在 2016年9月20日星期二 UTC-4上午9:35:50，Random832写道： > On Tue, Sep 20, 2016, at 09:19, 38016226...@gmail.com wrote: > > >>> x = [1, 2, 3] > > >>> y = [4, 5, 6] > > >>> zipped = zip(x, y) > > >>> list(zipped) > > [(1, 4), (2, 5), (3, 6)] > > >>> x2, y2 = zip(*zip(x, y)) > > >>> x == list(x2) and y == list(y2) > > True > > > > My problem is >>> x2, y2 = zip(*zip(x, y)). > > zip return an iterator but x2 and y2 are different? > > I really need detail explanation about this line. > > Well, as you've seen, zip(x, y) is (1, 4), (2, 5), (3, 6) > > This means that zip(*...) is zip((1, 4), (2, 5), (3, 6)). It takes the > first element of each argument (1, 2, and 3), and then the next element > of each argument (4, 5, and 6).
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