Complete working version of cython Queue example?

I've spent several days trying to get this example [1] working, using
Python3.11 and Cython 3.0.11 of Debian.

I've copied the example files as carefully as I can, renamed some to
avoid a name clash with the queue.py library, but the Pure Python
version throws errors at compile time and although the Cython version
compiles, it doesn't work.

Before giving details, just checking first if anyone can simply point
to a set of files, preferably Pure Python but failing that Cython,
that actually work for them.

Thanks,

ht
--
       Henry S. Thompson, School of Informatics, University of Edinburgh
                10 Crichton Street, Edinburgh EH8 9AB, SCOTLAND
                           e-mail: ht@inf.ed.ac.uk
                      URL: https://www.ltg.ed.ac.uk/~ht/
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