tkinter checkbutton if checked

[MC2020]

Hi - I am learning python and need help with this code. I have researched online, but haven't been able to find an answer for what I'm looking for.

My code is below. The 'open' function is what I need help with. I am looking to add the fooditem selected to the newwindow if the checkbox is checked. My code is below but isn't working. Can someone help point me in the right direction?

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fooditems = ['pizza','breadsticks','wings','CocaCola','brownie'] fooditems2 = [] price = ['15', '5', '10', '3', '2'] quantity = ['1','2','3','4']   import tkinter as tk from tkinter import * from tkinter import ttk   menu = Tk() menu.geometry('500x300')   combobox = ttk.Combobox(menu, values=quantity)   def Open():     New_Window = Tk()     New_Window.geometry('500x300')     calculateButton = tk.Button(New_Window, text = 'calculate')     calculateButton.place(x=250,y=250)     for x in range(len(fooditems)):         if Checkbutton.get(x) == 1:             fooditems2.append[x]     fooditems2.grid(column=0, row=x)     combobox.grid(column=15, row=x)     New_Window.mainloop()     for x in range(len(fooditems)):     a = Checkbutton(menu, text="", variable=fooditems[x], onvalue = 1, offvalue = 0)     b = Label(menu, text=fooditems[x])     a.grid(column=0, row=x)     b.grid(column=5, row=x)               confirmButton = tk.Button(menu, text = 'Confirm', command=Open) confirmButton.place(x=250,y=250)   menu.mainloop()

[woooee]

Don't use 2 instances of Tk() as the results are unpredictable. Use a Toplevel instead.

My code is below but isn't working

What does this mean?

[joe_momma]

one major issue with your code is it's not a class. here's a checkbox

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import tkinter as tk       class MainFrame(tk.Frame):        def __init__(self, *args, **kwargs):         super().__init__(*args, **kwargs)         self.vars=[]         self.checkbuttons = {'pizza': tk.IntVar(),                              'salad': tk.IntVar(),                              'coffee': tk.IntVar()}                    for key, value in self.checkbuttons.items():             ctrl = tk.Checkbutton(self, text=key, variable=value)             ctrl.pack()             self.vars.append(value)                    self.button = tk.Button(self, text='Checkbutton values',                                 command=self.on_button)                   self.button.pack(pady=5,padx=10)         self.pack()        def on_button(self):         res= []         for key, val in self.checkbuttons.items():            select= val.get()            if select:                 print(f'you selected {key}')                 if __name__ == '__main__':     app = tk.Tk()     main_frame = MainFrame()     app.mainloop()