code: def broadcast(data: _T, root: int) -> _T:
      """Broadcast object from one node to all other nodes.
  
      Parameters
      ----------
      data : any type that can be pickled
          Input data, if current rank does not equal root, this can be None
      root : int
          Rank of the node to broadcast data from.
  
      Returns
      -------
      object : int
          the result of broadcast.
      """
      rank = get_rank()
      length = ctypes.c_ulong()
      if root == rank:
          assert (
              data is not None
          ), "need to pass in data when broadcasting"
          s = pickle.dumps(data, protocol=pickle.HIGHEST_PROTOCOL)
          length.value = len(s)
      # run first broadcast
      _check_call(
          _LIB.XGCommunicatorBroadcast(
              ctypes.byref(length), ctypes.sizeof(ctypes.c_ulong), root
          )
      )
      if root != rank:
          dptr = (ctypes.c_char * length.value)()
          # run second
          _check_call(
              _LIB.XGCommunicatorBroadcast(
                  ctypes.cast(dptr, ctypes.c_void_p), length.value, root
              )
          )
          data = pickle.loads(dptr.raw)
          del dptr
      else:
          _check_call(
              _LIB.XGCommunicatorBroadcast(
                  ctypes.cast(ctypes.c_char_p(s), ctypes.c_void_p),
                  length.value,
                  root,
              )
          )
          del s
      return data
  
imports: import ctypes
  import json
  import logging
  import os
  import pickle
  from enum import IntEnum, unique
  from typing import Any, Dict, List, Optional
  import numpy
  from ._typing import _T
  from .core import _LIB, _check_call, build_info, c_str, from_pystr_to_cstr, py_str
label_desc: Use image node_id 8 for calling a global function with example usage: broadcast(data, root) and returns: data