gree-test1.py

def convert2d (m):
    l = len(m)
    for y in range(0, l):
        for x in range(0, l-y):
            m[x][y], m[l-1-y][l-1-x] = m[l-1-y][l-1-x], m[x][y]
    return m

def prettify (m):
    for r in m:
        print " " * 4 + str(r)
    print " "* 4 + "-." * 15

test = [str(i) for i in range(0, 10)] + [chr(i) for i in range(65, 91)]
m = [test[i*6: i*6+6] for i in range (0, 6)]
prettify(m)
prettify(convert2d(m))