Example of reading a directory and returning the latest file matching a string using python.

latest_match_from_path.py

def latest_match_from(path, match):
    # read the modification time
    mtime = lambda f: os.stat(os.path.join(path, f)).st_mtime
    # read all files from path and sort based on modification time
    files = list(sorted(os.listdir(path), key=mtime))
    # filter based on match
    matches = [a for a in files if match in a]
    # return the full path of the most recent match
    return os.path.join(path, matches[-1])