def triangles():
result = [1]
yield result
result = [1,1]
while True:
result = [result[i-1]+result[i] for i in range(1,len(result))]
result.insert(0,1)
result.append(1)
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南丁叔叔
def triangles():
result = [1]
yield result
result = [1,1]
yield result
while True:
result = [result[i-1]+result[i] for i in range(1,len(result))]
result.insert(0,1)
result.append(1)
yield result