Move a rectangle with text inside of it with tkinter

I am answering to a question that was made to me on my youtube channel. Someone asked me how to put a text into a rectangle that was moved on a canvas in tkinter with the keys a, w, s,d. I answered with the following code:

import tkinter as tk

root = tk.Tk()

canvas_width = 600
canvas_height = 400
w = canvas_width // 2
h = canvas_height // 2
canvas = tk.Canvas(root, width=canvas_width, height=canvas_height)
canvas.pack()

r1 = canvas.create_rectangle(w, h, w + 40, h + 10)
t = canvas.create_text(w + 20, h + 5, text="Hello")


def keypress(event):
    """The 4 key press"""
    x, y = 0, 0
    if event.char == "a":
        x = -10
    if event.char == "d":
        x = 10
    if event.char == "w":
        y = -10
    if event.char == "s":
        y = 10
    canvas.move(r1, x, y)
    canvas.move(t, x, y)


root.bind("<Key>", keypress)
root.mainloop()