class_docstr: Abstract policy.
class_docstr_tok: ["Abstract","policy","."]
docstr: Evaluate a policy.
  
  Returns:
      Distribution of actions
docstr_tok: ["Evaluate","a","policy",".","Returns",":","Distribution","of","actions"]
code: def __call__(self, state):
      """Evaluate a policy.
  
      Returns:
          Distribution of actions
      """
      raise NotImplementedError()
  
imports: from abc import ABCMeta
  from abc import abstractmethod
  from logging import getLogger
label_desc: Use image node_id 1 for calling the Policy obj's underlying member method code with example usage: obj.__call__(state) without return types