[Python-Dev] inplace operators and __setitem__

Hi, a general question. Consider: class A(list): def __setitem__(self, index, item): # do something with index and item return list.__setitem__(self, index, item) lst = A([1,set()]) lst[0] |= 1 lst[1] |= set([1]) Do we want lst.__setitem__ to be called in the second inplace assignment? A case where this matters is here: http://python.org/sf/1306777 Reinhold -- Mail address is perfectly valid!