GUI Tip Calculator

[djkraft]

I am working on a GUI tip calculator. The calculator needs to take entry from the user and have radio buttons to designate the tip percentage, display the tip amount and total cost. I keep getting this attribute error: "AttributeError: 'TipCalculator' object has no attribute 'meal_cost'"

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from tkinter import *   class TipCalculator():           def __init__(self):         my_window = Tk()                   meal_cost = StringVar()         tip_percent = IntVar()         tip = StringVar()         total_cost = StringVar()           my_window.title("Tip Calculator")                   bill_amount_label = Label(text = "Bill Amount")         bill_amount_label.grid(column = 2, row =1)         bill_amount_entry = Entry(textvariable = meal_cost, width = 7, justify = RIGHT)         bill_amount_entry.grid(column = 2, row = 2)                   tip_amounts = Label(text = "Tip Percentage")         tip_amounts.grid(column = 1, row = 1)         ten_percent_tip = Radiobutton(text = "10%", variable = tip_percent, value = 10)         ten_percent_tip.grid(column = 1, row = 2)                fifteen_percent_tip = Radiobutton(text = "15%", variable = tip_percent, value = 15)         fifteen_percent_tip.grid(column = 1, row = 3)                eighteen_percent_tip = Radiobutton(text = "18%", variable = tip_percent, value = 18)         eighteen_percent_tip.grid(column = 1, row = 4)                twenty_percent_tip = Radiobutton(text = "20%", variable = tip_percent, value = 20)         twenty_percent_tip.grid(column = 1, row = 5)                        calculate_tip = Button(text = "Calculate Tip", command = self.calculate_tip)         calculate_tip.grid(column = 2, row = 3)           tip_amount_label = Label(text = "Tip Amount:")         tip_amount_label.grid(column = 2, row = 4)         tip_amount = Label(textvariable = tip, width = 7, justify = RIGHT)         tip_amount.grid(column = 3, row = 4)                   bill_amount_label = Label(text = "Bill Total:")         bill_amount_label.grid(column = 2, row = 5)         bill_amount = Label(textvariable = total_cost, width = 7, justify = RIGHT)         bill_amount.grid(column = 3, row = 5)                   my_window.mainloop()                                    def calculate_tip(self):             pre_tip = float(self.meal_cost.get())         percentage = self.tip_percent.get() / 100         tip_amount = pre_tip * percentage         self.tip.set(tip_amount)                   bill_total = pre_tip + tip_amount         self.total_cost.set(bill_total)         TipCalculator()

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Actually figured it out right after I posted this.

[DeaD_EyE]

Change the assignment in __init__ from
meal_cost = StringVar()
to
self.meal_cost = StringVar()

Change the attribute access in your class from meal_cost to self.meal_cost.