text: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  # -----------------------------------------------------------------------------
  # (C) British Crown Copyright 2017-2019 Met Office.
  # All rights reserved.
  #
  # Redistribution and use in source and binary forms, with or without
  # modification, are permitted provided that the following conditions are met:
  #
  # * Redistributions of source code must retain the above copyright notice, this
  #   list of conditions and the following disclaimer.
  #
  # * Redistributions in binary form must reproduce the above copyright notice,
  #   this list of conditions and the following disclaimer in the documentation
  #   and/or other materials provided with the distribution.
  #
  # * Neither the name of the copyright holder nor the names of its
  #   contributors may be used to endorse or promote products derived from
  #   this software without specific prior written permission.
  #
  # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  # ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  # LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  # POSSIBILITY OF SUCH DAMAGE.
  """Script to run time-lagged ensembles."""
  
  from improver import cli
  
  
  @cli.clizefy
  @cli.with_output
  def process(*cubes: cli.inputcube):
      """Module to time-lag ensembles.
  
      Combines the realization from different forecast cycles into one cube.
      Takes an input CubeList containing forecasts from different cycles and
      merges them into a single cube.
  
      Args:
          cubes (list of iris.cube.Cube):
              List of individual ensemble cubes
  
      Returns:
          iris.cube.Cube:
              Merged cube
  
      Raises:
          ValueError: If ensembles have mismatched validity times
      """
      import warnings
      from improver.utilities.time_lagging import GenerateTimeLaggedEnsemble
  
      if len(cubes) == 1:
          warnings.warn('Only a single cube input, so time lagging will have '
                        'no effect.')
          return cubes[0]
  
      # raise error if validity times are not all equal
      time_coords = [cube.coord("time") for cube in cubes]
      time_coords_match = [coord == time_coords[0] for coord in time_coords]
      if not all(time_coords_match):
          raise ValueError(
              "Cubes with mismatched validity times are not compatible.")
  
      return GenerateTimeLaggedEnsemble().process(cubes)
  