def PrintListofStrings( alist ):
    """Prints each character in the list of string one by one """
    
    for i in range(len(alist)):
        for j in range(len(alist[i])):
            print('\'',alist[i][j], '\'', end = "", sep = " ")
        print()


from PIL import Image

def SimpleDrawing():
    """ Draws a very simple image"""
    
    height = 100
    width = 200
    dst = Image.new('RGB', (width,height), (255,255,0) )
    
    
    
    # allows us to access every pixel
    pixels = dst.load()
    
    for y in range(height//2):
        for x in range(width//2):
            rgb = pixels[x,y]
    
            pixels[x,y] = (0,0,255)
    
    
    dst.show()
    
    #return 




def Downsampling(src):
    """ Create a new image based upon our old image that is half the resolution"""
    
    #get width and height of image
    minX, minY, width, height = src.getbbox()
    
    # Creates a new image with twice the height and width
    dst = Image.new('RGB',(width // 2,height // 2), (255,255,255) )
    
    # Allows us to directly manipulate image pixels
    srcpixels = src.load()
    dstpixels = dst.load()

    for y in range(height//2):
        for x in range(width//2):
            rgb1 = srcpixels[2*x,2*y]
            rgb2 = srcpixels[2*x+1,2*y]
            rgb3 = srcpixels[2*x,2*y+1]
            rgb4 = srcpixels[2*x+1,2*y+1]
            
            red = (rgb1[0] + rgb2[0] + rgb3[0] + rgb4[0] ) // 4
            green = (rgb1[1] + rgb2[1] + rgb3[1] + rgb4[1] ) // 4
            blue = (rgb1[2] + rgb2[2] + rgb3[2] + rgb4[2] ) // 4

            dstpixels[x,y] = red,green,blue

    return dst



def Upsampling(src):
    """ Enlarges the source image to twice the resolution"""
    
    #get width and height of image
    minX, minY, width, height = src.getbbox()
    
    # Creates a new image with twice the height and width
    dst = Image.new('RGB',(width * 2,height * 2), (255,255,255) )
    
    # Allows us to directly manipulate image pixels
    srcpixels = src.load()
    dstpixels = dst.load()
    
    for y in range(height):
        for x in range(width):
            rgb = srcpixels[x,y]
            
            dstpixels[2*x, 2*y] = rgb
            dstpixels[2*x, 2*y+1] = rgb
            dstpixels[2*x+1, 2*y] = rgb
            dstpixels[2*x+1, 2*y+1] = rgb
    
    return dst