitely working')
  File "/home/estilen/Dropbox/Python/email_viewer/dialog.py", line 7, in __init__
    tk.Tk.__init__(self, dialog_message)
  File "/usr/lib/python3.5/tkinter/__init__.py", line 1871, in __init__
    self.tk = _tkinter.create(screenName, baseName, className, interactive, wantobjects, useTk, sync, use)
_tkinter.TclError: couldn't connect to display "This is definitely working"

代码：

import tkinter as tk


class Dialog(tk.Tk):

    def __init__(self, dialog_message):
        tk.Tk.__init__(self, dialog_message)
        self.geometry('400x100')
        label = tk.Label(self, text=dialog_message)
        label.pack(anchor='center', side='top', pady=10)
        self.mainloop()


if __name__ == '__main__':
    Dialog('This is definitely working')

Answer 1

tk.Tk.__init__(self, dialog_message)

我觉得这不对劲。Tk构造函数的第一个位置参数是^{}。如果您不想在名为“This is finally working”的显示器上显示窗口，则不要提供该参数。你知道吗

tk.Tk.__init__(self)

。。。或者，更习惯地说

super().__init__()