class_docstr: Abstract base class for retry strategies.
class_docstr_tok: ["Abstract","base","class","for","retry","strategies","."]
code: def __call__(self, retry_state):
      pass
  
imports: import abc
  import re
  import six
label_desc: Use image node_id 1 for calling the retry_base obj's underlying member method code with example usage: obj.__call__(retry_state) without return types