It seems in your code, the argument 'variable' in your Checkbutton is not bounded, furthermore to get the value from IntVar or StringVar you would use (IntVar.get(), StringVar().get()), you could use the next code as example to use Checkbutton widget.
'''
CheckBox Test
References:
http://effbot.org/tkinterbook/checkbutton.htm
'''
from tkinter import *
class App:
def __init__(self, master):
self.var = IntVar() #This is the variable bounded to checkbutton to
#get the checkbutton state value
#
frame = Frame(master)
frame.pack()
self.checkbutton = Checkbutton(frame, text="Hello Checkbutton",
command=self.say_hello, variable=self.var)
self.checkbutton.pack(side=LEFT)
#
self.button = Button(frame, text="QUIT", fg="red", command=frame.quit)
self.button.pack(side=LEFT)
def say_hello(self):
'''
Function Bounded to Checkbutton in command parameter, every click
either check or un-check print the current state of the checkbutton
'''
print("State Changed:", self.var.get())
if __name__ == '__main__':
root = Tk()
app = App(root)
#
root.mainloop()
root.destroy() # Quit the App when you click "Quit"
Every click on the check button, you will see printed in the console the value of the current state for the checkbutton. You can check the next reference to get an general overview tkinter widgets: http://effbot.org/tkinterbook/checkbutton.htm
I hope this snippet helps you.
Very Best Regards.
