Update tox version and configuration.

[mrmachine]

• Use tox 1.8+ so we can use generative envlist and conditional deps.
• Don't test older unsupported versions of Django.
• Do test older supported versions of Python, according to Django release notes, except for django14-py25 because Python 2.5 is not supported by tox since 1.7.0.
• Fix Python 3.2 u'' syntax errors.

[landscape-bot]

Repository health increased by 2% when pulling ebcf2df on ixc:ixc/simplified-tox-ini into f5f7207 on paulocheque:master.

• 2 new problems were found (including 0 errors and 2 code smells).
• 11 problems were fixed (including 9 errors and 2 code smells).

[coveralls]

Coverage decreased (-0.08%) to 79.79% when pulling ebcf2df on ixc:ixc/simplified-tox-ini into f5f7207 on paulocheque:master.

[landscape-bot]

Repository health increased by 2% when pulling ee837ce on ixc:ixc/simplified-tox-ini into f5f7207 on paulocheque:master.

• 2 new problems were found (including 0 errors and 2 code smells).
• 11 problems were fixed (including 9 errors and 2 code smells).

[coveralls]

Coverage decreased (-0.08%) to 79.79% when pulling ee837ce on ixc:ixc/simplified-tox-ini into f5f7207 on paulocheque:master.

[mrmachine]

I didn't see pypy mentioned in the Django release notes, and I couldn't get the tests to pass with pypy even before making any changes to DDF. But that could just be my pypy setup, so feel free to add it back in.

envlist =
    django14-py{26,27},
    django16-py{26,27,32,33,pypy},
    django17-py{27,32,33,34,pypy},

basepython=
    py26: python2.6
    py27: python2.7
    py32: python3.2
    py33: python3.3
    py34: python3.4
    pypy: pypy

[landscape-bot]

Repository health increased by 2% when pulling 4087596 on ixc:ixc/simplified-tox-ini into f5f7207 on paulocheque:master.

• 2 new problems were found (including 0 errors and 2 code smells).
• 11 problems were fixed (including 9 errors and 2 code smells).

[mrmachine]

I've updated the failing PyPy test to pass, but I'm not sure if the failure was a test error or a code error. Also testing old/unsupported versions of Django again and PyPy. Up to you if you want to leave them in or remove them.

[coveralls]

Coverage remained the same at 79.87% when pulling 4087596 on ixc:ixc/simplified-tox-ini into f5f7207 on paulocheque:master.

[coveralls]

Coverage remained the same at 79.87% when pulling 4087596 on ixc:ixc/simplified-tox-ini into f5f7207 on paulocheque:master.

[mrmachine]

It seems to be failing on Travis CI now with PyPy, but works for me locally with PyPy, so I'm not sure what's going on with that BadDataError. Maybe it needs to catch either error_msg or error_msg2 for PyPy.

[landscape-bot]

Repository health increased by 2% when pulling 239b6cd on ixc:ixc/simplified-tox-ini into f5f7207 on paulocheque:master.

• 2 new problems were found (including 0 errors and 2 code smells).
• 11 problems were fixed (including 9 errors and 2 code smells).

[coveralls]

Coverage increased (+0.01%) to 79.88% when pulling 239b6cd on ixc:ixc/simplified-tox-ini into f5f7207 on paulocheque:master.

[paulocheque]

I will close this PR, but I changed the code thanks for your commit. I put a link to this PR in the commit message: 4b09bfd

Thanks!

[mrmachine]

Thanks for merging. I noticed you are still not testing Python 2.6 and 3.2 (and subsequently don't need the u'' fixes for 3.2). I think those versions of Python are officially supported by Django (2.6 for 1.4-1.6 and 3.2 for 1.5-1.8), so I'm just curious about why you don't want to test against them as well?

[paulocheque]

Oh, actually, I got the idea for your comments. Now Python2.7 is the default python in most Linux distributions, so I believe the cost to use Python2.7 instead of Python2.6 is very low.

About 3.2, it is a very distinct version of Python that break compatibility badly with older versions. For that reason 3.3 and 3.4 fix the 3.2 "errors" of compatibility. For that reason I believe this version should be avoided.

In general, I believe Python community should incentivate Python2.7 and Python3.4 versions specially.

What do you think about it?

Do you use which Python?

[mrmachine]

I don't disagree that 2.6 and 3.2 are probably not very often used anymore, however, I think that if supported versions of Django support those versions of Python, then DDF should as well. I believe Ubuntu 12.04 LTS still using Python 3.2, and Ubuntu 10.04 LTS which only recently reached EOL was probably using Python 2.6. For some users they are just stuck with whatever version their distribution ships with, so they can get security updates. If the changes for DDF to support those versions are not a major effort, then I would try to include them.

[paulocheque]

Ok, great! So, do you think it is easy to create a clean pull request, to avoid merge problems with the tox.ini file? The changes of tox.ini would be basically add 26 and 32 versions. And you have already done the hard work to change the python strings too.

[mrmachine]

Done. See #64