def trangles():
ret = [1]
while True:
yield ret[:]
for i in range(1,len(ret)):
ret[i]=pre[i]+pre[i-1]
ret.append(1)
pre=ret[:]
来源:https://www.bilibili.com/video/BV1qE411674j?p=50
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宇宙计时器
def trangles():
ret = [1]
while True:
yield ret[:]
for i in range(1,len(ret)):
ret[i]=pre[i]+pre[i-1]
ret.append(1)
pre=ret[:]
来源:https://www.bilibili.com/video/BV1qE411674j?p=50