literal depression

from Tkinter import *
import re
import json

root = Tk()

class GUI:
    def __init__(self, master):
        self.master = master
        master.title("Stage 0")

        self.lightlist = [IntVar(),IntVar(),IntVar(),IntVar(),IntVar(),IntVar(),IntVar(),IntVar(),IntVar()]
        self.listfull  = [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
        self.frames = []
        self.framerate = 30

        self.advancebtntext = StringVar()
        self.advancebtntext.set("Next Stage")

        self.framerateboxval = StringVar()

        self.framerateset = 0

        self.stage = 0

        self.c0           = Checkbutton(master, text="", variable=self.lightlist[0]).grid(row=0, column=0)
        self.c1           = Checkbutton(master, text="", variable=self.lightlist[1]).grid(row=0, column=1)
        self.c2           = Checkbutton(master, text="", variable=self.lightlist[2]).grid(row=0, column=2)
        self.c3           = Checkbutton(master, text="", variable=self.lightlist[3]).grid(row=1, column=0)
        self.c4           = Checkbutton(master, text="", variable=self.lightlist[4]).grid(row=1, column=1)
        self.c5           = Checkbutton(master, text="", variable=self.lightlist[5]).grid(row=1, column=2)
        self.c6           = Checkbutton(master, text="", variable=self.lightlist[6]).grid(row=2, column=0)
        self.c7           = Checkbutton(master, text="", variable=self.lightlist[7]).grid(row=2, column=1)
        self.c8           = Checkbutton(master, text="", variable=self.lightlist[8]).grid(row=2, column=2)
        self.advancebtn   = Button(master, textvariable=self.advancebtntext, command=self.advance)
        self.advancebtn.grid(row=4, column=1)
        self.frameratebox = Entry(master, textvariable=self.framerateboxval, validate='key', vcmd=(root.register(self.validateText), '%P'))

    def validateText(self, text):
        if re.findall('[^\d.]', text):
            self.advancebtn.config(state=DISABLED)
            return False
        elif text == '':
            self.advancebtn.config(state=DISABLED)
            return True
        self.advancebtn.config(state=NORMAL)
        return True

    def advance(self):
        for i in range(0, len(self.lightlist)):
            if self.stage   == 0:
                self.listfull[i]      = self.lightlist[i].get()
            elif self.stage == 1:
                self.listfull[i + 9]  = self.lightlist[i].get()
            elif self.stage == 2:
                self.listfull[i + 18] = self.lightlist[i].get()

            self.lightlist[i].set(0)

        if self.stage   == 0:
            self.master.title("Stage 1")
        elif self.stage == 1:
            if not self.framerateset:
                self.frameratebox.grid(row=5, column=1)
                self.frameratebox.focus_set()
                self.advancebtn.config(state=DISABLED)
            self.master.title("Stage 2")
            self.advancebtntext.set("Next Frame")
        elif self.stage == 2:
            self.frameratebox.grid_forget()
            self.framerateset = 1
            self.master.title("Stage 0")
            self.frames += [self.listfull]
            self.stage = 0
            self.advancebtntext.set("Next Stage")
            return self.newFrame(self)

        self.stage += 1

    def newFrame(self, arg1):
        try:
            with open('animation.json', 'r') as file:
                data = json.read(file)
                data.frames += self.frames
            with open('animation.json', 'w') as file:
                json.dump(data, file)
        except:
            with open('animation.json', 'w') as file:
                json.dump({"frames":self.frames,"framerate":self.framerate}, file)

my_gui = GUI(root)
root.mainloop()