You can use glob.
import osfrom glob import globglob_pattern = os.path.join('dumps', '*')files = sorted(glob(glob_pattern), key=os.path.getctime)
files = sorted(os.listdir('dumps'), key=lambda fn:os.path.getctime(os.path.join('dumps', fn)))
files = sorted([os.path.join('dumps', file) for file in os.listdir('dumps')], key=os.path.getctime)