It is not always obvious how the C++ and Python layers interact. Therefore, we give some handy code in Python notebooks that can be copy/pasted to perform some useful operations. They rely mostly on ...

C code that doesn’t call into the CPython runtime isn’t constrained by the GIL. With 3.13t, conventional Python programs can now enjoy the same freedom. Cython 3.1 adds basic support for 3.13t .