What's the most elegant way to get the end of the day (datetime)?

Question

I\'m currently writing some reporting code that allows users to optionally specify a date range. The way it works (simplified), is:

• A user (optionally) specifies a

Answer 1

To set the stop_time, advance start_time one year, month or day as appropriate, then subtract one timedelta(microseconds=1)

if options['year']:
    start_time = start_time.replace(year=options['year'], month=1, day=1)
    stop_time = stop_time.replace(year=options['year']+1)-timedelta(microseconds=1)

elif options['month']:
    start_time = start_time.replace(month=options['month'], day=1)
    months=options['month']%12+1
    stop_time = stop_time.replace(month=months,day=1)-timedelta(microseconds=1)

else:
    start_time = start_time.replace(day=options['day'])
    stop_time = stop_time.replace(day=options['day'])+timedelta(days=1,microseconds=-1)