Drop down list dependent from another drop down tkinter

You can use Combobox to make dependent dropdown list

import tkinterfrom tkinter import ttkroot = tkinter.Tk()''' widgets are added here '''brands = ["Bugatti","VW","Opel","Porsche"]models = [["Veyron","Chiron"],          ["Golf","Passat","Polo","Caddy"],          ["Insignia","Corsa","Astra"],          ["Taycan","Cayenne","911"]]car_brand = ttk.Combobox(root, width=37, value=(brands))car_brand.grid(row=3, column=1, columnspan=2, padx=10, pady=2, sticky='w')def callback(eventObject):    abc = eventObject.widget.get()    car = car_brand.get()    index=brands.index(car)    car_model.config(values=models[index])car_model = ttk.Combobox(root, width=37)car_model.grid(row=4, column=1, columnspan=2, padx=10, pady=2, sticky='w')car_model.bind('<Button-1>', callback)root.mainloop()

import tkinter as tkbrands = ["Bugatti","VW","Opel","Porsche"]models = [["Veyron","Chiron"],          ["Golf","Passat","Polo","Caddy"],          ["Insignia","Corsa","Astra"],          ["Taycan","Cayenne","911"]]root = tk.Tk()canvas = tk.Canvas(root, height=500, width= 500, bg="white")canvas.pack()tkvar = tk.StringVar(root)tkvar.set('Choose')tkvar2 = tk.StringVar(root)tkvar2.set('Model')popupMenu1 = tk.OptionMenu(canvas, tkvar, *brands)popupMenu1.pack()popupMenu2 = tk.OptionMenu(canvas, tkvar2, [])popupMenu2.pack()def change_dropdown(*args):    print("Chosen brand " + tkvar.get())    for i in range(len(brands)):        if tkvar.get() == brands[i]:            popupMenu2["menu"].delete(0, "end")            for item in models[i]:                   popupMenu2['menu'].add_command(label=item, command=tk._setit(tkvar2, item))tkvar.trace('w', change_dropdown)root.mainloop()