py4cl2-cffi can be found at https://github.com/digikar99/py4cl2-cffi

Running Tests

For running the tests, ensure you use python3.8 or recent (by configuring the exported variables in the package py4cl2-cffi/config in the file src/config.lisp and have the following installed on the python side:

• numpy
• networkx
• matplotlib

The system is configured (in package.lisp) to avoid testing the loading of networkx and matplotlib on ECL and ABCL. To overcome this behavior, simply remove :ecl or :abcl from cl:*features* during system-read time.

Once these are loaded, run (asdf:test-system "py4cl2-tests").

Differences with respect to py4cl2-tests

• pythonize: returns a cffi:foreign-pointer and not a string. However, raw-pyeval and raw-pyexec still expect strings. Thus, if pythonize is being used, then one expects to use raw-pyeval with py4cl2 and pyeval with py4cl2-cffi.
• +py-empty-tuple+ and +py-none+: py4cl2-cffi has explicit pointers to empty tuples and the None object as distinct from the empty list as well as the boolean False. py4cl2 conflates these and uses the string "()" and "None" to denote the empty tuple and the None object.
• pyvalue: py4cl2 relies on strings to point to the python objects and thus conflates when strings are being used to denote python objects vs when strings are used as literal objects. py4cl2-cffi uses pyvalue to avoid this conflation.
• Since arrays can be passed by reference, and no "excessive memory for eval-ing the array's string representation" is not required, pickling is no longer necessary.