Python tkinter Spinbox self contained example v1.3

"""Spinbox, self contained example v1.3
   By Steve Shambles. Upadted Nov 2019

   Plenty more outrageous code atrocities at:
   stevepython.wordpress.com
   """

from tkinter import Button, IntVar, LabelFrame
from tkinter import messagebox, N, RIDGE, Spinbox, TclError, Tk, W

root = Tk()
root.title('Spinbox V1.2')
root.geometry('180x90')
root.resizable(False, False)

def spn_bx_val():
    """Get value from the spinbox. Show value in a pop up."""

    # If input is invalid, eg.non-numeric, then return
    try:
        spv = VAR.get()
    except TclError:
        return

    messagebox.showinfo('Spinbox', 'Spinbox value is currently '+str(spv))

# Create labelframe for the spinbox.
spinbox_frame = LabelFrame(root, relief=RIDGE,
                           fg='blue', text='Spinbox')
spinbox_frame.grid(sticky=N, padx=10, pady=13)

# Create the spinbox.
VAR = IntVar()
VAR.set(50) # Default start value.
SPIN = Spinbox(spinbox_frame, from_=0, to=100, width=4, textvariable=VAR)

# Create the 'spinbox value' button.
Button(spinbox_frame, bg='green2', text='Spinbox value',
       command=spn_bx_val).grid(row=0, column=1, sticky=W)
SPIN.grid(column=0, row=0, padx=10, pady=10)

root.mainloop()