My gui

[Daniel Kersgaard]

Today, being the last day of lectures at school, my instructor ran briefly through Tkninter and GUIs. I'd been looking forward to this particular lesson all semester, but when I got home and copied a sample program from my textbook verbatim, IDLE does nothing. No error, no nothing. Any ideas? Here  is the code from my program. I'm not sure if this is appropriate, but suggestions are helpful.

import tkinter
import tkinter.messagebox

class MyGui:
    def _init_(self):
        self.main_window = tkinter.Tk()

        self.top_frame = tkinter.Frame(self.main_window)
        self.bottom_frame = tkinter.Frame(self.main_window)

        self.prompt_label = tkinter.Label(self.top_frame, text = 'Enter a distance in Kilometers: ')
        self.kilo_entry = tkinter.Entry(self.top_frame, width = 10)

        self.prompt_label.pack(side = 'left')
        self.kilo_entry.pack(side = 'left')

        self.calc_button = tkinter.Button(self.bottom_frame, text = 'Convert', 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.bottom_frame.pack()

        tkinter.mainloop()

    def convert(self):
        kilo = float(self.kilo_entry.get())

        miles = kilo * 0.6214

        tkinter.messagebox.showinfo('Result', str(kilo) + ' kilometers is equal to ' + str(miles) + 'miles.')

poop = MyGui()