Use radiobuttons to determine a total charge

[SalsaBeanDip]

Hello. I am trying to write a GUI program that calculates total ticket prices. It allows the user to select a ticket category from a set of radiobuttons and enter the number of tickets into an Entry widget. Then an info dialog box displays the total charge. However, it just keeps displaying $0.0 as my total.

What am I doing wrong in my code? Why does it only display 0.0 and how can I display it with 2 decimal places?

The ticket prices are:
Senior: $7
Adult: $12
Child: $5

Here is my code:

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import tkinter import tkinter.messagebox     class TicketCalculatorGUI:     def __init__(self):         self.main_window = tkinter.Tk()         self.main_window.title('Ticket Price Calculator')           self.top_frame = tkinter.Frame(self.main_window)         self.mid_frame = tkinter.Frame(self.main_window)         self.bottom_frame = tkinter.Frame(self.main_window)           self.radio_var1 = tkinter.IntVar()         self.radio_var1.set(1)           # create radio buttons in top frame         self.rb_seniors = tkinter.Radiobutton(self.top_frame,                                               text='Senior (>65)',                                               variable=self.radio_var1,                                               value=7)         self.rb_adults = tkinter.Radiobutton(self.top_frame,                                              text='Adult (15-65)',                                              variable=self.radio_var1,                                              value=12)         self.rb_child = tkinter.Radiobutton(self.top_frame,                                             text='Child (5-15)',                                             variable=self.radio_var1,                                             value=5)         self.rb_seniors.pack()         self.rb_adults.pack()         self.rb_child.pack()           # in mid frame use entry widget to get number of tickets         self.prompt_label = tkinter.Label(self.mid_frame,                                           text='Enter the number of tickets:')         self.ticket_entry = tkinter.Entry(self.mid_frame,                                           width=10)         self.prompt_label.pack(side='left')         self.ticket_entry.pack(side='left')           # button in bottom frame should display total charges         self.calc_button = tkinter.Button(self.bottom_frame,                                           text='Display Charges',                                           command=self.convert)         self.quit_button = tkinter.Button(self.bottom_frame,                                           text='Quit',                                           command=self.main_window.destroy)         self.calc_button.pack(side='left')         self.quit_button.pack(side='left')           self.top_frame.pack()         self.mid_frame.pack()         self.bottom_frame.pack()           tkinter.mainloop()       def convert(self):         message = 'Your total charges = $'         ticket = self.ticket_entry.get()         total = 0.00         senior = 7         adult = 12         child = 5           if self.radio_var1.get() == 1:             total = ticket * senior         elif self.radio_var1.get() == 1:             total = ticket * adult         elif self.radio_var1.get() == 1:             total = ticket * child           tkinter.messagebox.showinfo('Total Charges', message + str(total))     if __name__ == '__main__':     tickets = TicketCalculatorGUI()

The output in the dialog box is:

Output:
Your total charges = $0.0

I don't think I am supposed to do

1 2	if self.radio_var1.get() == 1:             total = ticket * senior

What can I do different here?

[deanhystad]

None of these are ever True

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if self.radio_var1.get() == 1:     total = ticket * senior elif self.radio_var1.get() == 1:     total = ticket * adult elif self.radio_var1.get() == 1:     total = ticket * child

Because in this code you set the possible values for radio_var1 to be 5, 7 or 12.

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self.rb_seniors = tkinter.Radiobutton(self.top_frame,                                       text='Senior (>65)',                                       variable=self.radio_var1,                                       value=7) self.rb_adults = tkinter.Radiobutton(self.top_frame,                                      text='Adult (15-65)',                                      variable=self.radio_var1,                                      value=12) self.rb_child = tkinter.Radiobutton(self.top_frame,                                     text='Child (5-15)',                                     variable=self.radio_var1,                                     value=5)

You could change convert() to get the ticket value directly from radio_var1:

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def convert(self):     total = self.radio_var1.get() * self.ticket_entry.get()     tkinter.messagebox.showinfo('Total Charges', message + str(total))

But I don't think it is a good idea to hardcode the ticket cost int the radio buttons.

[SalsaBeanDip]

Thank you for the help. I was able to fix my problem

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def convert(self):     message = 'Your total charges = $'     ticket = self.ticket_entry.get()     total = 0.00       total = float(self.radio_var1.get()) * float(self.ticket_entry.get())     tkinter.messagebox.showinfo('Total Charges', message + str(f'{total:.2f}'))