content: #  Copyright (c) ZenML GmbH 2023. 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:
  #
  #       https://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.
  """Initialization of the langchain integration."""
  
  from zenml.integrations.constants import LANGCHAIN
  from zenml.integrations.integration import Integration
  
  from zenml.logger import get_logger
  
  logger = get_logger(__name__)
  
  
  class LangchainIntegration(Integration):
      """Definition of langchain integration for ZenML."""
  
      NAME = LANGCHAIN
      REQUIREMENTS = [
          "langchain==0.3.0",
          "langchain-community",
          "pyyaml>=6.0.1",
          "tenacity!=8.4.0",  # https://github.com/jd/tenacity/issues/471
      ]
      REQUIREMENTS_IGNORED_ON_UNINSTALL = ["pyyaml","tenacity"]
  
      @classmethod
      def activate(cls) -> None:
          """Activates the integration."""
          from zenml.integrations.langchain import materializers  # noqa
  
  