code: def _identify_module(file, main=None):
      """identify the name of the module stored in the given file-type object"""
      from pickletools import genops
  
      UNICODE = {"UNICODE", "BINUNICODE", "SHORT_BINUNICODE"}
      found_import = False
      try:
          for opcode, arg, pos in genops(file.peek(256)):
              if not found_import:
                  if opcode.name in (
                      "GLOBAL",
                      "SHORT_BINUNICODE",
                  ) and arg.endswith("_import_module"):
                      found_import = True
              else:
                  if opcode.name in UNICODE:
                      return arg
          else:
              raise UnpicklingError(
                  "reached STOP without finding main module"
              )
      except (NotImplementedError, ValueError) as error:
          # ValueError occours when the end of the chunk is reached (without a STOP).
          if (
              isinstance(error, NotImplementedError)
              and main is not None
          ):
              # file is not peekable, but we have main.
              return None
          raise UnpicklingError(
              "unable to identify main module"
          ) from error
  
imports: import re
  import os
  import sys
  import warnings
  from dill import _dill, Pickler, Unpickler
  from ._dill import BuiltinMethodType, FunctionType, MethodType, ModuleType, TypeType, _import_module, _is_builtin_module, _is_imported_module, _main_module, _reverse_typemap, __builtin__
  from typing import Optional, Union
  import pathlib
  import tempfile
label_desc: Use image node_id 8 for calling a global function with example usage: _identify_module(file, main) and returns: None, arg