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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# This file is part of Beremiz.

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# See COPYING file for copyrights details.

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from __future__ import absolute_import

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from plcopen.XSLTModelQuery import XSLTModelQuery

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class InstancesPathCollector(XSLTModelQuery):

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    """ object for collecting instances path list"""

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    def __init__(self, controller):

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        self.Instances = []

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        XSLTModelQuery.__init__(self,

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                                controller,

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                                "instances_path.xslt",

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                                [("AddInstance", self.AddInstance)])

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    def AddInstance(self, context, *args):

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        self.Instances.append(args[0][0])

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    def Collect(self, root, name, debug):

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        self._process_xslt(root, debug, instance_type=name)

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        res = self.Instances

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        self.Instances = []

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        return res