Fusion 9 Studio startup Python script

I'd like to run some Python code directly when Fusion launches. In the scripting guide I found you can save a .scriptlib file with some custom Lua code to run at Fusion launch. This gets triggered nicely.

For example I can put in:

Code: Select all

print "a"

And the console will have the "a" printed directly after launch, but trying to Execute Python code raises errors. For example:

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Execute("!Py: print 'a'")

This will actually execute the code (and seemingly run fine) but Fusion will spam me two huge error popups that state: "1: attempt to call global 'Execute' (a nil value)"

Though, magically this works without errors:

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while composition == nil do
-- wait around until fusion is running
-- this is to avoid error pop-up: attempt to call global 'Execute' (a nil value)"
end
Execute("!Py: print 'a'")


But that doesn't look like the way it should be done and it looks a bit hacky.
In my case I'm looking for the easiest way to run Python code at Fusion launch - is this it?