``` 在此插入代码
```def triangles(): n,l=0,[[1]] while 1: yield l l.append([sum(i) for i in zip([0]+l[n],l[n]+[0])]) n=n+1 return l
Sign in to make a reply
晶雷
``` 在此插入代码
```def triangles(): n,l=0,[[1]] while 1: yield l l.append([sum(i) for i in zip([0]+l[n],l[n]+[0])]) n=n+1 return l