Bug#921120: sagemath breaks sagetex autopkgtest: ImportError: No module named _tkinter, please install the python-tk package

Fri Feb 1 18:48:19 GMT 2019

Source: sagemath, sagetex
Control: found -1 sagemath/8.6-4
Control: found -1 sagetex/3.2+ds-1
Control: affects -1 src:texlive-base
Severity: important
User: debian-ci at lists.debian.org
Usertags: breaks needs-update

[X-Debbugs-CC: debian-ci at lists.debian.org, texlive-base at packages.debian.org]

Dear maintainers,

With a recent upload of sagemath the autopkgtest of sagetex fails in
testing when that autopkgtest is run with the binary packages of
sagemath from unstable. It passes when run with only packages from
testing. In tabular form:
                       pass            fail
sagemath               from testing    8.6-4
sagetex                from testing    3.2+ds-1
versioned deps [0]     from testing    from unstable
all others             from testing    from testing

I copied some of the output at the bottom of this report. It seems to me
that sagemath should not have dropped the dependency on python-tk.
However, it is possible that the issue is in six, or that sagetext now
should add it to the (test) dependencies.

Currently this regression is blocking the migration of sagemath (and
texlive-base) to testing [1]. Due to the nature of this issue, I filed
this bug report against both packages. Can you please investigate the
situation and reassign the bug to the right package? If needed, please
change the bug's severity. FYI, also in unstable, the test fails.

More information about this bug and the reason for filing it can be found on
https://wiki.debian.org/ContinuousIntegration/RegressionEmailInformation

Paul

[0] You can see what packages were added from the second line of the log
file quoted below. The migration software adds source package from
unstable to the list if they are needed to install packages from
sagemath/8.6-4. I.e. due to versioned dependencies or breaks/conflicts.
[1] https://qa.debian.org/excuses.php?package=sagemath

https://ci.debian.net/data/autopkgtest/testing/amd64/s/sagetex/1821254/log.gz
autopkgtest [04:29:31]: test compose-examples: [-----------------------
rm -f *.aux *.out *.log
rm -f *.sagetex.s* *.sobj *-tikz*.table
rm -f -r sage-plots-for-*.tex
rm -f example_doctest.sage
rm -f example.pdf
pdflatex -interaction batchmode example.tex
This is pdfTeX, Version 3.14159265-2.6-1.40.19 (TeX Live
2019/dev/Debian) (preloaded format=pdflatex)
 restricted \write18 enabled.
entering extended mode
sage example.sagetex.sage
Setting permissions of DOT_SAGE directory so only you can read and write it.
Processing Sage code for example.tex...
Inline formula 0 (line 35)
Inline formula 1 (line 36)
Inline formula 2 (line 38)
Inline formula 3 (line 39)
Code block (line 42) begin...end
Inline formula 4 (line 49)
Inline formula 5 (line 51)
Inline formula 6 (line 54)
Code block (line 58) begin...end
Inline formula 7 (line 63)
Inline formula 8 (line 64)
Code block (line 68) begin...end
Inline formula 9 (line 77)
Inline formula 10 (line 78)
Code block (line 81) begin...end
Inline formula 11 (line 85)
Code block (line 87) begin...Traceback (most recent call last):
  File "example.sagetex.sage.py", line 121, in <module>
    _st_.plot(_sage_const_0 , format='notprovided',
_p_=E.plot(-_sage_const_3 ,_sage_const_3 ))
  File "/usr/lib/python2.7/dist-packages/sagetex.py", line 239, in plot
    _p_.save(filename=plotfilename, **kwargs)
  File "/usr/lib/python2.7/dist-packages/sage/misc/decorators.py", line
411, in wrapper
    return func(*args, **kwds)
  File "/usr/lib/python2.7/dist-packages/sage/plot/graphics.py", line
3167, in save
    figure = self.matplotlib(**options)
  File "/usr/lib/python2.7/dist-packages/sage/plot/graphics.py", line
2543, in matplotlib
    import matplotlib.pyplot as plt
  File "/usr/lib/python2.7/dist-packages/matplotlib/pyplot.py", line
115, 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
62, in pylab_setup
    [backend_name], 0)
  File
"/usr/lib/python2.7/dist-packages/matplotlib/backends/backend_tkagg.py",
line 4, in <module>
    from . import tkagg  # Paint image to Tk photo blitter extension.
  File "/usr/lib/python2.7/dist-packages/matplotlib/backends/tkagg.py",
line 5, in <module>
    from six.moves import tkinter as Tk
  File "/usr/lib/python2.7/dist-packages/six.py", line 203, in load_module
    mod = mod._resolve()
  File "/usr/lib/python2.7/dist-packages/six.py", line 115, in _resolve
    return _import_module(self.mod)
  File "/usr/lib/python2.7/dist-packages/six.py", line 82, in _import_module
    __import__(name)
  File "/usr/lib/python2.7/lib-tk/Tkinter.py", line 42, in <module>
    raise ImportError, str(msg) + ', please install the python-tk package'
ImportError: No module named _tkinter, please install the python-tk package
end
Inline formula 12 (line 91)
Initializing plots directory
Plot 0 (line 97)

**** Error in Sage code on line 97 of example.tex! Traceback follows.

**** Running Sage on example.sage failed! Fix example.tex and try again.
make: *** [Makefile:52: example.pdf] Error 1
autopkgtest [04:29:35]: test compose-examples: -----------------------]

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 488 bytes
Desc: OpenPGP digital signature
URL: <http://alioth-lists.debian.net/pipermail/debian-science-maintainers/attachments/20190201/b02014d3/attachment-0001.sig>