content: #  Copyright (c) ZenML GmbH 2021. All Rights Reserved.
  #  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.
  from typing import Tuple
  
  import pandas as pd
  from typing_extensions import Annotated
  
  from zenml import step
  
  
  @step
  def data_splitter(
      reviews: pd.DataFrame,
  ) -> Tuple[
      Annotated[pd.DataFrame, "reference_dataset"],
      Annotated[pd.DataFrame, "comparison_dataset"],
  ]:
      """Splits the dataset into two subsets, the reference dataset and the
      comparison dataset.
      """
      ref_df = reviews[reviews.Rating > 3].sample(
          n=5000, replace=True, ignore_index=True, random_state=42
      )
      comp_df = reviews[reviews.Rating < 3].sample(
          n=5000, replace=True, ignore_index=True, random_state=42
      )
      return ref_df, comp_df
  