Untitled

im=Image.open(archivo)gris=[]xsize,ysize=im.sizecont=0for x in range(0,xsize):    for y in range(0,ysize):        r,g,b=im.getpixel((x,y))        colour=(r+g+b)/3        im.putpixel((x,y),(colour,colour,colour))        print cont,x,y,r,g,b,colour        cont+=1        gris=im.point(lambda i: i)gris.save("engrises.jpg")