code: def _isdst(self, dt):
      tt = (
          dt.year,
          dt.month,
          dt.day,
          dt.hour,
          dt.minute,
          dt.second,
          dt.weekday(),
          0,
          0,
      )
      try:
          stamp = _time.mktime(tt)
      except (ValueError, OverflowError):
          return False  # Too far in the future, not relevant
  
      tt = _time.localtime(stamp)
      return tt.tm_isdst > 0
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import datetime
  import math
  import time
  from .py3 import string_types
label_desc: Use image node_id 4 for calling the _LocalTimezone obj's underlying member method code with example usage: obj._isdst(dt) and returns: unknown, False