code: def ddayset(self, year, month, day):
      dset = [None] * self.yearlen
      i = datetime.date(year, month, day).toordinal() - self.yearordinal
      dset[i] = i
      return dset, i, i + 1
  
imports: import calendar
  import datetime
  import heapq
  import itertools
  import re
  import sys
  from functools import wraps
  from warnings import warn
  from six import advance_iterator, integer_types
  from six.moves import _thread, range
  from ._common import weekday
label_desc: Use image node_id 6 for calling the _iterinfo obj's underlying member method code with example usage: obj.ddayset(year, month, day) and returns: dset,  i,  unknown