Is this pythonic?

[Chris Angelico]

On Thu, Nov 24, 2016 at 9:59 PM, Marko Rauhamaa <marko at pacujo.net> wrote:
> Chris Angelico <rosuav at gmail.com>:
>
>> On Thu, Nov 24, 2016 at 7:39 PM, Marko Rauhamaa <marko at pacujo.net> wrote:
>>>  * Coroutines can be killed, threads cannot.
>>
>> Not strictly true. A coroutine can be abandoned at an await point, but
>> the currently-executed call is still going to complete (usually);
>
> I don't quite understand. Say you are awaiting on receiving bytes from a
> socket. That means there has been a nonblocking call to read(2),
> recvmsg(2) or equivalent that has returned EAGAIN. If you now abandon
> the coroutine, there is no resumption of the system call but the
> coroutine can finish instantaneously.

Is the read(2) still going to consume data from the pipe/socket? If
so, the operation is still going to continue, whether you use
coroutines or threads. If not, it would have been cancelled whether
you use coroutines or threads.

ChrisA