def triangles():

list = [1]

while True:

yield list

print(list)

tmp = list + [0]

list = [tmp[i] + tmp[i - 1] for i in range(len(tmp))]

# list.append(0)

# list = [list[i] + list[i-1] for i in range(len(list))]

# 期待输出:

# [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]

n = 0

results = []

for t in triangles():

results.append(t)

n = n + 1

if n == 10:

break

for t in results:

print(t)

if results == [

[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]

]:

print('测试通过!')

else:

print('测试失败!')