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作业

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余生属于你

#1 Created at ... [Delete] [Delete and Lock User] 
def triangles() :
     r = [1]
     while True:
             yield r
             r = [([0]+r)[i] + (r+[0])[i] for i in range(0, len(r)+1)]

三分钟暴躁

#2 Created at ... [Delete] [Delete and Lock User]

求解释（[0]+r)[i] + (r+[0]）这一部分啊

九点半基恩

#3 Created at ... [Delete] [Delete and Lock User]

[0]+ r是一个新list， （[0]+r）[i]指取第i位 比如：1 1 以及下一行1 2 1 1 1 -- ([0]+r)[i]for i in range(0, len(r)+1) -- 0 1 1 1 1 -- (r+[0])[i]for i in range(0, len(r)+1) -- 1 1 0 相加 -- 1 2 1 楼主的做法很简洁粗暴啊

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