不懂就问
Topic source
def tri():
a = [1]
while 1:
yield a
a.append(1)
b = a[:]
for n in range(len(a)-2):
a[n+1] = b[n] + b[n+1]
n = 0
results = []
for t in tri():
results.append(t)
print(t)
print(results)
n = n + 1
if n == 3:
break
以下是我的结果，请问这是为什么？？
[1]
[[1]]
[1, 1]
[[1, 1], [1, 1]]
[1, 2, 1]
[[1, 2, 1], [1, 2, 1], [1, 2, 1]]
- 1
路遥无马
评论区的大家的方法调用next()返回始终为[1]；方法一的问题for t in triangles(): print(t)打印出来的结果是正常的，但页面的测试会失败；方法二都正常，本质区别是什么。
方法一：
def triangles():a=[1]while True:yield aa.append(1)b = a[:]for n in range(len(a)-2):a[n+1] = b[n] + b[n+1]方法二
def triangles():a = [1]b = [1]while True:yield ab.append(1)for n in range(len(a)-1):b[n+1] = a[n] + a[n+1]a = b[:]