tkinter input box
import tkinter as tk
root= tk.Tk()
canvas1 = tk.Canvas(root, width = 400, height = 300)
canvas1.pack()
entry1 = tk.Entry (root)
canvas1.create_window(200, 140, window=entry1)
def getSquareRoot ():
x1 = entry1.get()
label1 = tk.Label(root, text= float(x1)**0.5)
canvas1.create_window(200, 230, window=label1)
button1 = tk.Button(text='Get the Square Root', command=getSquareRoot)
canvas1.create_window(200, 180, window=button1)
root.mainloop()