def triangles(): l=[] while 1: for i in range(0,len(l)-1): l[i] = l[i] + l[i+1] l.insert(0,1) yield l
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King_Zevin
def triangles(): l=[] while 1: for i in range(0,len(l)-1): l[i] = l[i] + l[i+1] l.insert(0,1) yield l