ranges

ranges_str = '1-2,8-15,23-25'
ranges_list = ranges_str.split(',')
result = []

for record in ranges_list:
    start, end = map(int, record.split('-'))
    for num in range(start, end + 1):
        result.append(num)

print(result)
# [1, 2, 8, 9, 10, 11, 12, 13, 14, 15, 23, 24, 25]