repeat items in a list

[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.