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了此本心

#1 Created at ... [Delete] [Delete and Lock User] 
def triangles():
    L = []
    while True:
        L.append(1)
        temp = L[:]
        for i,value in enumerate(temp) if i!=0 and i!=len(temp)-1:            
            L[i] = temp[i-1]+ temp[i]
        yield L

了此本心

#2 Created at ... [Delete] [Delete and Lock User] 
def triangles():
    L = []
    while True:
        L.append(1)
        temp = L[:]
        for i,value in enumerate(temp):
            if i!=0 and i!=len(temp)-1:
                L[i] = temp[i-1]+ temp[i]    
        yield L

提交评论前把if置于上一行了。发现不行。 等我再试简化

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