code: def mpi_available(env=None):
      return _get_mpi_implementation(env) not in {
          _UNKNOWN_IMPL,
          _MISSING_IMPL,
      }
  
file_path: horovod/horovod/runner/mpi_run.py
imports: import copy
  import os
  import sys
  from shlex import quote
  from horovod.runner.common.util import env, hosts, safe_shell_exec, tiny_shell_exec
label_desc: Use image node_id 1 for calling a global function with example usage: mpi_available(env) and returns: unknown