from PIL import Image

def shrink( original, palette ) :
    ''' returns a new image where colors from the original are replaced with
        their closest palette correspondents
    '''

    pass

def closest( pixel, palette ) :
    ''' Returns the color in palette closest to pixel
    '''

    pass

def euclidean( c1, c2 ) :
    ''' returns the euclidean distance between c1 and c2
    '''
    pass


if ( __name__ == '__main__') :

    import shrink_tester

    shrink_tester.test_shrink()