If you frequently use python interactively by typing in python or python3 then you will really love this next tip.

There is a better interactive python shell that has in-line syntax highlighting and code insight (aka autocomplete). The code insight isn't perfect and doesn't work 100% of the time but it does work most of the time. The syntax highlighting is really nice as well.

Do these features look good?

In-line syntax highlighting
Readline-like autocomplete with suggestions displayed as you type.
Expected parameter list for any Python function.
"Rewind" function to pop the last line of code from memory and re-evaluate.
Send the code you've entered off to a pastebin.
Save the code you've entered to a file.
Auto-indentation.
Python 3 support.

Introducing bpython!

Bpython is an interactive shell for python that has powerful features that mimic a quality IDE. In the end it is still a low level interpreted shell, but it can drastically improve your quality of life if you frequently use the interactive shell.