第二十三题

题目：

my_code:

for i in range(1,9,2):
    print('%s%s%s'%(int((7-i)/2)*' ',int(i)*'*',int((7-i)/2)*' '))

for j in range(5,0,-2):
    print('%s%s%s'%(int((7-j)/2)*' ',int(j)*'*',int((7-j)/2)*' '))