bpython appears to do what you want.
bpython is a fancy interface to the Python interpreter for Linux, BSD, OS X and Windows (with some work). bpython is released under the MIT License. It has the following (special) features:
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- In-line syntax highlighting
- Readline-like autocomplete with suggestions displayed as you type
- Expected parameter list for any Python function
- Send the code you've entered off to a pastebin
- Auto-indentation
And more
