
STINNER Victor added the comment: "But that isn't quite true. It is the callback associated with the future that is displaying the result and stopping the loop." I wrote this example to show that setting the result of a future can schedule a callback. I mean something like: "In this example, the future is used to link slow_operation() to got_result(): when slow_operation() is done, got_result() is called with the result." The main idea behind Future is to chain callbacks and the link is done externally. It's different from this design: def slow_operation(done_callback): ... done_callback() ---------- _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue22473> _______________________________________