code: def synchronize(handle):
      """
      Synchronizes an asynchronous push_pull operation until
      it's completed. Returns the result of the operation.
      Arguments:
          handle: A handle returned by an push_pull asynchronous
                  operation.
      Returns:
          An output tensor of the operation.
      """
      if handle not in _handle_map:
          return
      c_lib.byteps_torch_wait_and_clear(handle)
      _, output = _handle_map.pop(handle)
      return output
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from distutils.version import LooseVersion
  import torch
  from byteps.torch import c_lib
  from byteps.common import BytePSBasics
  from byteps.torch.compression import Compression
label_desc: Use image node_id 14 for calling a global function with example usage: synchronize(handle) and returns: output