Tkinter - AttributeError: 'str' object has no attribute 'set'

Question

This is the code I have created and am trying to run:

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()

But I am receiving the following error:

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 __call__
    self.__var.set(self.__value)
AttributeError: 'str' object has no attribute 'set'

I tried messing with some of the variables and using different methods to get the menu to work, but nothing seemed to get rid of the error.

Any idea on how to fix the error?

Padraic Cunningham · Accepted Answer · 2015-08-05 22:08:51Z

7

Use a StringVar not a str

  def createWidgets(self, master=None):
        var = tk.StringVar()

A python str has no set method or attribute, a StringVar is specific to tkinter and what you are meant to be using.

edited Aug 5, 2015 at 22:08

answered Aug 5, 2015 at 21:49

Padraic Cunningham

181k30 gold badges264 silver badges327 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

David Worman Over a year ago

Thanks so much! I originally had it as a StringVar but it would not work. I got on today to try it and it worked perfectly!

Collectives™ on Stack Overflow

Tkinter - AttributeError: 'str' object has no attribute 'set'

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related