code: def sync_all_params():
      """Sync all tf variables across MPI processes."""
      return sync_params(tf.global_variables())
  
file_path: spinningup/spinup/utils/mpi_tf.py
imports: import numpy
  import tensorflow
  from mpi4py import MPI
  from spinup.utils.mpi_tools import broadcast
label_desc: Use image node_id 4 for calling a global function with example usage: sync_all_params() and returns: sync_params