haz un rectangulo con un circulo dentro con tkinter

import tkinter

def rectangle_with_circle(canvas, x1, y1, x2, y2):
  canvas.create_rectangle(x1, y1, x2, y2)
  create_circle(canvas, (x1 + x2) / 2, (y1 + y2) / 2, abs(x1 - x2) / 2)
  
def create_circle(canvas, x, y, radius)
  x0 = x - radius
  y0 = y - radius
  x1 = x + radius
  y1 = y + radius
  return canvas.create_oval(x0, y0, x1, y1)

window = tkinter.Tk()
canvas = tkinter.Canvas(window, width=500, height=500)
canvas.pack()

rectangle_with_circle(canvas, 100, 100, 200, 200)

window.mainloop()