text: import torch
  
  
  def is_available():
      return hasattr(torch._C, "_c10d_init")
  
  
  if is_available() and not torch._C._c10d_init():
      raise RuntimeError("Failed to initialize PyTorch distributed support")
  
  
  if is_available():
      from .distributed_c10d import *  # noqa: F401
      # Variables prefixed with underscore are not auto imported
      # See the comment in `distributed_c10d.py` above `_backend` on why we expose
      # this.
      from .distributed_c10d import _backend  # noqa: F401
  