#coding='utf-8'
class operator:
@classmethod #计算每一行杨辉三角
def sim(cls,a):
c = [0 for i in range(len(a) + 1)]
a.append(0)
a.insert(0, 0)
for i in range(len(a) - 1):
c = a + a[i + 1]
#print(c)
return c
@classmethod #储存杨辉三角数据
def cal(cls,n):
s = ['0' for i in range(n)]
i9 = [1,]
for i in range(n):
s = i9
i += 1
i9 = cls.sim(i9)
return s
@classmethod
def dis(cls,n): #显示设置
n1 = len(n)
n2 = len(''.join([i1 + ' ' for i1 in map(str, n[n1 - 1])]))
for i in range(n1):
c = ''.join([i1 + ' ' for i1 in map(str, n)])
print(c.center(n2))
try:
n = int(input('请输入杨辉三角显示行数:'))
# print(cal(n))
# print(sim([1,]))
if n >= 1:
n = int(n)
c = operator.cal(n)
#for i in range(len(c)):
# c=c[1:-1] print(operator.dis(c))
else:
print('请输入大于1的整数')
except ValueError:
print('请输入大于1的整数')