Python3 tkinter radiobutton problem

[deanhystad]

You need an IntVar(), not a StringVar(). You can use either IntVar() or StringVar(), but the variable type must match the value type.

This code uses a StringVar() and sets the RadioButton value to the food name. Since the button values are food names it makes more sens for food to be a dictionary with the name as the key.

root.geometry("1500x1300")

food = {
    "Rice": 0.99,
    "Spaghetti": 0.95,
    "Ice cream": 3.44,
    "Pizza": 7.50,
    "Cheese": 2.10, 
    "Cheddar": 0.45, 
    "Cherry": 0.88, 
    "Banana": 0.40, 
    "Apple": 0.67, 
    "Meat": 7.28, 
    "Fish": 9.72, 
    "Orange": 0.62, 
    "Orange juice": 2.10, 
    "Chocolate": 0.99, 
    "Bread": 0.55}

frame = tk.LabelFrame(root, relief=tk.SUNKEN, bd=1)
frame.grid(row=0 ,column=0, sticky=tk.W)

food_var = tk.StringVar()
food_var.set(list(food)[0])
for r, name in enumerate(food):
    tk.Radiobutton(frame , text=name, variable=food_var, value=name, padx=10, pady=5) \
        .grid(row=r+1, column=0 , sticky=tk.W)
    label_price = tk.LabelFrame(root, relief=tk.SUNKEN, bd=1, text="Price")
    label_price.grid(row=r+1, column=1, sticky=tk.W)

def select_food(food_name):
    tk.Label(grocery_list, text=food_name).pack(side=tk.TOP)

button = tk.Button(root, text="Basket", command=lambda: select_food(food_var.get()))
button.grid(row=0, column=3)
grocery_list = tk.Frame(root)
grocery_list.grid(row=0, column=4)

root.mainloop()