Coding conventions for class names

[Kay Schluehr]

set, int, float, list, object,...

Don't see any of the basic types following the capitalized word
convention for classes covered by PEP 08. This does not hold only for
__builtins__ in the strict sense but also for types defined in builtin
modules like datetime.

My question is: does anyone actually follow guidelines here and if yes
which ones and are they resonable ( e.g. stable with regard to
refactoring etc. )?