parse string of integer sets with intervals to list

Question

I have \"2,5,7-9,12\" string.

I want to get [2, 5, 7, 8, 9, 12] list from it.

Is there any built-in function for it in python?

Thanks.

Answer 1

Not that I'm aware of, but you can easily make your own:

1. Create a results list.
2. Split strings by , and start iterating over the result.
   1. If the current string contains a - append a range to the list.
   2. If the current string is a number, append it to the list.
   3. Else return an error.
3. Return the list.