This is a good plan, however what do you do with a function that has a bug? I would be very loathe to do that kind of run-time evaluation of potentially tainted code in production.

Better (and safer!) is to have everything there at compile-time, using import (as I said above).

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We are the carpenters and bricklayers of the Information Age.

Don't go borrowing trouble. For programmers, this means Worry only about what you need to implement.