what function draws a straight line in tkinter on python 3 code example

Example 1: 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()

Example 2: how to draw polygon in tkinter

from tkinter import *

root = Tk()

c = Canvas(root)
c.pack()

points = [x1,y1, x2,y2, xn,yn]
c.create_polygon(points)

root.mainloop()