code: def _get_model_bytecode_version(f_input) -> int:
      r"""Take a file-like object to return an integer.
  
      Args:
          f_input: a file-like object (has to implement read, readline, tell, and seek),
              or a string containing a file name
  
      Returns:
          version: An integer. If the integer is -1, the version is invalid. A warning
              will show in the log.
  
      Example:
      .. testcode::
  
          from torch.jit.mobile import _get_model_bytecode_version
  
          # Get bytecode version from a saved file path
          version = _get_model_bytecode_version("path/to/model.ptl")
  
      """
      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._get_model_bytecode_version(
              os.fspath(f_input)
          )
      else:
          return torch._C._get_model_bytecode_version_from_buffer(
              f_input.read()
          )
  
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 3 for calling a global function with example usage: _get_model_bytecode_version(f_input) and returns: torch, torch