Implement a Py-method in C++: A full example

In case you want to extend or speed up Python with C++

Directory structure and files for build C++ inside Python:

py_work_dir/
├─ pyproject.toml
├─ setup.py
├─ src/
│    └─ ql_package/
│          ├── __init__.py
│          ├── ql_std.cpp
│          └── ql_std_jit.py

package [ql_package]:

• defined in pyproject.toml & is sub-dir of dir(src)
• contains module [ql_std_jit]

module [ql_std_cpp]:

• defined in setup.py & in ql_std.cpp
• treated as built-in module

Build (C++) and install

1. build in dir(cpp_work_dir) where pyproject.toml is located:

py -m build

If build does not work, try installing the latest version of build:

pip install --upgrade build

2. install a local package

pip install .\dist\ql_package-0.0.1.tar.gz

Testing:

Download dir and files
Build & install
Run by typing command:

py cpp-vs-numpy.py

Note:

For python.h, see Extending Python with C or C++