[Piglit] Convert from python2 to python3

[Ilia Mirkin]

On Mon, Feb 24, 2014 at 2:42 PM, Dylan Baker <baker.dylan.c at gmail.com> wrote:
> This series makes the transition from python2 to python3. In general

Out of curiousity, what's the motivation for this? I've been able to
avoid python3 quite nicely thus far, all it seems to do is break
compatibility with existing setups... Admittedly piglit is targeted at
developers, who probably have the latest and greatest stuff, so
perhaps not a huge issue.

> this is done via the 2to3 utility provided by the python project,
> however, there are some cases that have been further edited, usually
> becasue 2to3 is very fond of replacing iterators with list(iterator).
>
> I have targeted python 3.3 as the version, it is the latest stable
> version of python (3.4 is expected this year), and provides a number of
> features that would be very useful, like the ability to implement test
> timeouts trivially.
>
> There are some interesting changes between the two versions worth
> pointing out:
>
> 1) Everything is an iterator. If you need a list returned that must be
>    done explicitly.
> 2) Int and Long have been joined into a single class. This has
>    interesting implications for the generated tests where numpy is not
>    used.
> 3) Python3 does not format floats the same way. It is probably better to
>    use numpy anyway
> 4) mixing spaces and tabs in python2 generates a runtime warning, in
>    python3 it generates an runtime exception.
> 5) Numerous broken things in python2 are fixed in python3
>
> Patches 1-2: Lay groundwork to ease the transition
> Patch 3:     Converts framework to python3 this is a clean transition
>                          and shouldn't cause any problems
> Patch 4:     Changes the generators. There are definately some changes
>                          here that might be problematic
> Patch 5:     Converts CMakeLists to use python3.3 instead of python2
>
>
> Jose: I have cc'd you becasue I couldn't find a quick and easy fix for
> framework/junit.py, which IIRC you wrote and maintain seperatly from
> piglit, do you have a python3 version?
>
> Tom: I cannot test the CL generated tests, my r600 machine is not
> working at the moment, and I have noticed a loss of 5 points of
> percision on a number of tests, if that is a problem I will convert the
> CL generators to use numpy instead.
>
>
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