import Tkinter, Tkconstants, tkFileDialog
class TkFileDialogExample(Tkinter.Frame):
    def __init__(self, root):
        Tkinter.Frame.__init__(self, root)
      # options for buttons
        button_opt = {'fill': Tkconstants.BOTH, 'padx': 5, 'pady': 5}
       # define buttons
        Tkinter.Button(self, text='askopenfile', command=self.askopenfile).pack(**button_opt)
        Tkinter.Button(self, text='askopenfilename', command=self.askopenfilename).pack(**button_opt)
        Tkinter.Button(self, text='asksaveasfile', command=self.asksaveasfile).pack(**button_opt)
        Tkinter.Button(self, text='asksaveasfilename', command=self.asksaveasfilename).pack(**button_opt)
        Tkinter.Button(self, text='askdirectory', command=self.askdirectory).pack(**button_opt)
   
      # define options for opening or saving a file
        self.file_opt = options = {}
        options['defaultextension'] = '.txt'
        options['filetypes'] = [('all files', '.*'), ('text files', '.txt')]
        options['initialdir'] = 'C:\\'
        options['initialfile'] = 'myfile.txt'
        options['parent'] = root
        options['title'] = 'This is a title'
   
       # This is only available on the Macintosh, and only when Navigation Services are installed.
       #options['message'] = 'message'
   
       # if you use the multiple file version of the module functions this option is set automatically.
       #options['multiple'] = 1
   
       # defining options for opening a directory
        self.dir_opt = options = {}
        options['initialdir'] = 'C:\\'
        options['mustexist'] = False
        options['parent'] = root
        options['title'] = 'This is a title'
   
    def askopenfile(self):
        return tkFileDialog.askopenfile(mode='r', **self.file_opt)
   
    def askopenfilename(self):
   
       """Returns an opened file in read mode.
       This time the dialog just returns a filename and the file is opened by your own code.
       """
   
       # get filename
       filename = tkFileDialog.askopenfilename(**self.file_opt)
   
       # open file on your own
       if filename:
         return open(filename, 'r')
   
    def asksaveasfile(self):
   
       """Returns an opened file in write mode."""
   
       return tkFileDialog.asksaveasfile(mode='w', **self.file_opt)
   
    def asksaveasfilename(self):
      """Returns an opened file in write mode.
      This time the dialog just returns a filename and the file is opened by your own code.
      """
      # get filename
      filename = tkFileDialog.asksaveasfilename(**self.file_opt)
   
       # open file on your own
      if filename:
          return open(filename, 'w')
   
    def askdirectory(self):
      """Returns a selected directoryname."""
      return tkFileDialog.askdirectory(**self.dir_opt)
   
if __name__=='__main__':
    root = Tkinter.Tk()
    TkFileDialogExample(root).pack()
    root.mainloop()