class_docstr: A slot storing a truth value.
class_docstr_tok: ["A","slot","storing","a","truth","value","."]
code: def _as_feature(self) -> List[float]:
      try:
          if self.value is not None:
              return [1.0, float(bool_from_any(self.value))]
          else:
              return [0.0, 0.0]
      except (TypeError, ValueError):
          # we couldn't convert the value to float - using default value
          return [0.0, 0.0]
  
imports: import logging
  from abc import ABC, abstractmethod
  from typing import Any, Dict, List, Optional, Text, Type
  import rasa.shared.core.constants
  from rasa.shared.exceptions import RasaException
  import rasa.shared.utils.common
  import rasa.shared.utils.io
  from rasa.shared.constants import DOCS_URL_SLOTS
label_desc: Use image node_id 1 for calling the BooleanSlot obj's underlying member method code with example usage: obj._as_feature() and returns: list, list, list