Github user spmallette commented on the issue:
https://github.com/apache/tinkerpop/pull/682
I've dug into supporting `BigDecimal` directly and it's turning into a mess
a bit. Python does have `Decimal` class which is like `BigDecimal` but it
doesn't serialize through the standard JSON processor:
https://stackoverflow.com/questions/1960516/python-json-serialize-a-decimal-object
so I coerced to float to match our extended module format:
http://tinkerpop.apache.org/docs/current/dev/io/#_bigdecimal
for a number in the `@value`. That sorta worked, but it then causes a loss
in precision anyway. I think it's just better to go with what I said before.
Just coerce the `BigDecimal` groovy pushes on us to double internally and then
it all just works. The test should not explicitly test `BigDecimal`. It should
test:
```groovy
g.withSack(2).V().sack(Operator.div).by(constant(3.0)).sack()
```
which in Java will just test double stuff, but in Groovy it will produce a
`BigDecimal` and our code gets tested. Does that make sense?
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