old_contents: #
  # Copyright 2016 The BigDL Authors.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  #
  import warnings
  
  try:
      from .autotsestimator import AutoTSEstimator
  except ImportError:
      warnings.warn("Please install `bigdl-nano[all]` to use AutoTSEstimator")
  from .tspipeline import TSPipeline
  
new_contents: #
  # Copyright 2016 The BigDL Authors.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  #
  import warnings
  from bigdl.nano.utils.log4Error import invalidInputError
  import os
  
  
  if os.getenv("LD_PRELOAD", "null") != "null":
      invalidInputError(False,
                        errMsg="Users of `bigdl.chronos.autots` should "
                               "unset bigdl-nano environment variables!",
                        fixMsg="Please run `source bigdl-nano-unset-env` "
                               "in your bash terminal")
  
  try:
      # TODO: make this a LazyImport
      from .autotsestimator import AutoTSEstimator
      from .tspipeline import TSPipeline
  except ImportError:
      pass
  
subject: add autots import check (#5384)