Re: Defining a Python enum in a C extension - am I doing this right?
On Sat, Jul 24, 2021 at 6:55 AM Dan Stromberg wrote: > > > On Fri, Jul 23, 2021 at 1:20 AM Bartosz Golaszewski wrote: >> >> Hi! >> >> I'm working on a Python C extension and I would like to expose a >> custom enum (as in: a class inheriting from enum.Enum) that would be >> entirely defined in C. > > > I'm probably missing something obvious, but why would you write new code in C > when you can just use Cython? Cython is a lot easier, and quite fast, and > should (eventually?) allow compiling to HPY instead of just "the" C extension > module interface. > > https://news.ycombinator.com/item?id=26627683 > I'm the author and maintainer of libgpiod - the user-space library and tools for using the linux GPIO character device. The core library is written in C but we're also exposing C++ and Python bindings (with more language bindings planned). The python bindings are written as a C extension module and look like this: https://git.kernel.org/pub/scm/libs/libgpiod/libgpiod.git/tree/bindings/python/gpiodmodule.c. We're in the process of writing the (backward incompatible) version 2 of the library in order to support the new kernel features and the C API has changed a lot so we're also rewriting the bindings. Among others: all bitwise flags have now been converted to enums, hence my question. In C++ we'll use scoped enum classes and I'd like to do a similar thing in python. What I'm doing is not aimed at using C for speed but for calling the C APIs. I know I could use SWIG but in order to make the interface elegant, it would have to be packaged in proper Python classes anyway, creating another layer of code so I prefer to just use C. Bart -- https://mail.python.org/mailman/listinfo/python-list
a simple question
I recently downloaded the latest version of python, 3.9.6. Everything works except, the turtle module. I get an error message every time , I use basic commands like forward, backward, right and left. My syntax is correct: pat.forward(100) is an example. Can you tell me what is wrong. thanks, glenn -- https://mail.python.org/mailman/listinfo/python-list
Re: a simple question
It would help to know the error message you get every time. On Mon, 2021-07-26 at 22:19 +, Glenn Wilson via Python-list wrote: > I recently downloaded the latest version of python, 3.9.6. Everything > works except, the turtle module. I get an error message every time , > I use basic commands like forward, backward, right and left. My > syntax is correct: pat.forward(100) is an example. Can you tell me > what is wrong. > thanks, glenn -- https://mail.python.org/mailman/listinfo/python-list
Re: a simple question
On 27/07/2021 10.19, Glenn Wilson via Python-list wrote: > I recently downloaded the latest version of python, 3.9.6. Everything works > except, the turtle module. I get an error message every time , I use basic > commands like forward, backward, right and left. My syntax is correct: > pat.forward(100) is an example. Can you tell me what is wrong. Python comes with "batteries included". However, if 'everything' was made immediately-available, each of your program[me]s would be very long. Accordingly, the 'batteries' are kept in what is called "The Python Standard Library". To use a library it must be import-ed into your code. Docs describing the library are available on-line, specifically the turtle module (and some examples of its use) can be found at: https://docs.python.org/3/library/turtle.html Have fun! -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list
RE: a simple question
In addition to the other requests for more info on a very ambiguous question, let me add one. Did the message suggest something worked on an earlier version and broke with a new version, or did they mean they just started USING the current version and hoped the version number was meaningful for the way they probably did not write proper code in the first place that loads the module(s) they need? -Original Message- From: Python-list On Behalf Of Dennis Lee Bieber Sent: Monday, July 26, 2021 9:46 PM To: [email protected] Subject: Re: a simple question On Mon, 26 Jul 2021 22:19:58 + (UTC), Glenn Wilson via Python-list declaimed the following: >I recently downloaded the latest version of python, 3.9.6. Everything works except, the turtle module. I get an error message every time , I use basic commands like forward, backward, right and left. My syntax is correct: pat.forward(100) is an example. Can you tell me what is wrong. No we can't. Please provide a cut&paste (NOT a screen-grab image) of the error traceback, an indication of what OS/hardware you are running upon, etc. Maybe even which installer you downloaded (python.org, or some third-party repackager: ActiveState, Anaconda, M$ app store) -- Wulfraed Dennis Lee Bieber AF6VN [email protected]://wlfraed.microdiversity.freeddns.org/ -- https://mail.python.org/mailman/listinfo/python-list -- https://mail.python.org/mailman/listinfo/python-list
