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Groups > comp.lang.python > #66267
| From | Grant Edwards <invalid@invalid.invalid> |
|---|---|
| Newsgroups | comp.lang.python |
| Subject | Re: singleton ... again |
| Date | 2014-02-13 22:28 +0000 |
| Organization | PANIX Public Access Internet and UNIX, NYC |
| Message-ID | <ldjgtk$kgt$1@reader1.panix.com> (permalink) |
| References | (6 earlier) <ldibhu$2g5$1@ger.gmane.org> <mailman.6850.1392313443.18130.python-list@python.org> <roy-640027.12574313022014@news.panix.com> <mailman.6852.1392317509.18130.python-list@python.org> <roy-BA9C8D.14031413022014@news.panix.com> |
On 2014-02-13, Roy Smith <roy@panix.com> wrote:
> I envision SerialPort being a thin layer on top of a bunch of
> OS-specific system calls to give them a pythonic interface.
Yep, that's pretty much what pyserial is
http://pyserial.sourceforge.net/
> Things like is_shutdown() and set_bit_rate() presumably turn into
> ioctls. No need to have any state at all beyond a file descriptor.
There are OS-dependent things that it's handy to cache in the object
(e.g. a Posix port's current termios settings). It can eliminate a
lot of ioctl() calls if the app spends a lot of time doing things like
messing with modem control lines. The savings in ioctl() calls may
not be worth worrying about, but it's actually simpler/easier to write
that way.
OTOH, caching the termios settings it can cause breakage if two
different processes or port objects are messing with the configuration
of a single port. People who do that are just begging for breakage
anyway, so they get no sympathy from me...
--
Grant Edwards grant.b.edwards Yow! I smell a RANCID
at CORN DOG!
gmail.com
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singleton ... again Asaf Las <roegltd@gmail.com> - 2014-02-11 20:34 -0800
Re: singleton ... again Asaf Las <roegltd@gmail.com> - 2014-02-11 21:15 -0800
Re:singleton ... again Dave Angel <davea@davea.name> - 2014-02-12 00:48 -0500
Re: singleton ... again Roy Smith <roy@panix.com> - 2014-02-12 00:55 -0500
Re: singleton ... again Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2014-02-12 23:04 +1300
Re: singleton ... again Ben Finney <ben+python@benfinney.id.au> - 2014-02-12 21:09 +1100
Re: singleton ... again Roy Smith <roy@panix.com> - 2014-02-12 08:40 -0500
Re: singleton ... again Piet van Oostrum <piet@vanoostrum.org> - 2014-02-13 10:00 +0100
Re: singleton ... again Ned Batchelder <ned@nedbatchelder.com> - 2014-02-13 06:50 -0500
Re: singleton ... again Chris Angelico <rosuav@gmail.com> - 2014-02-13 22:57 +1100
Re: singleton ... again Roy Smith <roy@panix.com> - 2014-02-13 10:24 -0500
Re: singleton ... again Chris Angelico <rosuav@gmail.com> - 2014-02-14 07:03 +1100
Re: singleton ... again Robert Kern <robert.kern@gmail.com> - 2014-02-13 21:13 +0000
Re: singleton ... again Chris Angelico <rosuav@gmail.com> - 2014-02-14 08:27 +1100
Re: singleton ... again Ethan Furman <ethan@stoneleaf.us> - 2014-02-13 08:57 -0800
Re: singleton ... again Roy Smith <roy@panix.com> - 2014-02-13 12:57 -0500
Re: singleton ... again Ethan Furman <ethan@stoneleaf.us> - 2014-02-13 10:31 -0800
Re: singleton ... again Roy Smith <roy@panix.com> - 2014-02-13 14:03 -0500
Re: singleton ... again Chris Angelico <rosuav@gmail.com> - 2014-02-14 06:50 +1100
Re: singleton ... again Grant Edwards <invalid@invalid.invalid> - 2014-02-13 22:28 +0000
Re: singleton ... again Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2014-02-14 18:21 +1300
Re: singleton ... again Tim Delaney <timothy.c.delaney@gmail.com> - 2014-02-14 06:16 +1100
Re: singleton ... again Steven D'Aprano <steve@pearwood.info> - 2014-02-13 02:58 +0000
Re: singleton ... again Ben Finney <ben+python@benfinney.id.au> - 2014-02-13 14:07 +1100
Re: singleton ... again Steven D'Aprano <steve@pearwood.info> - 2014-02-13 04:24 +0000
Re: singleton ... again Chris Angelico <rosuav@gmail.com> - 2014-02-13 15:33 +1100
Re: singleton ... again Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2014-02-14 18:15 +1300
Re: singleton ... again Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2014-02-14 18:06 +1300
Re: singleton ... again Asaf Las <roegltd@gmail.com> - 2014-02-12 09:50 -0800
Re: singleton ... again Asaf Las <roegltd@gmail.com> - 2014-02-12 09:56 -0800
Re: singleton ... again Asaf Las <roegltd@gmail.com> - 2014-02-12 09:58 -0800
Re: singleton ... again Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2014-02-13 10:57 +1300
Re: singleton ... again Asaf Las <roegltd@gmail.com> - 2014-02-12 17:38 -0800
Re: singleton ... again Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-02-12 18:57 +0000
Re: singleton ... again Asaf Las <roegltd@gmail.com> - 2014-02-12 17:02 -0800
Re: singleton ... again Ned Batchelder <ned@nedbatchelder.com> - 2014-02-12 16:34 -0500
Re: singleton ... again Asaf Las <roegltd@gmail.com> - 2014-02-12 17:34 -0800
Re: singleton ... again Tim Delaney <timothy.c.delaney@gmail.com> - 2014-02-13 10:08 +1100
Re: singleton ... again Roy Smith <roy@panix.com> - 2014-02-12 20:57 -0500
Re: singleton ... again Michael Torrie <torriem@gmail.com> - 2014-02-12 15:05 -0700
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