code: def _get_local_timestamp(self, dt):
      return (
          (dt.toordinal() - EPOCHORDINAL) * 86400
          + dt.hour * 3600
          + dt.minute * 60
          + dt.second
      )
  
imports: import bisect
  import calendar
  import collections
  import functools
  import re
  import weakref
  from datetime import datetime, timedelta, tzinfo
  from .None import _common, _tzpath
label_desc: Use image node_id 13 for calling the ZoneInfo obj's underlying member method code with example usage: obj._get_local_timestamp(dt) and returns: unknown