Re: async serial port in Python.
Les Cargill wrote: What I'd like to do is set up *some* sort of method in Python to asynchronously use callbacks to receive characters from a serial port or 20 serial ports. If I have to hook an event loop or even spawn a thread - fine! but it needs to allow for making things event-driven. For lack of a better term, I'd like this to at least have "select()/epoll() semantics". And then I'd like to extend that to TCP and UDP ports. Is this even possible? I keep running into "not done yet" stuff on this front, but I'm not very up on Python. It may be ... what's the term ... ? ... un-Pythonic, and I would accept that as an explanation. And no, I do not have a pet distro or version of Python. Any is fine with me. The Brent Welch book for Tcl has a totally complete example of this laid out in great detail. That's so 15-20 years ago - try to catch up, guys :) Update: Found this: http://pyserial-asyncio.readthedocs.io/en/latest/index.html Seems to work. It's still "experimental"? -- Les Cargill -- https://mail.python.org/mailman/listinfo/python-list
async serial port in Python.
What I'd like to do is set up *some* sort of method in Python to asynchronously use callbacks to receive characters from a serial port or 20 serial ports. If I have to hook an event loop or even spawn a thread - fine! but it needs to allow for making things event-driven. For lack of a better term, I'd like this to at least have "select()/epoll() semantics". And then I'd like to extend that to TCP and UDP ports. Is this even possible? I keep running into "not done yet" stuff on this front, but I'm not very up on Python. It may be ... what's the term ... ? ... un-Pythonic, and I would accept that as an explanation. And no, I do not have a pet distro or version of Python. Any is fine with me. The Brent Welch book for Tcl has a totally complete example of this laid out in great detail. That's so 15-20 years ago - try to catch up, guys :) -- Les Cargill -- https://mail.python.org/mailman/listinfo/python-list
Re: [OT] Python and Excel
oliver wrote: That would be amazing. I still have nightmares of when I had to create this big options analysis VBA program in Excel 2007. Odd - I haven't found VBA itself to be all that horrible. Yeah, it's got some serious weaknesses but it jut hasn't bit me badly, yet. Then again, it's not something I do a lot of. On Mon, Dec 18, 2017, 14:21 MRAB, <pyt...@mrabarnett.plus.com> wrote: Those who use Excel might find this interesting: Microsoft Considers Adding Python as an Official Scripting Language to Excel https://www.bleepingcomputer.com/news/microsoft/microsoft-considers-adding-python-as-an-official-scripting-language-to-excel/ -- https://mail.python.org/mailman/listinfo/python-list -- Les Cargill -- https://mail.python.org/mailman/listinfo/python-list
What is a mechanism equivalent to "trace variable w ..." in Tcl for Python?
A really interesting design approach in Tcl is to install a callback
when a variable is written to. This affords highly event-driven
programming.
Example ( sorry; it's Tcl ) :
namespace eval events {
set preRPM -1
proc handleRPM { args } {
# do stuff to handle an RPM change here
variable ::motor::RPM
variable preRPM
puts "RPM changed from $preRPM to $RPM
set preRPM $RPM
}
}
...
trace variable ::motor::RPM w ::events::handleRPM
...
set ::motor::RPM 33.33
What is an equivalent mechanism in Python?
Thanks in advance.
--
Les Cargill
--
https://mail.python.org/mailman/listinfo/python-list
Re: Is Microsoft Windows secretly downloading childporn to your computer ?!
Juha Nieminen wrote: In comp.lang.c++ Steve Hayes <hayes...@telkomsa.net> wrote: You download things FROM a computer, you upload them TO a computer. It's a matter of perspective. If a hacker breaks into your computer and starts a download from somewhere else into your computer, isn't the hacker "downloading" things to your computer? --- news://freenews.netfront.net/ - complaints: n...@netfront.net --- Down is towards an end node; up is towards the backbone. Servers live closer to the backbone. Usually. Or rather did when the nomenclature was forged. -- Les Cargill -- https://mail.python.org/mailman/listinfo/python-list
