code: def memorized_timedelta(seconds):
      """Create only one instance of each distinct timedelta"""
      try:
          return _timedelta_cache[seconds]
      except KeyError:
          delta = timedelta(seconds=seconds)
          _timedelta_cache[seconds] = delta
          return delta
  
imports: from datetime import datetime, timedelta, tzinfo
  from bisect import bisect_right
  import pytz
  from pytz.exceptions import AmbiguousTimeError, NonExistentTimeError
label_desc: Use image node_id 1 for calling a global function with example usage: memorized_timedelta(seconds) and returns: _timedelta_cache, delta