# -*- coding: utf-8 -*-

def triangles():

# 期待輸出:
# [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():
    print(t)
    results.append(t)
    n = n + 1
    if n == 10:
        break
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(‘測試通過!‘)
else:
    print(‘測試失敗!‘)

然後在參考了一些博客之後，找到了一個相對我能理解的，並之後自己寫出來的一個方法：

def triangles():
    templist=[]
    mylist=[1]
    while True:
        yield mylist

        mylist.append(0)
        for n in range(len(mylist)):
            templist.append(mylist[n]+mylist[n-1])
        mylist=templist
        templist=[];

自己去用筆算一下，

然後註意下 range函數的作用：

range[5]=[0,1,2,3,4]

然後就知道該怎麽樣了