code: def build_trace_id():
      timestamp = int(time.time())
      timestamp_str = str(timestamp)
      return timestamp_str + "_" + str(np.random.randint(10000))
  
imports: import json
  import time
  from enum import Enum
  from logging import getLogger
  from typing import Dict, List, Any
  import grpc
  import numpy
  from fate.arch.federation.backends.osx import osx_pb2
  from fate.arch.federation.backends.osx.osx_pb2_grpc import PrivateTransferTransportStub
label_desc: Use image node_id 1 for calling a global function with example usage: build_trace_id() and returns: unknown