check whether a value is scalar

[Eli]

Python treats integers as objects, but as I mentioned that I do care
about the value only, and not its object methods. I mean that it's not
possible to share objects among application in different programming
languages, but it's possible to share the scalar values among them.
Strings, booleans, integeres, floats, null are types that most
programming languages use. Arrays are also commonly used, but each
programming language defines and uses it differently, so it's more
problematic to treat it as scalar (for example python uses dictionaries
while other langs uses regular arrays only).