CODEWITHSUNDEEP
python-3.xtkinter
James
James

Reputation: 327

python 3 Tkinter Checkbutton value

Hey guys i´m new to tkinter and i´m testing stuff out. In this code i´m getting the error "'Graphicaluserinterface' object has no attribute 'var'" which i don´t understand, since i have it in my init method. My Code:

import tkinter as tk

class Graphicaluserinterface(tk.Frame):

    def __init__(self,master=None):
        super().__init__(master)
        self.grid()
        self.create_widgets()
        self.startbuttonfunktion()
        self.checkbutton1
        self.var=IntVar()

    def create_widgets(self):
        self.programmstart = tk.Button(self, text = "Programmstart")
        self.programmstart.grid(row=0,column=1)
        self.programmstart["command"]=self.startbuttonfunktion

        self.programmschliessen = tk.Button(self, text ="Exit Programm",command=root.destroy)
        self.programmschliessen.grid(row=1,column=2)

        self.checkbutton1 = tk.Checkbutton(self, text = "Sensoren1",variable=self.var,onvalue=1,offvalue=0)
        self.checkbutton1.grid(row=1,column=0)

    def startbuttonfunktion(self):
        if self.var.get()==1:
            print("Der Checkbutton wurde geklickt")
        else:
            print("Der Checkbutton wurde NICHT geklickt")



root = tk.Tk()        
app = Graphicaluserinterface(master=root)
app.master.title("TestProgramm")
app.master.maxsize(1200,600)
app.mainloop()

Upvotes: 1

Views: 348

Answers (1)

Mike - SMT
Mike - SMT

Reputation: 15226

The problem is order of operation. You are only creating the self.var IntVar after you run your other methods. So when those methods try to access self.var they cannot because it has not been created yet.

Move self.var=IntVar() Above self.create_widgets().

That said you need to also change IntVar() to tk.IntVar() as you have shown you are doing import tkinter as tk and thus all tkinter widgets will need a tk. prefix.

Make those 2 changes and you code will work fine.

Upvotes: 2

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