If I recall correctly, KDE currently only supports Python 2 for bindings.

I have installed kde via arch package manager (pacman) and the KDE version here is 4.11.00
The following shows that multiple pythons are installed:

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[root@alpha ~]# python /usr/bin/synaptiks
Traceback (most recent call last):
  File "/usr/bin/synaptiks", line 5, in <module>
    from pkg_resources import load_entry_point
  File "/usr/lib/python3.3/site-packages/pkg_resources.py", line 2793, in <module>
    working_set.require(__requires__)
  File "/usr/lib/python3.3/site-packages/pkg_resources.py", line 673, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/usr/lib/python3.3/site-packages/pkg_resources.py", line 576, in resolve
    raise DistributionNotFound(req)
pkg_resources.DistributionNotFound: synaptiks==0.8.1

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root@alpha ~]# python2 /usr/bin/synaptiks
Segmentation fault (core dumped)

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[root@alpha ~]# python2.7 /usr/bin/synaptiks
Segmentation fault (core dumped)

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[root@alpha ~]# python3 /usr/bin/synaptiks
Traceback (most recent call last):
  File "/usr/bin/synaptiks", line 5, in <module>
    from pkg_resources import load_entry_point
  File "/usr/lib/python3.3/site-packages/pkg_resources.py", line 2793, in <module>
    working_set.require(__requires__)
  File "/usr/lib/python3.3/site-packages/pkg_resources.py", line 673, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/usr/lib/python3.3/site-packages/pkg_resources.py", line 576, in resolve
    raise DistributionNotFound(req)
pkg_resources.DistributionNotFound: synaptiks==0.8.1

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[root@alpha ~]# python3.3 /usr/bin/synaptiks
Traceback (most recent call last):
  File "/usr/bin/synaptiks", line 5, in <module>
    from pkg_resources import load_entry_point
  File "/usr/lib/python3.3/site-packages/pkg_resources.py", line 2793, in <module>
    working_set.require(__requires__)
  File "/usr/lib/python3.3/site-packages/pkg_resources.py", line 673, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/usr/lib/python3.3/site-packages/pkg_resources.py", line 576, in resolve
    raise DistributionNotFound(req)
pkg_resources.DistributionNotFound: synaptiks==0.8.1

Does python2 function with any other Python scripts, in particular ones which use the KDE or Qt bindings?

bcooksley wrote:Does python2 function with any other Python scripts, in particular ones which use the KDE or Qt bindings?

Can you give any example so can post results?

You can find a hello world example here - http://en.wikipedia.org/wiki/PyQt#Hello_world_example

can you install python2-setuptools https://www.archlinux.org/packages/extr ... etuptools/ and then try

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python2 /usr/bin/synaptiks

bcooksley wrote:You can find a hello world example here - http://en.wikipedia.org/wiki/PyQt#Hello_world_example

Yup, python2 on hello world example is working file, it opens a blank window.
I also test python2 on 'cxrun' (a crossover app to run windows exe(s)) and cxrun also ran sucessfully with python2.

google01103 wrote:can you install python2-setuptools https://www.archlinux.org/packages/extr ... etuptools/ and then try

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python2 /usr/bin/synaptiks

It is already installed, but still I reinstalled it as your advice, but still no luck

One more thing.
the touchpad in control center is giving this backtrace:

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Application: KDE Control Module (kcmshell4), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[KCrash Handler]
#5  0x00007f3429d4d200 in QMetaObject::cast(QObject*) const () from /usr/lib/libQtCore.so.4
#6  0x00007f3414d9b4e2 in ?? () from /usr/lib/kde4/plugins/styles/oxygen.so
#7  0x00007f3414d9b650 in ?? () from /usr/lib/kde4/plugins/styles/oxygen.so
#8  0x00007f3414d8452a in ?? () from /usr/lib/kde4/plugins/styles/oxygen.so
#9  0x00007f3428f1c00a in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#10 0x00007f34292b98ee in QFrame::event(QEvent*) () from /usr/lib/libQtGui.so.4
#11 0x00007f3428ecd12c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#12 0x00007f3428ed36f0 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#13 0x00007f342aaf772a in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#14 0x00007f3429d46ebd in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#15 0x00007f3428f193af in QWidget::ensurePolished() const () from /usr/lib/libQtGui.so.4
#16 0x00007f34292be343 in QLabel::minimumSizeHint() const () from /usr/lib/libQtGui.so.4
#17 0x00007f34292be403 in QLabel::sizeHint() const () from /usr/lib/libQtGui.so.4
#18 0x00007f342abb46ac in KNumInput::layout(bool) () from /usr/lib/libkdeui.so.5
#19 0x00007f342abb488f in KNumInput::setLabel(QString const&, QFlags<Qt::AlignmentFlag>) () from /usr/lib/libkdeui.so.5
#20 0x00007f342abb49ba in KDoubleNumInput::setLabel(QString const&, QFlags<Qt::AlignmentFlag>) () from /usr/lib/libkdeui.so.5
#21 0x00007f340cbf597f in ?? () from /usr/lib/python2.7/site-packages/PyKDE4/kdeui.so
#22 0x00007f340feb7839 in PyEval_EvalFrameEx () from /usr/lib/libpython2.7.so.1.0
#23 0x00007f340feb7552 in PyEval_EvalFrameEx () from /usr/lib/libpython2.7.so.1.0
#24 0x00007f340feb8290 in PyEval_EvalCodeEx () from /usr/lib/libpython2.7.so.1.0
#25 0x00007f340feb7489 in PyEval_EvalFrameEx () from /usr/lib/libpython2.7.so.1.0
#26 0x00007f340feb7552 in PyEval_EvalFrameEx () from /usr/lib/libpython2.7.so.1.0
#27 0x00007f340feb7552 in PyEval_EvalFrameEx () from /usr/lib/libpython2.7.so.1.0
#28 0x00007f340feb7552 in PyEval_EvalFrameEx () from /usr/lib/libpython2.7.so.1.0
#29 0x00007f340feb7552 in PyEval_EvalFrameEx () from /usr/lib/libpython2.7.so.1.0
#30 0x00007f340feb7552 in PyEval_EvalFrameEx () from /usr/lib/libpython2.7.so.1.0
#31 0x00007f340feb7552 in PyEval_EvalFrameEx () from /usr/lib/libpython2.7.so.1.0
#32 0x00007f340feb7552 in PyEval_EvalFrameEx () from /usr/lib/libpython2.7.so.1.0
#33 0x00007f340feb7552 in PyEval_EvalFrameEx () from /usr/lib/libpython2.7.so.1.0
#34 0x00007f340feb7552 in PyEval_EvalFrameEx () from /usr/lib/libpython2.7.so.1.0
#35 0x00007f340feb7552 in PyEval_EvalFrameEx () from /usr/lib/libpython2.7.so.1.0
#36 0x00007f340feb7552 in PyEval_EvalFrameEx () from /usr/lib/libpython2.7.so.1.0
#37 0x00007f340feb7552 in PyEval_EvalFrameEx () from /usr/lib/libpython2.7.so.1.0
#38 0x00007f340feb7552 in PyEval_EvalFrameEx () from /usr/lib/libpython2.7.so.1.0
#39 0x00007f340feb8290 in PyEval_EvalCodeEx () from /usr/lib/libpython2.7.so.1.0
#40 0x00007f340feb7489 in PyEval_EvalFrameEx () from /usr/lib/libpython2.7.so.1.0
#41 0x00007f340feb7552 in PyEval_EvalFrameEx () from /usr/lib/libpython2.7.so.1.0
#42 0x00007f340feb8290 in PyEval_EvalCodeEx () from /usr/lib/libpython2.7.so.1.0
#43 0x00007f340feb7489 in PyEval_EvalFrameEx () from /usr/lib/libpython2.7.so.1.0
#44 0x00007f340feb8290 in PyEval_EvalCodeEx () from /usr/lib/libpython2.7.so.1.0
#45 0x00007f340feb7489 in PyEval_EvalFrameEx () from /usr/lib/libpython2.7.so.1.0
#46 0x00007f340feb8290 in PyEval_EvalCodeEx () from /usr/lib/libpython2.7.so.1.0
#47 0x00007f340fe47b00 in function_call () from /usr/lib/libpython2.7.so.1.0
#48 0x00007f340fe23c13 in PyObject_Call () from /usr/lib/libpython2.7.so.1.0
#49 0x00007f340fe3241d in instancemethod_call () from /usr/lib/libpython2.7.so.1.0
#50 0x00007f340fe23c13 in PyObject_Call () from /usr/lib/libpython2.7.so.1.0
#51 0x00007f340fe77e57 in slot_tp_init () from /usr/lib/libpython2.7.so.1.0
#52 0x00007f340fe76bcf in type_call () from /usr/lib/libpython2.7.so.1.0
#53 0x00007f340fe23c13 in PyObject_Call () from /usr/lib/libpython2.7.so.1.0
#54 0x00007f340feb39e1 in PyEval_EvalFrameEx () from /usr/lib/libpython2.7.so.1.0
#55 0x00007f340feb8290 in PyEval_EvalCodeEx () from /usr/lib/libpython2.7.so.1.0
#56 0x00007f340fe47b00 in function_call () from /usr/lib/libpython2.7.so.1.0
#57 0x00007f340fe23c13 in PyObject_Call () from /usr/lib/libpython2.7.so.1.0
#58 0x00007f340fe3241d in instancemethod_call () from /usr/lib/libpython2.7.so.1.0
#59 0x00007f340fe23c13 in PyObject_Call () from /usr/lib/libpython2.7.so.1.0
#60 0x00007f340fe77e57 in slot_tp_init () from /usr/lib/libpython2.7.so.1.0
#61 0x00007f340fe76bcf in type_call () from /usr/lib/libpython2.7.so.1.0
#62 0x00007f340fe23c13 in PyObject_Call () from /usr/lib/libpython2.7.so.1.0
#63 0x00007f340feb39e1 in PyEval_EvalFrameEx () from /usr/lib/libpython2.7.so.1.0
#64 0x00007f340feb8290 in PyEval_EvalCodeEx () from /usr/lib/libpython2.7.so.1.0
#65 0x00007f340fe47b00 in function_call () from /usr/lib/libpython2.7.so.1.0
#66 0x00007f340fe23c13 in PyObject_Call () from /usr/lib/libpython2.7.so.1.0
#67 0x00007f340fe3241d in instancemethod_call () from /usr/lib/libpython2.7.so.1.0
#68 0x00007f340fe23c13 in PyObject_Call () from /usr/lib/libpython2.7.so.1.0
#69 0x00007f340fe77e57 in slot_tp_init () from /usr/lib/libpython2.7.so.1.0
#70 0x00007f340fe76bcf in type_call () from /usr/lib/libpython2.7.so.1.0
#71 0x00007f340fe23c13 in PyObject_Call () from /usr/lib/libpython2.7.so.1.0
#72 0x00007f340feb39e1 in PyEval_EvalFrameEx () from /usr/lib/libpython2.7.so.1.0
#73 0x00007f340feb8290 in PyEval_EvalCodeEx () from /usr/lib/libpython2.7.so.1.0
#74 0x00007f340feb7489 in PyEval_EvalFrameEx () from /usr/lib/libpython2.7.so.1.0
#75 0x00007f340feb8290 in PyEval_EvalCodeEx () from /usr/lib/libpython2.7.so.1.0
#76 0x00007f340feb7489 in PyEval_EvalFrameEx () from /usr/lib/libpython2.7.so.1.0
#77 0x00007f340feb8290 in PyEval_EvalCodeEx () from /usr/lib/libpython2.7.so.1.0
#78 0x00007f340fe47b00 in function_call () from /usr/lib/libpython2.7.so.1.0
#79 0x00007f340fe23c13 in PyObject_Call () from /usr/lib/libpython2.7.so.1.0
#80 0x00007f340feb20d7 in PyEval_CallObjectWithKeywords () from /usr/lib/libpython2.7.so.1.0
#81 0x00007f341019dd6d in ?? () from /usr/lib/kde4/kpythonpluginfactory.so
#82 0x00007f341019e8ae in ?? () from /usr/lib/kde4/kpythonpluginfactory.so
#83 0x00007f341a4d7d9e in KCModuleLoader::loadModule(KCModuleInfo const&, KCModuleLoader::ErrorReporting, QWidget*, QStringList const&) () from /usr/lib/libkcmutils.so.4
#84 0x00007f341a4dcfeb in ?? () from /usr/lib/libkcmutils.so.4
#85 0x00007f341a4dd705 in KCModuleProxy::realModule() const () from /usr/lib/libkcmutils.so.4
#86 0x00007f341a4dda69 in KCModuleProxy::useRootOnlyMessage() const () from /usr/lib/libkcmutils.so.4
#87 0x00007f341a4daa71 in KCMultiDialog::addModule(KCModuleInfo const&, KPageWidgetItem*, QStringList const&) () from /usr/lib/libkcmutils.so.4
#88 0x00007f34155e4bfe in kdemain () from /usr/lib/libkdeinit4_kcmshell4.so
#89 0x0000000000408069 in _start ()

Hm, that probably explains why Synaptiks cannot start.
Can you please verify all Oxygen related packages are up to date?

bcooksley wrote:Hm, that probably explains why Synaptiks cannot start.
Can you please verify all Oxygen related packages are up to date?

I have upgraded my arch using 'pacman -Syu' which upgrades everything. Few days ago it also upgraded the KDE. But I don't know that still after system upgrade, all the oxygen packages are up-to-date or not! As arch is a rolling distro then I think all the packages should be upgraded!
How can I verify that?

try pacman -Qs oxygen

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root@alpha ~]# pacman -Qs oxygen
local/oxygen-gtk2 1.4.0-1
    Port of the default KDE widget theme (Oxygen) to GTK2
local/oxygen-gtk3 1.2.0-1
    Port of the default KDE widget theme (Oxygen) to GTK3
local/oxygen-icons 4.11.0-1
    The Oxygen Icon Theme

The relevant parts of Oxygen are part of kde-workspace in this case. In most distributions it is a separate package however.

bcooksley wrote:The relevant parts of Oxygen are part of kde-workspace in this case. In most distributions it is a separate package however.

I guess it is a comment

It was an observation, yes. In this case, it appears you may actually be triggering a bug in the Oxygen theme. Which version of KDE are you using?