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The block is only used to grab a >>> reference to the mdict, which is stored in the mdict_iterator. > > Andrew> Isn't there a contradiction between these two sentences? Either the > Andrew> block is not used, or it's used to access the mdict? > > It's used when initializing the iterator but not afterward, so there's > no need to store it. > > Tom I can see why that sentence can be confusing. I will clarify that I am talking about the block parameter vs the block union member. Simon