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

s = "2,5,7-9,12"
ranges = (x.split("-") for x in s.split(","))
print [i for r in ranges for i in range(int(r[0]), int(r[-1]) + 1)]

prints

[2, 5, 7, 8, 9, 12]