colloquial names for types?

[Tim Peters]

[Inyeol Lee]
> ...
> >>> 3.__class__.__name__
> SyntaxError: invalid syntax
> >>> dir(3)
> [ ... '__class__', ... ]
>
> I'm confused. Why 3.__class__ raises exception?

It's parsed as the floating-point literal "3.", followed by the identifier
"__class__", and that's syntactically meaningless.  Try, e.g., (3).__class__
instead.  "3 .__class__" will also work.