Hi Falk, I realize this is a little outdated but since it's been useful to me time and again, perhaps you can make some use of pygmsh [1,2] as well. (It's a thing Python wrapper that generates Gmsh files. Isn't as powerful as raw Gmsh, but arguably easier to use.)
Cheers, Nico [1] https://pypi.python.org/pypi/pygmsh [2] https://github.com/nschloe/pygmsh
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