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通过^_^

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#1 Created at ... [Delete] [Delete and Lock User] 
def triangles():
    list_up = [1]
    while True:
        yield list_up
        list_down = [1]
        for i in range(len(list_up)-1):
            list_down.append(list_up[i] + list_up[i+1])
        list_down.append(1)
        list_up = list_down
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