What does FreeCAD use to embedded Python to C++

[haonk]

Hi!
i am new in Python and C++, i wanna improving FreeCAD source code. But i do not know how did it embedded Python into C++.
I am searching in Google and find something: pybind11, CPython and Boost.Python. So, what does we use for FreeCAD? i wanna know to learning, please help me!

[wmayer]

Hi!
i am new in Python and C++, i wanna improving FreeCAD source code. But i do not know how did it embedded Python into C++.
I am searching in Google and find something: pybind11, CPython and Boost.Python. So, what does we use for FreeCAD? i wanna know to learning, please help me!

We use several Python binding libraries. boost.python or alternatively pybind11 is used for the flatmesh and area modules. But for the vast majority we use our own wrapper. For a class to be wrapped an XML file must be provided and an *Imp.cpp file where the C++ <-> Python stuff is done. The framework is very close to how it's described in the section of embedding in the Python documentation.

[haonk]

We use several Python binding libraries. boost.python or alternatively pybind11 is used for the flatmesh and area modules. But for the vast majority we use our own wrapper. For a class to be wrapped an XML file must be provided and an *Imp.cpp file where the C++ <-> Python stuff is done. The framework is very close to how it's described in the section of embedding in the Python documentation.

And how about GUI? what does we use for FreeCAD? i see PySide, PyQt in FreeCAD project
Where should i start?

[wmayer]

And how about GUI? what does we use for FreeCAD?

The above mentioned libraries are used to write your own Python wrappers for C++ classes while PySide is an already 3rd party wrapper for Qt which we can use as is.

[haonk]

The above mentioned libraries are used to write your own Python wrappers for C++ classes while PySide is an already 3rd party wrapper for Qt which we can use as is.

Thanks!!! but i have an question!
Just like Arch or Draft workbenches, Can I using only Python to create a new module? or i have to use both if i want a perfectly module?.
I didn't know about C++

[chrisb]

You may have a look at the several addon workbenches to see how they build the GUI and interface with FreeCAD structures.