Debian Bug report logs - #889137
python-matplotlib: Missing Gtk backend

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Pascal Giard <evilynux@gmail.com>

To: Debian Bug Tracking System <submit@bugs.debian.org>

Subject: python-matplotlib: Missing Gtk backend

Date: Fri, 2 Feb 2018 11:18:05 +0100

[Message part 1 (text/plain, inline)]

Package: python-matplotlib
Version: 2.1.1-2
Severity: normal

Dear Maintainer,

Version > 2.0 of the package does not include the necessary .so files for
the Gtk2 backend.

Attempting to use the Gtk2 backend with the following:
matplotlib.use('GtkAgg')

Results in the following error:

Traceback (most recent call last):
  File "/tmp/plot.py", line 23, in <module>
    import matplotlib.pyplot as plt
  File "/usr/lib/python2.7/dist-packages/matplotlib/pyplot.py", line 116,
in <module>
    _backend_mod, new_figure_manager, draw_if_interactive, _show =
pylab_setup()
  File "/usr/lib/python2.7/dist-packages/matplotlib/backends/__init__.py",
line 60, in pylab_setup
    [backend_name], 0)
  File
"/usr/lib/python2.7/dist-packages/matplotlib/backends/backend_gtkagg.py",
line 14, in <module>
    from matplotlib.backends.backend_gtk import (
  File
"/usr/lib/python2.7/dist-packages/matplotlib/backends/backend_gtk.py", line
35, in <module>
    from matplotlib.backends.backend_gdk import RendererGDK, FigureCanvasGDK
  File
"/usr/lib/python2.7/dist-packages/matplotlib/backends/backend_gdk.py", line
33, in <module>
    from matplotlib.backends._backend_gdk import pixbuf_get_pixels_array
ImportError: No module named _backend_gdk

Users should note however that the Gtk3 backend works and can be used with:
matplotlib.use('Gtk3Agg')

Thanks!

-Pascal

-- System Information:
Debian Release: buster/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.13.0-1-amd64 (SMP w/8 CPU cores)
Locale: LANG=fr_CA.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8),
LANGUAGE=fr_CA.UTF-8:fr:en_US:en (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages python-matplotlib depends on:
ii  libc6                                 2.26-6
ii  libfreetype6                          2.8.1-1
ii  libgcc1                               1:7.3.0-1
ii  libjs-jquery                          3.2.1-1
ii  libjs-jquery-ui                       1.12.1+dfsg-5
ii  libpng16-16                           1.6.34-1
ii  libstdc++6                            7.3.0-1
ii  python                                2.7.14-4
ii  python-backports.functools-lru-cache  1.4-2
ii  python-cycler                         0.10.0-1
ii  python-dateutil                       2.6.1-1
ii  python-matplotlib-data                2.1.1-2
ii  python-numpy [python-numpy-abi9]      1:1.13.3-2
ii  python-pyparsing                      2.1.10+dfsg1-1
ii  python-six                            1.11.0-1
ii  python-subprocess32                   3.2.7-2
ii  python-tz                             2017.2-2
ii  zlib1g                                1:1.2.8.dfsg-5

Versions of packages python-matplotlib recommends:
ii  python-pil  5.0.0-1
ii  python-tk   2.7.14-2

Versions of packages python-matplotlib suggests:
ii  dvipng                 1.15-1
ii  ffmpeg                 10:3.4.1-dmo3
ii  ghostscript            9.22~dfsg-1
ii  gir1.2-gtk-3.0         3.22.26-2
ii  inkscape               0.92.2-3
ii  ipython                5.5.0-1
ii  librsvg2-common        2.40.20-2
pn  python-cairocffi       <none>
pn  python-configobj       <none>
pn  python-excelerator     <none>
ii  python-gobject         3.26.1-2
pn  python-matplotlib-doc  <none>
pn  python-nose            <none>
ii  python-qt4             4.12.1+dfsg-2
ii  python-scipy           0.19.1-2
ii  python-sip             4.19.7+dfsg-1
pn  python-tornado         <none>
pn  python-traits          <none>
ii  python-wxgtk3.0        3.0.2.0+dfsg-6
ii  texlive-extra-utils    2017.20180110-1
ii  texlive-latex-extra    2017.20180110-1
pn  ttf-staypuft           <none>

-- no debconf information

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Message #10 received at 889137-done@bugs.debian.org (full text, mbox, reply):

From: Sandro Tosi <morph@debian.org>

To: Pascal Giard <evilynux@gmail.com>, 889137-done@bugs.debian.org

Subject: Re: Bug#889137: python-matplotlib: Missing Gtk backend

Date: Fri, 2 Feb 2018 09:41:15 -0500

> Version > 2.0 of the package does not include the necessary .so files for
> the Gtk2 backend.

this is expected: the GTK2 stack is being deprecated in Debian in
favor of GTK3, hence why it's no longer available in matplotlib too.
As you pointed out, please use Gtk3/Gtk3agg instead

-- 
Sandro "morph" Tosi
My website: http://sandrotosi.me/
Me at Debian: http://wiki.debian.org/SandroTosi
G+: https://plus.google.com/u/0/+SandroTosi

Message #15 received at 889137@bugs.debian.org (full text, mbox, reply):

From: Pascal Giard <evilynux@gmail.com>

To: Sandro Tosi <morph@debian.org>

Cc: 889137@bugs.debian.org

Subject: Re: Bug#889137: python-matplotlib: Missing Gtk backend

Date: Fri, 2 Feb 2018 16:14:15 +0100

[Message part 1 (text/plain, inline)]

Fair enough Sandro.
Then please update the README.Debian file accordingly as it implies that
Gtk2 is still supported.

Best regards,

-Pascal

-Pascal
--
Homepage (http://giard.info)
Debian GNU/Linux (http://www.debian.org)
TCL: École polytechnique fédérale de Lausanne (http://tcl.epfl.ch)



On Fri, Feb 2, 2018 at 3:41 PM, Sandro Tosi <morph@debian.org> wrote:

> > Version > 2.0 of the package does not include the necessary .so files for
> > the Gtk2 backend.
>
> this is expected: the GTK2 stack is being deprecated in Debian in
> favor of GTK3, hence why it's no longer available in matplotlib too.
> As you pointed out, please use Gtk3/Gtk3agg instead
>
> --
> Sandro "morph" Tosi
> My website: http://sandrotosi.me/
> Me at Debian: http://wiki.debian.org/SandroTosi
> G+: https://plus.google.com/u/0/+SandroTosi
>

[Message part 2 (text/html, inline)]

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