adding import in pl/python function

Hi,
I'm wondering if it would be OK to change the procedure code before
execution. I'm thinking about adding magically an import at the beginning
of a function.

Currently numeric arguments passed to the procedure are converted into
floats. This is not good, as it causes loss of information.

The proposed solution in code comment is "maybe use a string?".

I'm thinking about something else. We could convert it into Decimal (
http://docs.python.org/2/library/decimal.html) class in Python.
Unfortunately this class requires import like `from decimal import Decimal`
from a standard Python library.

I'm wondering if it would be a good idea to do it like this. It shouldn't
fail even with the trusted version of pl/python, as I'd rather see the
trusted version to allow importing packages from standard library.

regards,
Szymon