Python bindings for pre-/post-processing

[agrayver]

@dealii

I have decided to turn this into a meta-issue that will track my efforts towards a better python support in deal.II.

• Add support for faces and boundary ids (fixed by Extend cell python wrappers and add face wrappers #9023).
• Enable indentation for python bindings (fixed by Make indent script work for python bindings #9028).
• Add interface for mapping objects (see Add python wrappers for MappingQGeneric #9055).
• Enable working with manifolds (see Add python wrappers for manifolds and extend tria wrappers #9109 Add python interface for FunctionManifold #9179)
• Extend GridTools support (see Add a series of new python wrappers #9148 Add a set of new python wrappers #9178 Add python bind for compute_aspect_ratio_of_cells #9429 Add more python bindings #9510)
• Add bindings for Quadrature (see Add python wrappers for Quadrature #9428)
• Implement tutorial programs (candidates: step-49, step-53) in python (see Add python version of step-49 #9526 Add Python version of step-53 #9777)
• Avoid duplication of the docs by using copydoc (see Use copydoc for Python wrappers #9668 )

If anyone has something to add, feel free.

[agrayver]

@Rombur I see you already implemented merge/shift -- do you see any caveats for other functions?

[Rombur]

Being able to do step-49 in python would be really great! I think that it should be straight forward. You should be able to follow the recipe used for the functions that have already been ported but let me know if you encounter any problem.

[agrayver]

I would like to consult regarding the nature and place of the new python tutorials (step-49, step-53 initially). They will replicate the functionality of the original programs, using the python bindings and will be presented using the python notebooks.

Should they be placed next to the C++ programs, in the corresponding folders?

@Rombur @masterleinad ping

[Rombur]

I think they should go with the other python notebooks in contrib/python-bindings/notebooks and I would add a section in the C++ tutorials that links to the python notebooks.