Python Tkinter Run Checkbuttons -

i want write python script, have checkbuttons , button running active checkbuttons. if checkbutton active , click on "run" def run_app should check checkbuttons active. if run code, terminal says, global name "is_checked" not defined.

from tkinter import * import os import sys import os.path import subprocess  exe = (path of exe)   call = exe  class app:   def __init__(self, master):     self.is_checked = intvar()     frame = frame(master)     frame.pack()     self.test = checkbutton(frame,                       text="verzeichnisse",                      )     self.test.pack(side=left)      self.slogan = checkbutton(frame,                      text="visual studio",                      onvalue=1,                       offvalue=0,                       variable=self.is_checked                       )     self.slogan.pack(side=left)      self.button = button(frame,                       text="run", fg="red",                      command=self.run_app)     self.button.pack(side=left)   def open_vb(self):     subprocess.call(call, shell=true)   def run_app(self):     if self.is_checked.get():         command=self.open_vb    root = tk() app = app(root) root.mainloop() 

is_checked created locally means there no is_checked variable outside of __init__.

if want use variable outside of created, need either make global or bind class. since have class structure, better use latter one.

you need change is_checked self.is_checked everywhere make variable part of class.