【Python 训练营】N_12 打印菱形图案

# 方法一
for i in range(4):
    block = '*'*(2*i+1)
    print('{:^7}'.format(block))
for j in range(3):
    block = '*'*(4-2*j+1)
    print('{:^7}'.format(block))
# 方法二
from sys import stdout
for i in range(4):
    for j in range(2 - i + 1):
        stdout.write(' ')
    for k in range(2 * i + 1):
        stdout.write('*')
    print()
 
for i in range(3):
    for j in range(i + 1):
        stdout.write(' ')
    for k in range(4 - 2 * i + 1):
        stdout.write('*')
    print()