If I want to create a list of the form [100, 99, 99, 98, 98, 97, 97...] (where each item is repeated twice after the first one), how might I do that most efficiently?
Right now I have this:
series = [100]
for x in range(10): # just for testing
series.append(series[-1] - 1)
But of course that only does it once, and I don't want to have to copy
and paste the append line. Perhaps there's a better way than this.
Thanks.
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