a "hello world" python C extension (intermediate - advanced) anthony explains

[@chriskorfmann]

Awesome vid, as usual! There's not much out there on the C-API that is this straightforward. I recently wrote my first C-extension with a lot of frustration (I hated C before starting), but I now have an appreciation for it. I got a ~20% speed-up vs the same function implemented in vanilla Python. I'm curious to see how it stacks up against Cython, but I have no idea how to write .pyx

[@LoucuraMagic]

thank you, that was exactly what i was looking for!

[@POP3O2]

im starting new job as software engineer and they are going to use capi for python 2.7. I find this video so useful. Thanks man! PS. What you like to continue with this topic? ;)

[@anthonywritescode]

whew 2.7 that's rough! glad this was helpful -- there's some other related things to check out if you don't want to write as much C: kzbin.info/www/bejne/jmbMo6uFart2ftk

[@dannymurphy2823]

Like watching your vids. Even thou I am still to grasping the core concepts of python language itself.

[@fernandodiazurbano8815]

This is a nice video, it was a good watch and to the point.

[@anibaldk]

This is, most of the time, more of a hobby/curiosity than an actual need (which is still great so many thanks). However, it's usually best to check out libraries like numpy/scipy/numba/etc before writing your own C extension.

[@anthonywritescode]

this is terrible advice -- numpy does not help you interface with C libraries and is a behemoth of a dependency to pull in

[@anibaldk]

@@anthonywritescode Perhaps I did not explain myself correctly. I meant to say check it's best to check numpy (or other C based libraries) first than trying to implement the same code. I also don't quite follow the hassle of installing numpy. I never had any trouble with it 🤔 Anyway, thanks for the video. I wanted to learn exactly what you demoed so I'm grateful for it 😊

[@tens0r884]

@@anibaldk I think you either dont quiet understand either what numba does or what the c api is for 😂😂

[@DataPastor]

Great video. A Zig version would also be nice.

[@marcello4258]

same for RUST and GO as mentioned please ;)

[@TheNotStated]

Thanks for the video! Why we dont have to call Py_DECREF on name variable?

[@anthonywritescode]

PyArg_ParseTuple I believe gives borrowed references, so unless you're doing something with that object it doesn't need an increment or a decrement

[@mastan419]

Thanks sir

[@nicezombies1]

Does sys.getrefcount(ANY STRING) by default return 3? Because it didn't change after the code rewrite.

[@victordvickie]

Is there any advantage of using C++ over C for this and if so can you make a guide?

[@anthonywritescode]

the python bits have to be `extern "C"` at the least so integrating c++ is kind of tricky. there isn't really much upside other than c++ is a different language than C

[@victordvickie]

@@anthonywritescode thank you

[@angelcaru]

"there isn't really much of an upside other than the downside"​@@anthonywritescode

[@j2d51]

Why we use .c extension to save program

[@anthonywritescode]

the whole point of this video is to demo a C extension

[@Saimon404]

How to decompile .so file?

[@anthonywritescode]

in the general case you cannot -- you can "disassemble" it (to assembly code) -- but getting it back to the original high-level language is impossible

[@Saimon404]

@@anthonywritescode ok bro,but....

[@erjiaxiao6577]

what does 'pip install .' do?

[@anthonywritescode]

it installs the source package at `.` (the current directory)

[@erjiaxiao6577]

@@anthonywritescode thanks a lot! it helps!

[@jccheloven]

Too small font, can't see the code. A pity :-/

[@anthonywritescode]

the code samples are all up on github.com/anthonywritescode/explains I can't really go any larger on font size (it's already extremely large) -- I'd recommend *not* watching on a phone

[@jccheloven]

@@anthonywritescode Awesome, thank you!