Python 2.7 类Tk没有属性'；框架'；

运行简单的Tkinter程序时会发生属性错误。我已经检查了教程和相关问题，但我仍然不知道如何修复它

import Tkinter as Tk
class Application(Tk.Frame):
def __init__(self, master=None):
    Tk.Frame.__init__(self, master)
    self.grid()
    self.createWidgets()

def createWidgets(self):
    self.quitButton = Tk.Button(self, text='Quit',
                                command=self.quit)
    self.quitButton.grid()

app = Application()
app.master.title('Sample application')
app.mainloop()

错误消息显示：

class Application(Tk.Frame):
AttributeError: class Tk has no attribute 'Frame'

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有人能帮我吗

您永远不会将tk窗口传递给应用程序

import Tkinter # careful with importing it as Tk because Tk is already a sub module of Tkinter 
class Application(Tkinter.Frame):
    def __init__(self, master=None):
        Tkinter.Frame.__init__(self, master)
        self.grid()
        self.createWidgets()

    def createWidgets(self):
        self.quitButton = Tkinter.Button(self, text='Quit',
                                command=self.quit)
        self.quitButton.grid()

window = Tkinter.Tk()
app = Application(master=window)
app.master.title('Sample application')
app.mainloop()

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改进您的缩进是否有名为Tkinter.py或类似文件？