下面两种方法差不多是一种思路,就是在后面“补0” ,就是在要打印的列表使用yield返回去之后,在后面用append在后面加一个0,好利用杨辉三角的规律,list_new[i] = list_old[i-1] + list_old[i]的规律。
[1]
过渡[1] 0
[1, 1]
过渡[1, 1]0
[1, 2, 1]
过渡[1, 2, 1]0
[1, 3, 3, 1]
过渡[1, 3, 3, 1]0
[1, 4, 6, 4, 1]
过渡[1, 4, 6, 4, 1]0
[1, 5, 10, 10, 5, 1]
过渡[1, 5, 10, 10, 5, 1]0
[1, 6, 15, 20, 15, 6, 1]
过渡[1, 6, 15, 20, 15, 6, 1]0
方法1:
def triangles():
a = [1]
while True:
yield a
a = [sum(i) for i in zip([0] + a, a + [0])]
n = 0
for t in triangles():
print(t)
n = n + 1
if n == 10:
break
转载自:https://www.jianshu.com/p/dbc6e7637d3a
方法2:
# -*- coding: utf-8 -*-
def triangles():
N=[1]
while True:
yield N #generator函数与普通函数的差别:在执行过程中,遇到yield就中断,下次又继续执行
N.append(0)
N=[N[i-1] + N[i] for i in range(len(N))] #写法
if __name__ == '__main__':
n=0
for t in triangles():
print(t)
n=n+1
if n == 10:
break
转载自:https://blog.csdn.net/sinat_28296297/article/details/77340618
运行结果都是:
==================== RESTART: C:/Users/公有制/Desktop/tri.py ====================
[1]
[1, 1]
[1, 2, 1]
[1, 3, 3, 1]
[1, 4, 6, 4, 1]
[1, 5, 10, 10, 5, 1]
[1, 6, 15, 20, 15, 6, 1]
[1, 7, 21, 35, 35, 21, 7, 1]
[1, 8, 28, 56, 70, 56, 28, 8, 1]
[1, 9, 36, 84, 126, 126, 84, 36, 9, 1]