Bug 1321456

Summary: RFE: drop hard dependency on the default tk backend
Product: [Fedora] Fedora Reporter: Volker Fröhlich <volker27>
Component: python-matplotlibAssignee: Elliott Sales de Andrade <quantum.analyst>
Status: NEW --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
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Version: rawhideCC: cstratak, gwync, jonathan.underwood, jspaleta, paulo.cesar.pereira.de.andrade, python-sig, tomspur
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Description Volker Fröhlich 2016-03-27 11:44:06 UTC 
rpm -q --requires python2-matplotlib

...
python2-matplotlib-tk(x86-64) = 1.4.3-11.fc23
...


This essentially drags in tkinter. Rawhide is also affected and I guess all versions in between.
Comment 1 Thomas Spura 2016-04-04 11:02:51 UTC 
What solution would you suggest?
Matplotlib depends on one (random) backend and I don't think it makes much difference to depend on another one instead, which then drags in other dependencies.
Comment 2 Dominik 'Rathann' Mierzejewski 2016-06-23 09:27:25 UTC 
In theory, we could add virtual provides to all backend subpackagers, e.g.:

Provides: python[23]-matplotlib-backend

and then add a hard dependency on it to the main package:

Requires: python[23]-matplotlib-backend = %{version}-%{release}

We could also favour the tk backend by using

Recommends: python[23]-matplotlib-%{backend_subpackage} = %{version}-%{release}

I'll have to test how well this works in practice.
Comment 3 Thomas Spura 2016-06-23 18:28:59 UTC 
The default backend is also written in the default configuration file.
IIRC, it is not possible to pick a random, existing backend because of that.

Or did that change recently?
Comment 4 Dominik 'Rathann' Mierzejewski 2016-06-24 07:18:59 UTC 
No, I haven't changed that. I imagine it's possible to make it work like this:

if just one backend is installed, set it in matplotlibrc
else (more than one is installed):
    if tk backend is present, set tk in matplotlibrc
    else pick the last one installed

I'm not sure it's worth the effort, though.
Comment 5 Dominik 'Rathann' Mierzejewski 2016-06-24 07:21:14 UTC 
Basically, I meant to say: patches welcome.
Comment 6 Fedora Admin user for bugzilla script actions 2020-07-08 14:54:38 UTC 
This package has changed maintainer in the Fedora.
Reassigning to the new maintainer of this component.