[issue16853] add a Selector to the select module

[STINNER Victor]

STINNER Victor added the comment:

I like the idea of renaming select to _select, and add Lib/select.py
for the high-level wrapper (Selector). In my opinion, adding a module
just for 5 classes is overkill. Selector classes are a very thin
abstraction over the low-level objects. A new module can be justified
for something more evolved, something like an event loop with
callbacks and a scheduler, something like the PEP 3156 (tulip) :-)

This issue is for code written in Python. Is it a similar issue for
code written in C? internal_select_ex() of Modules/socketmodule.c and
check_socket_and_wait_for_timeout() of Modules/_ssl.c uses poll() and
select().

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue16853>
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