pydda

import sys, pygame
from pygame import gfxdraw

pygame.init()
screen = pygame.display.set_mode((400,400))
screen.fill((0,0,0))
pygame.display.flip()

white=(255,255,255)

def ROUND(n):
    return int(n+0.5)

def dda(x1,y1,x2,y2):
    x,y = x1,y1
    length = (x2-x1) if (x2-x1) > (y2-y1) else (y2-y1)
    dx = (x2-x1)/float(length)
    dy = (y2-y1)/float(length)

    gfxdraw.pixel(screen,ROUND(x),ROUND(y),white)

    for i in range(length):
        x+= dx
        y+= dy
        print('The points are (x,y) (', x,', ', y,')')
        gfxdraw.pixel(screen,ROUND(x),ROUND(y),white)
    pygame.display.flip()

x1 = int(input('Enter the x1 point: '))
y1 = int(input('Enter the y1 point: '))
x2 = int(input('Enter the x2 point: '))
y2 = int(input('Enter the y2 point: '))

dda(x1, y1, x2, y2)

while 1:
    for event in pygame.event.get():
        if event.type == pygame.QUIT: sys.exit()


# a = input('Press any key to exit')