<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def parse_time_arg(s):
 """ Parse a time stamp in the "year-month-day hour-minute" format. """

    try:
        return time.strptime(s, "%Y-%m-%d %H:%M")
    except ValueError as e:
        raise argparse.ArgumentTypeError(e)