sympy/sympy — pull request #1000 by vperic (2012-01-19 14:41:45+00:00)
Title: external/test_sage: Disable Sage tests under Python 3

A recent commit allowed us to run Sage tests if Sage is installed (as
they have to be ran from within Sage). However, Sage does not currently
support Python 3, so disable the tests if running under Python 3.

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I noticed this in this sympy-bot report: http://reviews.sympy.org/report/agZzeW1weTNyDAsSBFRhc2sYw6AKDA

@asmeurer, can you test it please? I don't have Sage (and I'd rather not install it).