code: def global_device_count(*args, **kwargs):
      """Return the number of accelerators (GPUs or TPUs) in all hosts."""
      return backend()["global_device_count"](*args, **kwargs)
  
imports: import contextlib
  import enum
  import gin
  from trax.fastmath.jax import JAX_BACKEND
  from trax.fastmath.numpy import NUMPY_BACKEND
  from trax.fastmath.tf import TF_BACKEND
label_desc: Use image node_id 38 for calling a global function with example usage: global_device_count() and returns: backend