格式如图：
代码实现：
def triangle(row):
for i in range(1,row+1):
for x in range(i):
print('*',end='')
print()
for i in range(1,row+1):
for x in range(row-i):
print(' ', end='')
for x in range(i):
print('*', end='')
print()
for i in range(1, row + 1):
a=row-i
for x in range(a):
print(' ',end='')
for x in range(2*i-1):
print('*', end='')
print()
row = int(input())
triangle(row)
标签：end,python,打印,range,print,triangle,三角形,row From： https://www.cnblogs.com/cs0513/p/18067024