code: def make_seekable(fileobj):
      
      if sys.version_info < (3, 0) and isinstance(fileobj, file):
          filename = fileobj.name
          fileobj = io.FileIO(fileobj.fileno(), closefd=False)
          fileobj.name = filename
      assert isinstance(fileobj, io.IOBase), \
          "fileobj must be an instance of io.IOBase or a file, got %s" \
          % type(fileobj)
      return fileobj if fileobj.seekable() \
          else ArchiveTemp(fileobj)
docs: If the file-object is not seekable, return  ArchiveTemp of the fileobject,
      otherwise return the file-object itself