[Plplot-devel] Python3

[Alan W. I. <ir...@be...>]

On 2017-04-17 16:30-0700 Alan W. Irwin wrote:

> Note also that there are additional non-standard Python examples in
> the examples/python subdirectory so those should all be checked to
> make sure they work with both Python 2 and Python 3.  And similarly
> for the pyqt4 and pyqt5 standard examples.

Hi Hazen:

Could you please test commit 578b028?  For that commit I made some
modest progress with Python 3 for both pyqt4 and pyqt5, but I have hit
a roadblock with a run-time error saying the plplot_pyqt[45] extension
modules are not initialized properly when the script tries to import
one of those modules.  The sip, pyqt[45], and python3 software
packages are all supposed to work well together for their latest
versions according to my google search results, but it is possible the
Debian Jessie versions of these software packages are too old and
buggy which is why I am asking you to test this commit by attempting
to build the test_pyqt[45]_example target (depending on whether your
build system finds Qt4 or Qt5) for both the python2 and python3 cases
(where the former builds and runs plplot_pyqt[45] without issues here,
but the latter case only builds these extension modules without
obvious issues but runs into initialization errors at run time).

The test_pyqt4_example target build all
prerequisites with success but fails the final run-time test.

Here is the relevant error message if I attempt to do the
run-time test by hand:

software@raven> python3 examples/python/pyqt4_example.py 
Traceback (most recent call last):
   File "examples/python/pyqt4_example.py", line 33, in <module>
     import plplot_pyqt4
ImportError: dynamic module does not define init function (PyInit_plplot_pyqt4)

Do you get a similar error there or success?

For the record here is the complete list of python3-related packages
I have installed on Debian Jessie.  If you think I am missing anything
please let me know.

software@raven> dpkg --list |grep python3 |cut --delimiter=" " --fields=3
libpython3-dev:amd64
libpython3-stdlib:amd64
libpython3.4:amd64
libpython3.4-dev:amd64
libpython3.4-minimal:amd64
libpython3.4-stdlib:amd64
python3
python3-apt
python3-chardet
python3-checkbox-ng-doc
python3-debian
python3-dev
python3-dugong
python3-magic
python3-minimal
python3-numpy
python3-pkg-resources
python3-pyqt4
python3-pyqt5
python3-sip
python3-sip-dev
python3-six
python3-tk
python3-uno
python3.4
python3.4-dev
python3.4-minimal

Alan
__________________________
Alan W. Irwin

Astronomical research affiliation with Department of Physics and Astronomy,
University of Victoria (astrowww.phys.uvic.ca).

Programming affiliations with the FreeEOS equation-of-state
implementation for stellar interiors (freeeos.sf.net); the Time
Ephemerides project (timeephem.sf.net); PLplot scientific plotting
software package (plplot.sf.net); the libLASi project
(unifont.org/lasi); the Loads of Linux Links project (loll.sf.net);
and the Linux Brochure Project (lbproject.sf.net).
__________________________

Linux-powered Science
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