小编Dav*_*man的帖子

这是我创建的代码,我正在尝试运行:

import tkinter as tk


def ok(val):
    print("Value is: ", val)

def say_hi(self):
    print("hi there, everyone!")

class Application(tk.Frame):

    def __init__(self, master=None):
        tk.Frame.__init__(self, master)
        master.title("Hi There")
        master.geometry("400x400")
        self.createWidgets(master)

    def createWidgets(self, master=None):
        var = str()

        self.select = tk.OptionMenu(master, var, "one", "two","three", command=ok).grid(column=1, row=1)

        self.QUIT = tk.Button(master, text="QUIT", fg="red", command=root.destroy).grid(column=2, row=1)
        print ("HI")

root = tk.Tk()
app = Application(master=root)
app.mainloop()

但是我收到以下错误:

Exception in Tkinter callback
Traceback (most recent call last):
  File "C:\Python34\lib\tkinter\__init__.py", line 1533, in __call__
    return self.func(*args)
  File "C:\Python34\lib\tkinter\__init__.py", line 3308, in …