Python Bresenham 2

from graphics import *
import time

def BresenhamLine(x1,y1,x2,y2):
    """ Bresenham Line Drawing Algorithm For All Kind Of Slopes Of Line """

    dx = abs(x2 - x1)
    dy = abs(y2 - y1)
    slope = dy/float(dx)

    x, y = x1, y1

    # creating the window
    win = GraphWin('Brasenham Line', 600, 480)

    # checking the slope if slope > 1
    # then interchange the role of x and y
    if slope > 1:
        dx, dy = dy, dx
        x, y = y, x
        x1, y1 = y1, x1
        x2, y2 = y2, x2

    # initialization of the inital disision parameter
    p = 2 * dy - dx

    PutPixle(win, x, y)

    for k in range(2, dx):
        if p > 0:
            y = y + 1 if y < y2 else y - 1
            p = p + 2*(dy - dx)
        else:
            p = p + 2*dy

        x = x + 1 if x < x2 else x - 1

        # delay for 0.01 secs
        time.sleep(0.01)
        print('The points are (x,y) (', x,', ', y,')')
        PutPixle(win, x, y)

def PutPixle(win, x, y):
    """ Plot A Pixle In The Windows At Point (x, y) """
    pt = Point(x,y)
    pt.draw(win)

def main():
    x1 = int(input("Enter Start X: "))
    y1 = int(input("Enter Start Y: "))
    x2 = int(input("Enter End X: "))
    y2 = int(input("Enter End Y: "))

    BresenhamLine(x1, y1, x2, y2)

if __name__ == "__main__":
    main()
    a = input('Press any key to exit')