#130 Python interface basics #2

[Ulf Lorenz]

Pybind11 seems to work fine for what we want to do, however, in the original ticket [#117], some things have been left out that should be implemented as prototypes at least. A good target would be the one- or two-dimensional harmonic oscillator demo, done in a somewhat instructive style (not using a harmonic oscillator potential, but building the potential in python). In particular, things that should be done at least as a prototype:

• handle callback functions (for initial wave function creation, potential building etc.)
  • we need true callbacks for later usage (time-dependent laser fields)
• try out unit conversion
• try out class enums
• try out exception handling

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• callback functions are natively supported by pybind. Works out of the box
• unit conversions can be circumvented by having special constant variables in python
• class enums work
• exception handling works as well through automatic wrapping in python exceptions