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July 2022

4 participants
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Welcome David Woods as a Cython core developer
by Stefan Behnel July 31, 2022

July 31, 2022

Hi everyone, with the release of the first 3.0 alpha that supports Python 3.11 (aptly named "alpha 11"), I'm happy to announce that David Woods has been promoted to a Cython core developer. David has shown an extraordinary commitment and dedication over the last years. His first merged commits were already back in 2015, mostly related to the C++ support. But within the last two years, he voluntarily took over more and more responsibility for bugs and issues and developed several major new features for the project. This includes the Walrus operator (PEP 572), cdef dataclasses (modelled after PEP 557), internal "std::move()" usage in C++ mode or support for Unicode identifiers and module names, all of which form a major part of the 3.0 feature set. David has more than deserved a place in the circle of present and prior core devs. David, thank you for your impressive work on Cython, and welcome to the core team! Stefan

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Nested prange loops - (was: [cython-users] Converting to Python objects with nogil (inside prange for loop))
by Stefan Behnel July 18, 2022

July 18, 2022

Hi, nested prange loops seem to be a common gotcha for users. I can't say if there is ever a reason to do this, but at least I can't think of any. For me, this sounds like we should turn it into a compile time error – unless someone can think of a use case? Even in that case, I'd still emit a warning since it seems so unlikely to be intended. Please reply to the cython-users list to facilitate user feedback. Stefan -------- Forwarded Message -------- Subject: Re: [cython-users] Converting to Python objects with nogil (inside prange for loop) Date: Fri, 15 Jul 2022 07:43:26 +0100 > with nogil, parallel(): > for i in prange(N): > for j in prange(km.BatchSize): You usually only want one loop in a set of nested loops to be prange. Typically the outer loop, but in this case it might be easier to parallelize the inner loop.

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