def san(length):
for i in range(1,length+1):
print(‘* ‘*i)
san(6)
4、左下角等腰（空心）
def san(length):
for i in range(1,length+1):
if i == 1 or i == 2 or i == length:
print(‘* ‘*i)
else:
print(‘*‘ + ‘ ‘ * ((i-2)*2+1) + ‘*‘)
san(8)
5、左上角等腰
def san(length):
for i in range(1,length+1)[::-1]:
print(‘* ‘*i)
san(8)
6、右下角等腰
def san(length):
for i in range(1,length+1):
print(‘ ‘ * ((length - i)*2 ) + ‘ *‘*i)
san(8)
7、右上角等腰
def san(length):
for i in range(1,length+1)[::-1]:
print(‘ ‘ * ((length - i)*2 ) + ‘ *‘*i)
san(8)
8、等边三角形
def san(length):
for i in range(1,length+1):
print(‘ ‘ * (length - i) + ‘* ‘* i + ‘ ‘ * ((length - i)-1))
san(6)
9、倒等边三角
def san(length):
for i in range(1,length+1)[::-1]:
print(‘ ‘ * (length - i) + ‘* ‘* i + ‘ ‘ * ((length - i)-1))
san(6)
