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> Isn't that what the previous code (doctest code) did?
I don’t understand, could you rephrase?
> I thought that the code should be ported as far backwards as possible and that's why I
> used the plain assertEqual (I don't know exactly in with version the other assert
> methods were introduced. Unittest2?)
Michael Foord took over maintenance of unittest and released a bunch of improvements for 2.7 and 3.1, then further improvements in 3.2. unittest2 is a standalone release of this improved unittest (not sure if it’s like 3.1 or 3.2). For packaging in the 3.3 stdlib we have all new methods, and for distutils2 we use unittest2 which has them too and works with 2.4, so we have compat.