[Scons-dev] That was easy…

[Neal Becker]

Tim Jenness wrote:

> 
>> On Dec 25, 2015, at 06:49 , Neal Becker <ndbecker2 at gmail.com> wrote:
>> 
>> Tim Jenness wrote:
>> 
>>> 
>>>> On Dec 24, 2015, at 09:47 , Russel Winder <russel at winder.org.uk> wrote:
>>>> 
>>>> …well, sort of.
>>>> 
>>>> OK first major hurdle done: python3-port has now had default merged
>>>> into it. Enough of it works to be able to compile Fortran code using
>>>> this version of SCons on Python 2. Obviously (!) it all breaks using
>>>> Python 3, and (obviously) many, many of the tests fail with any Python
>>>> version.
>>>> 
>>>> There is now a long haul editing all the print statements into Python 3
>>>> format in all the tests as well as the rest of the source code. I
>>>> clearly need to find a way of doing this automatically. Aha 2-to-3 I
>>>> think is required…
>>>> 
>>> 
>>> I find that
>>> 
>>> futurize -1 *.py
>>> 
>>> is incredibly helpful here (-2 is the full on port to python 3 but -1 is
>>> the command to make everything work with 2.7 features). This is from the
>>> “future” package on PyPI.
>>> 
>>> I wouldn’t be surprised if the entire port to 2.7/3.3+ could have been
>>> done on master using futurize directly (without six or a long-lived
>>> porting branch).
>>> 
>>> —
>>> Tim Jenness
>>> 
>> 
>> Early on I really liked future package, but now it installs a ton of
>> stuff that causes massive conflicts, and I'm no longer a fan
>> 
> 
> I’m not really sure what you mean. future package doesn’t have any
> dependencies as far as I can tell from the requirements.txt in the
> package. There are some additional dependencies if you need the code to
> work on python 2.6 but that’s not an issue here.
> 
> futurize -1 doesn’t inject dependencies into the code base itself.
> 
> —
Haven't tried futurize with '-1', but I meant that if you pip install future 
it installs many entries into site-packages, in a very intrusive manner.  If 
you pip install future, it puts not only future and past into site-packages, 
but such goodies as builtins, and many more.  The builtins caused me 
conflicts which were very difficult to track down.