repeat items in a list

[larudwer]

Am 27.03.2016 um 13:13 schrieb Antonio Caminero Garcia:
> On Sunday, March 27, 2016 at 11:52:22 AM UTC+2, larudwer wrote:
>> how about
>>
>>   >>>> sorted(["a", "b"]*3)
>> ['a', 'a', 'a', 'b', 'b', 'b']
>
> that's cooler, less efficient though and do not maintain the original order.
> In case such order was important, you should proceed as follows:
>
> If the elements are unique, this would work:
>
> sorted(sequence*nrep, key=sequence.index)
>
> Otherwise you'd need a more complex key function (maybe a method of a class with
 > a static variable that tracks the number of times that such method is 
called and
 > with a "dynamic index functionality" that acts accordingly (i-th 
nrep-group of value v))
 > and imo it does not worth it.
>


in case you want to mainain order:

 >>>> ["a","b"]*3
['a', 'b', 'a', 'b', 'a', 'b']

is completely suffincient.