code: def get_fileobject(self, dir=None, **kwargs):
          '''Return the temporary file to use.'''
          if dir is None:
              dir = os.path.normpath(os.path.dirname(self._path))
          descriptor, name = tempfile.mkstemp(dir=dir)
          # io.open() will take either the descriptor or the name, but we need
          # the name later for commit()/replace_atomic() and couldn't find a way
          # to get the filename from the descriptor.
          os.close(descriptor)
          kwargs['mode'] = self._mode
          kwargs['file'] = name
          return io.open(**kwargsf get_fileobject(self, dir=None, **kwargs):
          '''Return the temporary file to use.'''
          if dir is None:
              dir = os.path.normpath(os.path.dirname(self._path))
          descriptor, name = tempfile.mkstemp(dir=dir)
          # io.open() will take either the descriptor or the name, but we need
          # the name later for commit()/replace_atomic() and couldn't find a way
          # to get the filename from the descriptor.
          os.close(descriptor)
          kwargs['mode'] = self._mode
          kwargs['file'] = name
          return io.open(**kwargs)
docs: Return the temporary file to use.