# Tkinter_create_circle_func.py

# Tkinter_create_circle_func.py

from Tkinter import *

canvas_width = 180
canvas_height =120

master = Tk()

w = Canvas(master,
           width=canvas_width,
           height=canvas_height)
w.pack()

def circle(x,y, r):
   id = w.create_oval(x-r,y-r,x+r,y+r)
   return id

circle(canvas_width/2,canvas_height/2,30)
circle(canvas_width/2,canvas_height/2,50)

mainloop()