[Python-Dev] PEP 3003 - Python Language Moratorium (original) (raw)

Stefan Behnel stefan_ml at behnel.de
Thu Nov 5 21:41:07 CET 2009

Dino Viehland, 05.11.2009 19:35:

Stefan wrote:

It /does/ make some static assumptions in that it considers builtins true builtins. However, it does not prevent you from replacing them in your code, as long as you do it inside the module. Certainly a restriction compared to Python, where you can import a module into a changed dict environment that redefines 'object', but not a major restriction IMO, and certainly not one that impacts much code. To me this is a deal breaker which prevents Cython from being a Python implementation. From a talk given by Colin Winter at the LLVM dev meeting (http://llvm.org/devmtg/2009-10/) it seems like Unladen Swallow wanted to do something like this as well and Guido said no. In this case the breaking change is so subtle that I'd personally hate to run into something like this porting code to Cython and having to figure out why it's not working.

I assume that this is artificially exaggerated to make a point, as this behaviour is obviously not a technical requirement but an optimisation, which could potentially be disabled.

Stefan

More information about the Python-Dev mailing list