Skip Montanaro於 2014年1月31日星期五UTC+8下午6時29分27秒寫道： > Google for "python flatten list." > > > > This question comes up frequently, though I'm not sure if that's > > because it's a common homework problem or because people are unaware > > of the += operator (or extend method) for lists, and so build > > lists-of-lists when they could just build them flat in the first > > place. > > > > Skip thanks. a keyword is all I need. It is not homework. It is a common problem I guess.
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