I'm writing a script which is supposed to convert the alpha channel of
a layer into a selection, and then stroke that selection with various
paint tools. Easy to do through the GUI, but its turning out to be
rather hard to script.

The best I've been able to do so far was convert the selection into a
path, get the path points, and use them for input into gimp_smudge,
gimp_convolve, etc. Unfortunately, this a) produces somewhat different
results and b) sometimes causes python-fu to segfault.

What I'd really like to do is choose the active tool and then call
gimp_edit_stroke to stroke it over the selection.

So my question is this: how can I choose the active tool from a script?

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