python cffi tutorial (intermediate - advanced) anthony explains #155

today I build a sample cffi library, wrapping the `uuid` system module! cffi is a performant alternative to writing error-prone C extensions and performs well with pypy!

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I won't ask for subscriptions / likes / comments in videos but it really helps the channel. If you have any suggestions or things you'd like to see please comment below!

[sadhlife]

this seems easier and better than c extensions from what you've shown, are there any downsides to it?

[ninjaaron]

I always wonder about how this work with C library functions that allocate data with malloc internally.

I _guess_ you wrap it in a class and call the free function in the `__del__` method, but I never see examples dealing with it, though there are a few words about it in the CFFI documentation---words which don't make it totally clear what the optimal way to do this is without manually reasoning about memory lifetimes.

[ekardonsenior]

hi, i am trying to replicate what you did in the video on windows with dll, but i don't have a header file. what should i do?

[ZZDryno]

Where can I find the uuid.h on a Windows machine?

[ZZDryno]

When you set the module name "_uuidcffi" you say that the underscore makes the c module faster. Does that mean that code will actually run faster or will it just compile faster?

[stuartdols]

Great video! I was able to generate a package wrapping my custom DLL to generate a pyd module. I can use the pyd module if I simply copy it (along with the DLL) along side a py module that imports and uses the pyd. However, I can't seem to build a binary wheel to include the pyd module. I do not want to distribute the C code that generates the LIB/DLL/PYD files, just the DLL, headers, and PYD files. Can you do a video that provides this capability? Even a cross-platform method for an "equivalent" shared object would be helpful as well.

[QuantumWithAnna]

None of your examples compile or run, Anthony. It is really cool to see how successful you are but if I cannot do it what good is it to me?

[ragnarlothbrok]

Is it just me or this shit is way too complicated, I find plain ctypes lot more clear