code: def _backport_for_mobile_to_buffer(f_input, to_version):
      r"""Take a string containing a file name (file-like object).
  
      Args:
          f_input: a file-like object (has to implement read, readline, tell, and seek),
              or a string containing a file name
  
      """
      if isinstance(f_input, (str, os.PathLike)):
          if not os.path.exists(f_input):
              raise ValueError(
                  f"The provided filename {f_input} does not exist"
              )
          if os.path.isdir(f_input):
              raise ValueError(
                  f"The provided filename {f_input} is a directory"
              )
  
      if isinstance(f_input, (str, os.PathLike)):
          return torch._C._backport_for_mobile_to_buffer(
              os.fspath(f_input), to_version
          )
      else:
          return torch._C._backport_for_mobile_from_buffer_to_buffer(
              f_input.read(), to_version
          )
  
file_path: pytorch/torch/jit/mobile/__init__.py
imports: import os
  import torch
  from torch.jit._serialization import validate_map_location
label_desc: Use image node_id 6 for calling a global function with example usage: _backport_for_mobile_to_buffer(f_input, to_version) and returns: torch, torch