The print(x) instead of print x thing is going to kill me in interactive sessions. I can feel it now. It's those little things that get ingrained in your daily work that are hard to break.
"ls" is a simple command -- invokes the Unix command "ls -l". A more complicated one: "h os" -- run help on the os module (just like "help(os)"). This is kinda tricky because "h os" is actually a syntax error in Python. When interactive, I catch syntax errors and see if they are user defined commands, in which case I execute the desired command. This works for Python 2.5, but shouldn't be too hard to port to Python 3.0.
I briefly looked at IPython, but that seemed to complicated for my needs.
(Also, http://defcraft.org/hacks/pycmds/strftime_helper.py uses the above file to help the user with strftime spec usage. I can never remember all the special characters.)
We use similar technic with hpy - you type in Hebrew Python http://nirs.freeshell.org/code/hpy/ , then each line is translated to Python and executed.
How do create more fancy links here?