self.canvas.create_rectangle(148, 10, 194, 56, fill='red') code example

Example 1: tkinter draw squaer

canvas.create_rectangle(30, 10, 120, 80,
    outline="#fb0", fill="#fb0")

Example 2: tkinter draw squaer

from Tkinter import *
master = Tk()

w = Canvas(master, width=250, height=200)
w.create_rectangle(0, 0, 100, 100, fill="blue", outline = 'blue')
w.create_rectangle(50, 50, 100, 100, fill="red", outline = 'blue') 
w.pack()
master.mainloop()