Introduction-to-Tkinter-in-Python/myscript_3.py at master · thugge254/Introduction-to-Tkinter-in-Python · GitHub

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import tkinter as tk
from tkinter import ttk
import ttkbootstrap as ttk

window = tk.Tk()
window.title("Demo")
window.geometry("300x150")

# title
title_abel = ttk.Label(master=window,
                        text="Miles to kilometer",
                        font="calibre 24 bold")
title_abel.pack()


def convert_func():
    mile_input = entry_int.get()
    km_output = mile_input*1.61
    output_string.set(km_output)


# input field
input_frame = ttk.Frame(master=window)
entry_int = tk.IntVar()
input_frame.pack(pady=10)
entry = ttk.Entry(master=input_frame,
                   textvariable=entry_int)
entry.pack(side="left", padx=10)
button = ttk.Button(master=input_frame,
                     text="Convert",
                     command=convert_func)
button.pack(side="left")

# output
output_string = tk.StringVar()
output_label = ttk.Label(master=window,
                          text="Output",
                          font="Calibre 20",
                          textvariable=output_string)
output_label.pack(pady=5)


window.mainloop()