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Sender: Kushal Kumaran <kushal.kumaran@gmail.com>
From: Kushal Kumaran <kushal.kumaran+python@gmail.com>
To: python-list@python.org
Subject: Re: PyGLet, 2to3...?
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Date: Fri, 26 Jul 2013 10:22:16 +0530
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John Ladasky <john_ladasky@sbcglobal.net> writes:

> On Thursday, July 25, 2013 3:26:01 PM UTC-7, John Ladasky wrote:
>> I'll try again from scratch, and see whether that clears up my problems.
>
> Nope, that didn't work.
>
> =======================================
>
> john@john:~/Desktop/pyglet-1.2alpha1$ sudo python3 setup.py install
>
> [sudo] password for john: 
>
> running install
> running build
> running build_py
> running install_lib
> running install_egg_info
> Removing /usr/local/lib/python3.3/dist-packages/pyglet-1.2alpha1.egg-info
> Writing /usr/local/lib/python3.3/dist-packages/pyglet-1.2alpha1.egg-info
>
> john@john:~/Desktop/pyglet-1.2alpha1$ python3
>
> Python 3.3.1 (default, Apr 17 2013, 22:30:32) 
> [GCC 4.7.3] on linux
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import pyglet
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "./pyglet/__init__.py", line 276

----------^

Your import is attempting to import from your current directory, which
has the pre-2to3 version of the files packaged in the original
distribution.  Switch away and try again.

>     print '[%d] %s%s %s' % (thread, indent, name, location)
>                        ^
> SyntaxError: invalid syntax
>
> =======================================
>
> The source code link that Kushal posted is dated December 19, 2012.  Since that was several months ago, I double-checked the source code of setup.py in the 1.2alpha1 package that I downloaded.  It would appear to perform the same check of sys.version_info that was shown on the Google Code page.
>
> To see how that check actually runs, I saved a copy of setup.py as setup2.py, adding diagnostic calls to print() as shown in the code block below:
>
> =======================================
>
> if sys.version_info >= (3,):
>     # Automatically run 2to3 when using Python 3
>     print("Python version is 3.0 or later.") # I added this
>     if _have_setuptools:
>         print("Have setuptools.") # I added this
>         setup_info["use_2to3"] = True
>     else:
>         print("Do not have setuptools.") # I added this
>         from distutils.command.build_py import build_py_2to3
>         setup_info["cmdclass"] = {"build_py" : build_py_2to3}
>
> =======================================
>
> Here's the output:
>
> =======================================
>
> john@john:~/Desktop/pyglet-1.2alpha1$ sudo python3 setup2.py install
>
> Python version is 3.0 or later.
> Do not have setuptools.
> running install
> running build
> running build_py
> running install_lib
> running install_egg_info
> Removing /usr/local/lib/python3.3/dist-packages/pyglet-1.2alpha1.egg-info
> Writing /usr/local/lib/python3.3/dist-packages/pyglet-1.2alpha1.egg-info
>
> =======================================
>
> So, I don't know much yet about this _have_setuptools flag.  I don't know whether it has to be True, instead of False, in order for 2to3 to work properly.  I get the impression from the code that 2to3 should run regardless of the _have_setuptools flag, it is just that the task is accomplished in two different ways?

That seems correct.  My familiarity with the python packaging tools is
limited, though.

-- 
regards,
kushal