Why is Python popular, while Lisp and Scheme aren't?

[Jacek Generowicz]

Michael Hudson <mwh at python.net> writes:

> > Anyway, what IDE /do/ you use?
> 
> Emacs + an interactive session in an xterm or Terminal.app window.

Why do you prefer this to having your interactive session within
Emacs?  I find Python mode's provision for sending code to the Python
session for execution, extremely useful.