turn times into readable strings

time.py

def days_from_today(field):
    '''Takes a python date object and returns days from today
    '''
    if isinstance(field, datetime.date):
        return (
            datetime.date(field.year, field.month, field.day) -
            datetime.date.today()
        ).days
    elif isinstance(field, datetime.datetime):
        field = field.replace(tzinfo=pytz.utc)
        return (
            datetime.datetime(field.year, field.month, field.day) -
            datetime.datetime.now(pytz.utc)
        ).days
    else:
        return field

def format_days_from_today(field):
    '''Uses days_from_today to build readable "X days ago"
    '''
    days = days_from_today(field)
    if days == 0:
        return 'Today'
    elif days == 1:
        return '{} day from now'.format(abs(days))
    elif days > 1:
        return '{} days from now'.format(abs(days))
    elif days == -1:
        return '{} day ago'.format(abs(days))
    else:
        return '{} days ago'.format(abs(days))