Unsynced file handle release in request.get()

[kelson42]

I deal with files I have downloaded just after having downlaoded them. It seems that the created file write handle is not released at the time the callback is called by request.get(). For this reason, an other process can not have a write handle on the file and this generates an error. On fast system, it works pretty well, but systems with a slower I/O, this is a problem. Would that be possible to release the file handle before calling the get() callback?