class_docstr: A static class to manage the global secret cache.
docstr: Try to get the value associated with the key from the cache.
  
  :return: The saved value (which can be None) if present in cache and not expired,
      a NotPresent exception otherwise.
docstr_tok: ["Try","to","get","the","value","associated","with","the","key","from","the","cache",".",":","return",":","The","saved","value","(","which","can","be","None",")","if","present","in","cache","and","not","expired",",","a","NotPresent","exception","otherwise","."]
code: def get_variable(cls, key: str) -> str | None:
      """
      Try to get the value associated with the key from the cache.
  
      :return: The saved value (which can be None) if present in cache and not expired,
          a NotPresent exception otherwise.
      """
      return cls._get(key, cls._VARIABLE_PREFIX)
  
file_path: airflow/airflow/secrets/cache.py
imports: from __future__ import annotations
  import datetime
  import multiprocessing
  from airflow.configuration import conf
label_desc: Use image node_id 3 for calling the SecretCache obj's underlying member method code with example usage: obj.get_variable(cls, key) and returns: cls