ipython/ipython — pull request #2439 by bfroehle (2012-09-27 16:43:58+00:00)
Title: Py3k: Octal (0777 -> 0o777)

Python 3 uses octal literals of the form `0o...`. From the [Python 3.0 changelog](http://docs.python.org/release/3.0.1/whatsnew/3.0.html), we see that support for this syntax is already in Python 2.6.

> New octal literals, e.g. 0o720 (already in 2.6). The old octal literals (0720) are gone.