I'm getting this attribute error working with tkinter

Question

from tkinter import *
import tkinter.font

class App:

    def __init__(self, master):
        self.master = master
        self.frame = Frame(master)
        self.frame.grid()

        labell = Label(self.frame, text="min: ")
        labell.grid()

        self.min = Scale(self.frame, from_=1, to=10, orient=HORIZONTAL,
                     command=self.updateMax)
        self.min.grid(row=0, column=1, columnspan=2)

This is where the error supposedly is:

    def updateMax(self,value):
        self.max.config(from_=int(value)+1)
        self.max.config(to=int(value)+11)

    def compute(self):
        lower = self.min.get()
        upper = self.max.get()+1
        self.list.delete(0,END)
        for x in range(lower,upper):
            str = "{0:2d} {1:3d} {2:4d}".format(x,x*x,x*x*x)
            self.list.insert(END,str)

root = Tk()
app = App(root)
root.mainloop()

ERROR!!

AttributeError: 'App' object has no attribute 'max'

What am I doing wrong here? Please answer asap. Thanks.

The code you gave never defines a self.max. All I see is a self.min. Is this all of the code? — user2555451
– user2555451, Commented Nov 21, 2013 at 18:19
Where exactly have you defined self.max? I can't see it. (Thus, the error?!) — shad0w_wa1k3r
– shad0w_wa1k3r, Commented Nov 21, 2013 at 18:19
@iCodez and Ashish, this is all the code. I have to define max? I assumed that was what updateMax was doing? — user2965079
– user2965079, Commented Nov 21, 2013 at 18:58

user2555451 · Accepted Answer · 2013-11-21 19:04:53Z

2

If that is all of the code, then the problem is simple: you never defined self.max yet you try to use it here:

def updateMax(self,value):
    self.max.config(from_=int(value)+1)
    self.max.config(to=int(value)+11)

Perhaps you meant to use self.min, which you did define:

def updateMax(self,value):
    self.min.config(from_=int(value)+1)
    self.min.config(to=int(value)+11)

If not, then you need to define self.max before you use it.

answered Nov 21, 2013 at 19:04

user2555451

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