In this GUI, the components in the frame are organized in a grid that has import tkinter as tk
2. from tkinter import ttk
3. class TipCalcFrame(ttk. Frame):
4. def __init__(self, parent):
5. ttk. Frame.__init__(self, parent, padding="20 20 20 20")
6. self. pack()
7. self. mealCost = tk. StringVar()
8. self. tipPercent = tk. StringVar()
9. self. tipAmount = tk. StringVar()
10. ttk. Label(self, text="Cost of your meal:").grid(
column=0, row=0, sticky=tk. E)
11. ttk. Entry(self, width=30, textvariable=self. mealCost).grid(
column=1, row=0)
12. ttk. Label(self, text="Percent to leave as a tip:").grid(
column=0, row=1, sticky=tk. E)
13. ttk. Entry(self, width=30, textvariable=self. tipPercent).grid(
column=1, row=1)
14. ttk. Label(self, text="Tip amount:").grid(
column=0, row=2, sticky=tk. E)
15. ttk. Entry(self, width=30, textvariable=self. tipAmount,