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

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#!/usr/bin/env python

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# -*- coding: utf-8 -*-

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from __future__ import absolute_import

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from __future__ import print_function

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import traceback

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import sys

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from runtime.Worker import worker

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MainWorker = worker()

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_PLCObjectSingleton = None

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def GetPLCObjectSingleton():

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    assert _PLCObjectSingleton is not None

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    return _PLCObjectSingleton

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def LogMessageAndException(msg, exp=None):

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    if exp is None:

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        exp = sys.exc_info()

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    if _PLCObjectSingleton is not None:

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        _PLCObjectSingleton.LogMessage(0, msg + '\n'.join(traceback.format_exception(*exp)))

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    print(msg)

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    traceback.print_exception(*exp)

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def CreatePLCObjectSingleton(*args, **kwargs):

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    global _PLCObjectSingleton

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    from runtime.PLCObject import PLCObject  # noqa # pylint: disable=wrong-import-position

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    _PLCObjectSingleton = PLCObject(*args, **kwargs)