Python: asyncio.Future

asyncio.Future represents the eventual result of an asynchronous operation.

asyncio.Future is not thread-safe.

asyncio.Future is an awaitable object.

A Future class is similar to the one in PEP 3148 and almost compatible with concurrent.future.Future with the following differences:

• asyncio.Future is not thread safe
• result() and exception() do not take a timeout argument and rase an exception when the future isn't done yet
• Callbacks registered with add_done_callback() are always called via the event loop's call_soon().
• This class is not compatible with the wait() and as_completed() methods of the concurrent.futures package.
• concurrent.futures.Future instances cannot be awaited.
• ‥ and more ‥