Difference in Python and Ruby interactive shells

[dmh2000]

Thanks all for the responses. Extra kudos to Steve J and Michele S.
that cleared it up for me.

the context of my question comes from reading up on Lisp in "Loving
Lisp - the Savy Programmer's Secret Weapon",
http://www.markwatson.com/opencontent/lisp_lic.htm, where the author
described building up a large system during test, that took a long to
to load. He was showing one reason why a dynamic language was more
productive than a statically compiled language.