Code in text form, as well as screenshots, have been provided to verify indentation.
Code:
import tkinter as tk
from tkinter import messagebox
#function that called when Display Charges button is clicked
def dispCharges():
#check if a radio button is selected and the entry field contains a value
if minutes.get() != '' and v.get != 0:
tk.messagebox.showinfo("Total Charges", f'Your total charges = {int(minutes.get()) * v.get()}')
#create a tkinter window
root = tk.Tk()
#v stores the radio button option selected
v = tk.DoubleVar()
#minutes stores the value entered in the entry field
minutes = tk.StringVar()
#create radiobuttons
tk.Radiobutton(root, text='Daytime(6:00am - 5:59pm)', variable=v, value=0.07).pack()
tk.Radiobutton(root, text='Evening(6:00pm - 11:59pm)', variable=v, value=0.12).pack()
tk.Radiobutton(root, text='Off-Peak(12:00am - 5:59am)', variable=v, value=0.05).pack()
#container for label and entry field
mframe = tk.Frame(root)
mframe.pack()
#create label
tk.Label(mframe,text='Enter the number of minutes: ').pack(side=tk.LEFT)
#create entery field
tk.Entry(mframe, width=10, textvariable=minutes).pack()
#container for buttons
buttonframe = tk.Frame(root)
buttonframe.pack()
#create buttons in the the buttonframe
tk.Button(buttonframe, text='Display Charges', command=dispCharges).pack(side=tk.LEFT)
tk.Button(buttonframe, text='Quit', command=root.destroy).pack()
#loop gui program
tk.mainloop()
Code Screenshot
Output Screenshot
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