The stdlib open() has an option to control the buffering.

One can disable buffering with buffering=0, and avoid doing flush() calls. This is different from doing os.fsync().

In aiofile, there is fsync() method, but I don't see any flush (the flush method just calls fsync) or unbuffered mode.

Is there a way to achieve without fsync? If not, then such method and mode should be added for greater compatibility.