class_docstr: Abstract base class for wait strategies.
class_docstr_tok: ["Abstract","base","class","for","wait","strategies","."]
code: def __call__(self, retry_state: "RetryCallState") -> float:
      pass
  
imports: import abc
  import random
  import typing
  from tenacity import _utils
label_desc: Use image node_id 1 for calling the wait_base obj's underlying member method code with example usage: obj.__call__(retry_state) without return types