Tkinter Python classes and variables - python-3.x

Question

I tried to create a multi-frame python application. However, when I try to retrieve the information from the radiobutton, python throws me an error saying the variable "movie " is not defined. Can someone explaining me what am I missing?
To my understanding, I guess the problem is that the variable is declared inside the class. I tried to make the variable global, but it did not help in solving the problem.
import tkinter as tk
from tkinter import *
from tkinter import ttk
LARGE_FONT=("Verdana", 12)
class Movies(tk.Tk):
def __init__(self, *args, **kwargs):
tk.Tk.__init__(self,*args, **kwargs)
tk.Tk.wm_title(self, "Movie I like")
tk.Tk.wm_geometry(self, "500x500")
container=tk.Frame(self)
container.pack(side="top", fill="both", expand="True")
self.frames={}
for F in (StartPage, PageOne):
frame= F(container, self)
self.frames[F]= frame
frame.grid(row=0, column=0, sticky="nsew")
self.show_frame(StartPage)
def show_frame(self, cont):
frame=self.frames[cont]
frame.tkraise()
class StartPage(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
s = ttk.Style()
s.configure('my.TButton', font=('Verdana', 8))
label=tk.Label(self, text="Home Page", font=LARGE_FONT)
label.pack(pady=10, padx=30)
button_load=ttk.Button(self, text="Kind of Movie ", width=30, style='my.TButton',
command= lambda: controller.show_frame(PageOne))
button_load.pack(padx=30)
class PageOne(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
movie= tk.StringVar()
movie.set("1")
mybutton=ttk.Radiobutton(self, text='Drama', variable=movie, value="Drama").grid(column=1,row=1, sticky=W, padx=10)
mybutton1=ttk.Radiobutton(self, text='Comedy', variable=movie, value="Comedy").grid(column=2,row=1, sticky=W, padx=10)
button_submit=ttk.Button(self, text="Submit", width=15,
command=save_info).grid(column=3, row= 10, padx=5)
def save_info():
movie_info=movie.get()
print("you like " + movie_info)
app=Movies()
app.mainloop()