<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _next_year():
 """Get the date of today plus one year. :rtype: str :returns: The date of this day next year, in the format '%Y-%m-%d'. """

    now = datetime.now().__str__()
    date = now.split(' ', 1)[0]
    year, month, day = date.split('-', 2)
    next_year = str(int(year)+1)
    return '-'.join((next_year, month, day))