text: #
  # Licensed to the Apache Software Foundation (ASF) under one
  # or more contributor license agreements.  See the NOTICE file
  # distributed with this work for additional information
  # regarding copyright ownership.  The ASF licenses this file
  # to you 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 Callable, Dict, List, Optional
  
  from airflow.sensors.base import BaseSensorOperator
  from airflow.utils.operator_helpers import determine_kwargs
  
  
  class PythonSensor(BaseSensorOperator):
      """
      Waits for a Python callable to return True.
  
      User could put input argument in templates_dict
      e.g ``templates_dict = {'start_ds': 1970}``
      and access the argument by calling ``kwargs['templates_dict']['start_ds']``
      in the callable
  
      :param python_callable: A reference to an object that is callable
      :type python_callable: python callable
      :param op_kwargs: a dictionary of keyword arguments that will get unpacked
          in your function
      :type op_kwargs: dict
      :param op_args: a list of positional arguments that will get unpacked when
          calling your callable
      :type op_args: list
      :param templates_dict: a dictionary where the values are templates that
          will get templated by the Airflow engine sometime between
          ``__init__`` and ``execute`` takes place and are made available
          in your callable's context after the template has been applied.
      :type templates_dict: dict of str
      """
  
      template_fields = ('templates_dict', 'op_args', 'op_kwargs')
  
      def __init__(
          self,
          *,
          python_callable: Callable,
          op_args: Optional[List] = None,
          op_kwargs: Optional[Dict] = None,
          templates_dict: Optional[Dict] = None,
          **kwargs,
      ):
          super().__init__(**kwargs)
          self.python_callable = python_callable
          self.op_args = op_args or []
          self.op_kwargs = op_kwargs or {}
          self.templates_dict = templates_dict
  
      def poke(self, context: Dict):
          context.update(self.op_kwargs)
          context['templates_dict'] = self.templates_dict
          self.op_kwargs = determine_kwargs(self.python_callable, self.op_args, context)
  
          self.log.info("Poking callable: %s", str(self.python_callable))
          return_value = self.python_callable(*self.op_args, **self.op_kwargs)
          return bool(return_value)
  