class_docstr: Constant backoff upon failure
class_docstr_tok: ["Constant","backoff","upon","failure"]
docstr: `backoff`: backoff time in seconds
docstr_tok: ["`","backoff","`",":","backoff","time","in","seconds"]
code: def __init__(self, backoff):
      """`backoff`: backoff time in seconds"""
      self._backoff = backoff
  
imports: import random
  from abc import ABC, abstractmethod
label_desc: Use image node_id 1 to create a new ConstantBackoff object from inherited base classes: AbstractBackoff with example: obj = ConstantBackoff(backoff)