數字龍捲風

 d1 = '''

3 4 2 1 4

4 2 3 8 9

2 1 9 5 6

4 2 3 7 8

1 2 6 4 3

'''

d = [[j for j in i.split()] for i in d1.strip().split('\n')]

def go():

    global turn,ctr,r,c

    turn = turn % 4

    if turn ==0:

        c-=1

    elif turn==1:

        r-=1

    elif turn==2:

        c+=1

    elif turn ==3:

        r+=1  

    print(d[r][c],end='')

    ctr += 1

    if ctr>=n**2: exit()

turn = 0

n = 5

r,c =n//2,n//2

ctr = 0

print(d[r][c],end='')

ctr += 1

if n==1:exit()

for i in range(1,6):

    for j in range(i):

        go()

    turn +=1

    for j in range(i):

        go()

    turn +=1