condition.py 文件源码

def loads(conditions_string):
  """ Deserializes the conditions property into its corresponding
  components: the condition_structure and the condition_list.

  Args:
    conditions_string: String defining valid and/or conditions.

  Returns:
    A tuple of (condition_structure, condition_list).
    condition_structure: nested list of operators and placeholders for operands.
    condition_list: list of conditions whose index correspond to the values of the placeholders.
  """
  decoder = ConditionDecoder(_audience_condition_deserializer)

  # Create a custom JSONDecoder using the ConditionDecoder's object_hook method
  # to create the condition_structure as well as populate the condition_list
  json_decoder = json.JSONDecoder(object_hook=decoder.object_hook)

  # Perform the decoding
  condition_structure = json_decoder.decode(conditions_string)
  condition_list = decoder.condition_list

  return (condition_structure, condition_list)