> you ran your test script with the -m "run module as script" flag

Right, that was a mistest, so it looks like triple quotes do work.

I did notice that there's also an issue if one line reads, "red='hello'".

But really, the big issue is using a bare-identifier to fiat an attribute into existence.  That's a door that really shouldn't be opened.

Secondarily, the doesn't seem to be any use case that can't be readily covered by the existing classes.  There is no real need for the witchcraft and the departure from Python norms.