Python: Frage zu Tkinter Fenstergröße

[Snafu]

Probiers mal so:

  
from Tkinter import *  
from random import randint  
  
class Application(Frame):  
  
    ...  
  
    def createWidgets(self):  
        self.Text = Label(self,text=u"Bla").grid(row=0, column=1, columnspan=6)  
  
        self.Anzahl = Spinbox(self, from_=1, to=25)  
        self.Anzahl.grid(row=1, column=1, columnspan=6)  
  
        self.Quit = Button(self)  
        self.Quit["text"] = "Abbrechen"  
        self.Quit["fg"]   = "red"  
        self.Quit["command"] =  self.quit  
        self.Quit.grid(row=2, column=1, columnspan=3)  
  
        self.Erzeugen = Button(self)  
        self.Erzeugen["text"] = "Erzeugen",  
        self.Erzeugen["command"] = self.erzeugen  
        self.Erzeugen.grid(row=2, column=4, columnspan=3)  
  
    def __init__(self, master):  
        Frame.__init__(self, master)  
        self.master.geometry("400x250")  
        self.pack()  
        self.createWidgets()  
  
root = Tk()  
app = Application(root)  
root.mainloop()