Conform to pep8 and pylint :

pep8 version: 2.3.1
./ConfigTreeNode.py:130:49: E231 missing whitespace after ','
./editors/Viewer.py:643:24: E128 continuation line under-indented for visual indent
./editors/Viewer.py:670:12: E221 multiple spaces before operator
./editors/Viewer.py:671:13: E221 multiple spaces before operator
./editors/Viewer.py:2138:52: E203 whitespace before ':'
./editors/Viewer.py:2139:66: W291 trailing whitespace
./controls/VariablePanel.py:154:25: E231 missing whitespace after ','
./controls/LocationCellEditor.py:88:1: W293 blank line contains whitespace
./controls/LocationCellEditor.py:191:25: E221 multiple spaces before operator
./controls/LocationCellEditor.py:200:17: E128 continuation line under-indented for visual indent

pylint 1.8.3,
************* Module controls.LocationCellEditor
controls/LocationCellEditor.py:200: [C0330(bad-continuation), ] Wrong continued indentation (add 9 spaces).
_("Selected location is identical to previous one"))
^ |
************* Module controls.VariablePanel
controls/VariablePanel.py:154: [E1601(print-statement), VariableTable.SetValue] print statement used
************* Module editors.Viewer
editors/Viewer.py:643: [C0330(bad-continuation), ] Wrong continued indentation (add 1 space).
self.GetAddMenuCallBack(self.AddNewComment))
^|
editors/Viewer.py:598: [W0612(unused-variable), Viewer.AddDivergenceMenuItems] Unused variable 'add_branch'
editors/Viewer.py:1655: [E0602(undefined-variable), Viewer.PopupConnectionMenu] Undefined variable 'variable_type'
editors/Viewer.py:1649: [W0612(unused-variable), Viewer.PopupConnectionMenu] Unused variable 'connection_type'
************* Module connectors.PYRO.PSK_Adapter

#!/bin/sh



cleanup()
{
    find $PYTEST_DIR -name '*.pyc' -delete
}



print_help()
{
    echo "Usage: run_python_tests.sh [--on-local-xserver]"
    echo ""
    echo "--on-local-xserver"
    echo "                all tests are run on local X-server. "
    echo "                User can see test in action."
    echo "                Any interaction (mouse, keyboard) should be avoided"
    echo "                By default without arguments script runs pytest on virtual X serverf."
    echo ""

    exit 1
}

main()
{
    LC_ALL=ru_RU.utf-8
    PYTEST_DIR=./tests/tools

    if [ ! -d $PYTEST_DIR ]; then
	echo "Script should be run from top directory in repository"
	exit 1;
    fi

    use_xvfb=0
    if [ "$1" != "--on-local-xserver" ]; then
	export DISPLAY=:42
	use_xvfb=1
	Xvfb $DISPLAY -screen 0 1280x1024x24 &
	sleep 1
    fi


    cleanup

    ret=0
    DELAY=400
    KILL_DELAY=$(($DELAY + 30))
    timeout -k $KILL_DELAY $DELAY pytest --timeout=10 ./tests/tools
    ret=$?

    cleanup

    [ $use_xvfb = 1 ] && pkill -9 Xvfb
    exit $ret
}


[ "$1" = "--help" -o "$1" = "-h" ] && print_help
main $@