code: def __exit__(self, typ, value, traceback):
      if self.is_local:
          setattr(self.config, self.name, self.old_value)
      else:
          delattr(self.config, self.name)
  
imports: import sys
  import threading
  import typing
  from chainer import types
label_desc: Use image node_id 3 for calling the _ConfigContext obj's underlying member method code with example usage: obj.__exit__(typ, value, traceback) without return types