class_docstr: Represents the result of an asynchronous computation.
class_docstr_tok: ["Represents","the","result","of","an","asynchronous","computation","."]
code: def _invoke_callbacks(self):
      for callback in self._done_callbacks:
          try:
              callback(self)
          except Exception:
              LOGGER.exception(
                  "exception calling callback for %r", self
              )
  
imports: import collections
  import logging
  import threading
  import time
  import types
label_desc: Use image node_id 2 for calling the Future obj's underlying member method code with example usage: obj._invoke_callbacks() without return types