How to extract characters from file names in a directory?

Question

Essentially, if I have a file:

"Field_20130515-212300"

I want to extract the date 20130515-212300 . I have a method, but it is inelegant. Just wondering if there's a better way to do this.

times = os.listdir("path\\to\\your\\file")
for idx, time in enumerate(times):
    time[idx] = time[-15:]

Answer 1

This has been solved using list comprehension thanks to @alani.

times = os.listdir("path\\to\\your\\file")
times = [t.split("_")[1] for t in times]

Answer 2

Seems simple to do it in a one liner..

import os
times = [file[-15:] for file in os.listdir('path\\to\\your\\file')]

Or with split()

import os
times = [file.split('_')[1] for file in os.listdir('path\\to\\your\\file')]