>>> def triangles():
... l=[1]
... while True:
... yield l
... l=[(l+[0])[i]+([0]+l)[i]for i in range(l)+1]
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Crazy丶白白
>>> def triangles():
... l=[1]
... while True:
... yield l
... l=[(l+[0])[i]+([0]+l)[i]for i in range(l)+1]