load image and set transparency

import pygame

import random

pygame.init()

black = [0, 0, 0]

white = [255,255,255]

sizeX = 400

sizeY = 500

size = [sizeX, sizeY]

screen = pygame.display.set_mode(size)

pygame.display.set_caption("Denkybrain Loves Graphics")

done = False

clock = pygame.time.Clock()

## go type codes here

c = pygame.image.load("a.png").convert()

c.set_colorkey(black)

#make the black color transparent color

###

while done == False:

    clock.tick(20)

    for event in pygame.event.get() :

        if event.type == pygame.QUIT :

            done = True

    screen.fill(white)

    screen.blit(c, [100,100] )

    pygame.display.flip()

pygame.quit()

image from  https://s3.amazonaws.com/gameartpartnersimagehost/wp-content/uploads/edd/2015/09/Zombie-Army-Character-Royalty-Free-Game-Art.png