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make elements of a list twice or more.

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Sorry for the title which didn't make clear.

Here is a list x = [b, a, c] (a, b, c are elements of x. Each of them are
different type).  Now I wanna generate a new list as [b, b, a, a, c, c].

I know we can do like that:

tmp = []
for i in x:
    tmp.append(i)
    tmp.append(i)

However, I wander is there a more beautiful way to do it, like [i for i in
x]?

Thanks.


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make elements of a list twice or more. liuerfire Wang <liuerfire@gmail.com> - 2013-08-07 16:50 +0800
  Re: make elements of a list twice or more. alex23 <wuwei23@gmail.com> - 2013-08-20 13:42 +1000
  Re: make elements of a list twice or more. Tobiah <toby@tobiah.org> - 2013-08-21 13:01 -0700

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