code: def pull(
      cls,
      buffers,
      ctx: "Context",
      federation: "Federation",
      name: str,
      tag: str,
      party: PartyMeta,
  ):
      mode = _FederationBytesCoder.decode_mode(buffers)
      if mode == 0:
          with io.BytesIO(
              _FederationBytesCoder.decode_base(buffers)
          ) as f:
              unpickler = TableRemotePersistentUnpickler(
                  ctx, federation, name, tag, party, f
              )
              return unpickler.load()
      elif mode == 1:
          # get num_slice and slice_size
          (
              table_meta,
              total_size,
              num_slice,
              slice_size,
          ) = _FederationBytesCoder.decode_split(buffers)
  
          # pull the slice table with a special key
          slice_table = federation.pull_table(
              name=_SplitTableUtil.get_split_table_key(name),
              tag=tag,
              parties=[party],
              table_metas=[table_meta],
          )[0]
          # merge the bytes
          with io.BytesIO() as f:
              for i, b in slice_table.collect():
                  f.seek(i * slice_size)
                  f.write(b)
              f.seek(0)
              unpickler = TableRemotePersistentUnpickler(
                  ctx, federation, name, tag, party, f
              )
              return unpickler.load()
      else:
          raise ValueError(f"invalid mode: {mode}")
  
imports: import io
  import logging
  import pickle
  import struct
  import typing
  from typing import Any, List, Tuple, TypeVar
  from fate.arch.config import cfg
  from ._table_meta import TableMeta
  from ._type import PartyMeta
label_desc: Use image node_id 4 for calling the TableRemotePersistentUnpickler obj's underlying member method code with example usage: obj.pull(cls, buffers, ctx, federation, name, tag, party) and returns: unpickler, unpickler