[Slackbuilds-users] Dependency error for python3-matplotlib

[Ythogtha]

> On Sat, 18 Nov 2017 08:22:27 -0800
> Benjamin Trigona-Harany <slackbuilds at jaxartes.net> wrote:
> 
> > On Saturday, November 18, 2017 1:00:40 AM PST Ythogtha wrote:
> > > Hi!
> > > 
> > > 	python3-matplotlib lists python-dateutil as requirement,
> > > but it needs to be python3-dateutil.
> > > The README tells datetutil and pytz needs to be compiled against
> > > python3, so I guess dateutil was like pytz and needed to be bluit
> > > with PYTHON3=yes, but that doesn't seems to be the case anymore.  
> > 
> > The confusion may be down to the different ways of doing SlackBuilds
> > for Python 3 modules. By my count, there are four:
> > 
> > 1. Silently install Python 3 support if python/python3 is installed.
> > 2. Install Python 3 support if you pass PYTHON3=yes (or some other
> > option) to the SlackBuild.
> > 3. Have a separate python3-XYZ SlackBuild.
> > 
> > Personally, I much prefer option 3 since I can then be explicit about
> > what is installed and what should go in REQUIRES without complicated
> > instructions in README about dependencies.
> > 
> > Now that Python 3 is in current, however, the next release of
> > Slackware and its Slackbuilds offers an opportunity. Option 1,
> > previously my least favourite, is now viable except where a module
> > exists for Python 2 but not 3 (or vice versa) and a few other edge
> > cases (Jupyter kernels is one I know of).
> > 
> > I know we don't like enforcing rules on maintainers, but a friendly 
> > recommendation for Python SlackBuilds would be welcome :)
> 
> 
> For Slackware 15.0, I think the best option is to have both python2 and 
> python3 support in a single package, since there's the expectation that
> both python2 and python3 are on the system already.
> 
> -RW

I agree.
Anyway, the python3-matplotlib.info still needs to list python3-dateutil instead
as python-dateutil as requirement. At least for the time being !

-- 
Arnaud <yth at ythogtha.org>